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Vestnik MGSU 2013/3

DOI : 10.22227/1997-0935.2013.3

Articles count - 34

Pages - 262

ARCHITECTURE AND URBAN DEVELOPMENT. RESTRUCTURING AND RESTORATION

The order of an architectural column in the eraof elizabethan baroque (1742—1762) in St. Petersburg

  • Voznyak Ekaterina Ryurikovna - Saint-Petersburg State University of Architecture and Civil Engineering (SPSUACE) Candidate of Architectural Sciences, Associate Professor, Saint-Petersburg State University of Architecture and Civil Engineering (SPSUACE), 4 2-ya Krasnoarmeyskaya St., St.Petersburg, 190005, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 7-15

The author discusses structural principles of the column order attributed to Elizabethan Baroque Style and uses St. Petersburg monuments as examples. The article has drawings of columns and architectural details of the Baroque style buildings in St. Petersburg. The author identifies their specific stylistic features and compares them with classical architectural forms.The column order of the Elizabethan Baroque style is built according to classical rules, although it has substantial deviations. Back then, only three types of orders were used: a Doric order, an Ionic order and a composite order. Order profiles and capitals were changed in the era of Elizabethan baroque style; therefore, Ionian and composite capitals of the Elizabethan Baroque style differ from those of Vignola and Palladio. Necks of capitals were smooth or had flutes. The Elizabethan Ionic order is based on a subset of Ionic capitals, typical for the era of late Renaissance. Creative ideas and skills of architects developed an own language of architectural forms, typical for this style.

DOI: 10.22227/1997-0935.2013.3.7-15

References
  1. Dzhakomo Barotstsio Da Vin’ola. Pravilo pyati orderov [Rules of Five Orders]. Moscow, Arkhitektura-S Publ., 2005, 168 p.
  2. Blinova E.K. Inoskazatel’nye simvoly rastitel’nykh motivov v ordernykh kompozitsiyakh arkhitektury Peterburga [Allegorical Symbols of Vegetative Motives in Order Compositions of St.Petersburg Architectural Monuments]. Arkhitekton: izvestiya vuzov. [Architecton: News of Institutions of Higher Education]. June 2011, no. 34. Available at: archvuz.ru/numbers/2011_2/018.
  3. Gans Blyum. V-Colvmnae ili opisanie i primenenie pyati orderov [V-Colvmnae or Description and Application of Five Orders]. Moscow, Vsesoyuznaya Akademiya arkhitektury publ., 1936, 112 p.

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The architectural sketch

  • Kozhevnikov Aleksandr Mikhaylovich - Firma GIPROKON L-D Limited Liability Company member, Moscow Architects' Union, lecturer, Department of Rural Architecture, Firma GIPROKON L-D Limited Liability Company, 7 Gilyarovskogo St., Moscow, 129090, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 16-25

The contribution of architectural sketching skills into the classical architectural education is unusually valuable, as this is the way future architects articulate and communicate their ideas to others.The author discusses the features of architectural sketching. He also analyzes methods of finding architectural forms, their crystallization and formation. Basic methods of contemporary architectural sketching include graphics, model-based and virtual techniques.Graphics is simple and widely used; it has numerous strengths and weaknesses. This method employs the whole range of graphic and pictorial techniques. This article contains a classification of graphic methods of sketching. The classification is built around the sketching instrument (a slate pencil, a brush, etc.).Model sketching provides a sense of touch and generates certain textures. Therefore, model sketching is a highly intuitive and convenient tool employed at initial stages of design.A virtual method integrates the notions of “lines” and “volumes” into shapes having real physical properties.Each sketching method is self-contained. Skillful application of all the above methods of architectural sketching is the keystone to further successful design.

DOI: 10.22227/1997-0935.2013.3.16-25

References
  1. Barkhin B.G. Metodika arkhitekturnogo proektirovaniya [Methodology of Architectural Design]. Moscow, Stroyizdat Publ., 1982, p. 35.
  2. Yung K.G. Arkhetip i simvol [ Archetype and Symbol]. Moscow, Renessans Publ., 1991, p. 173.
  3. Dutsev M. Avtorskie metody v arkhitekture. Ot eskiza k proizvedeniyu [Personal Methods in Architecture. From the Sketch to the Work of Art]. Available at: http://www.archiludi.ru/?p=1161. Date of access: 12.01.13.
  4. Maksimov O.G. Risunok v professii arkhitektora [A Drawing in the Profession of an Architect]. Moscow, Stroyizdat publ., 1999, p. 389.
  5. Zaytsev K.G. Grafika i arkhitekturnoe tvorchestvo [Graphics and Art of Architecture]. Moscow, Stroyizdat Publ., 1979, p. 21.
  6. Revyakin P.P. Tekhnika akvarel’noy zhivopisi [Watercolour Painting Techniques]. Moscow, Gos. Izd-vo literatury po str., arkhit. i stroit. materialam publ., 1959, p. 67.
  7. Stepanov A.V. Ob”emno-prostranstvennaya kompozitsiya [Three-dimensional Composition]. Moscow, Stroyizdat Publ., 1993, p. 217.
  8. Stasyuk N.G., Kiseleva T.Yu., Orlova I.G. Osnovy arkhitekturnoy kompozitsii [Fundamentals of Architectural Composition]. Moscow, Dograf Publ., 2001, p. 6.
  9. Peter Zellner. Hybrid New Forms in Digital Architecture Space. Thames & Hudson, 1999, p. 72.
  10. Altunyan A.O. Arkhitekturnyy nabrosok v postdigital’nuyu epokhu [An Architectural Sketch in the Post-digital Era]. Arkhitektura i sovremennye informatsionnye tekhnologii (AMIT) [Architecture and Advanced Information Technologies (AMIT)]. 2011, no. 1(14). Available at: http://marhi.ru/AMIT/2011/1kvart11/altunian/abstract.php/ Date of access: 12.01.13.

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Besieged nature

  • Tkachev Valentin Nikitovich - Moscow State University of Civil Engineering (MGSU) Doctor of Architecture, Professor, Department of Design of Buildings and Town Planning, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 26-33

The history and present-day problems accompanying the relationship between Man and the human habitat are considered in the article. Understanding of the role of Nature in the human life is demonstrated by the architectural morphogenesis.K. Marx identified the two ways of consumption of natural resources. According to the first one, people enjoyed natural benefits as they were. The second one contemplated transformation, physical and chemical treatment of natural resources.Predominance of the consumer-style attitude to Nature means transition to the phase of transformation of natural resources into the forms suitable for consumption.The history of the relationship between Nature and Man is composed of the following phases:Man as the slave of Nature; Man as the student of Nature; Man as the lord of Nature;Man as the destroyer of Nature and a parasite consuming its resources; Man as the repentant sinner failing to take any effort to repay the debt.The educational phase of the architecture means identification of structural features of natural materials integrated into tectonic systems of structures. The second wave of imitation of Nature, or mimesis, had an esthetic orientation and was typical for early cultures. Separation of structural and ornamental features of a wall marked the third wave of assimilation of Nature in the architecture of Europe starting from the Renaissance and through the era of the bourgeois pragmatism. However, it was the design of wide-span structures that served as the prerequisite of technological borrowings from the phenomena of the wildlife (skeletons, webs, folds), or the third wave of assimilations. The idea of architecture as the subject having the properties of a living organism marked the fifth wave of appeal to the wildlife, its transient forms and changing organisms.The understanding of the ecological responsibility of Man embedded in the architecture contemplated the sixth wave of the human activities. What will be the seventh wave of relationship between Nature and Man?

DOI: 10.22227/1997-0935.2013.3.26-33

References
  1. Marx K. Formy, predshestvuyushchie kapitalisticheskomu proizvodstvu [Pre-capitalist Modes of Production]. Moscow, Politizdat Publ., 1940, 52 p.
  2. Potapov A.D. Ekologiya [Ecology]. Moscow, Vyssh. shk. publ., 2004, 528 p.
  3. Tasalov V.I. Ocherk esteticheskikh idey arkhitektury kapitalisticheskogo obshchestva [Essay of Esthetic Ideas of the Architecture Typical for the Capitalist Society]. Moscow, Nauka Publ., 1979, 336 p.
  4. Shuazi O. Istoriya arkhitektury [History of Architecture]. Moscow, AN SSSR Publ., vol. 1, 1935, 575 p.
  5. Haeckel E. Kunstformen und Natur. Leipzig und Wien, 1899.
  6. Ryabushin A., Dvorzhak K. Prognostika v arkhitekture i gradostroitel’stve [Prognostics in Architecture and Urban Planning]. Moscow, Stroyizdat Publ., 1983, 184 p.
  7. Tkachev V.N. Veduty [Architectural Views]. Moscow, MGSU Publ., 2012, 291 p.
  8. Ragon M. Goroda budushchego [Towns of the Future]. Moscow, MIR Publ., 1969, 296 p.
  9. Vuek Ya. Mify i utopii arkhitektury xx veka [Myths and Utopias of the Architecture of the 20th Century]. Moscow, Stroyizdat Publ., 1990, 288 p.
  10. Lebedev Yu.S. Arkhitekturnaya bionika [Architectural Bionics]. Moscow, Stroyizdat Publ., 1990, 268 p.

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Megalopolis as the mirrorof the soul

  • Frolov Aleksandr Viktorovich - Moscow State University (MSU) Candidate of Philosophical Sciences, Senior Lecturer; +7 (495) 939-14-21, Moscow State University (MSU), 27-4 Lomonosovskiy prospekt, Room G-324, GSP-1, Moscow, 119991, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Sukhodol’skaya Natal’ya Pavlovna - Moscow State University of Civil Engineering (MGSU) Candidate of Philosophical Sciences, Department Manager (Engineer), Department of Philosophy; +7 (499) 183-24-10, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 34-40

The article focuses on some civilization-related factors determining the life of a contemporary megalopolis and influencing the structure of the human soul. The system of global capitalism appears to be the most important factor producing a strong impact onto the urban population. The present-day megalopolis operates as an economic centre having pragmatic rhythms and spaces. «Homo economicus» is a relevant definition of the present-day man.This state of affairs reflects the structure of the human soul and its needs. It is overcrowded with sensual stimuli and temptations producing misbalance and stress. Two phenomenological distinctions are employed to analyze the experience of urban residents: noise vs. silence and motion vs. quietness. Noise and motion constitute the background of the human experience here; silence and quietness are local and volatile. On the contrary, outside of the city, silence is the background of the experience, and any motion vanishes in the realm of quietness. Nature is calm, and we need its calmness to give some rest to our senses. The effect of permanent haste typical for the lifestyle in big cities makes people unconscious of themselves. They lose their lifetime to implement their basic functions like eating/working/sleeping. Any higher incomes and comfort don’t make people happier; therefore, they have to look for alternative lifestyles (e.g. “downshifting”). Some people are not eager to be part of the global economy, but they have no opportunity to get out of the urban space. They need some remedy to resist the urban attack. That remedy could be a kind of a psychological technique reducing the effect of aggression. In this respect, the practice of hesychia deriving from the Christian ascetical tradition seems to be useful for an urban resident allowing him/her to attain the state of inner silence. This technique may be employed as a way to survive in the urban haste.

DOI: 10.22227/1997-0935.2013.3.34-40

References
  1. Devis M. Planeta trushchob [Planet of Slums]. Logos [Logos]. 2008, no. 3(66), pp. 108—129.
  2. Gorodskoe naselenie: aglomeratsii [Urban Population: Agglomerations]. Available at: http://www.citypopulation.de/world/Agglomerations.html. Date of access: September 09, 2012.
  3. Frolov A.V., Sukhodol’skaya N.P. K fenomenologii gorodskogo prostranstva [On Phenomenology of the Urban Space]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, vol. 3, pp. 394—399.
  4. Mezentsev S.D. Sovremennoe gradostroitel’stvo: dolzhnoe i sushchee, idealy i real’nost’ [Urban Planning Today: What Is Due and What Is Available. Ideals and Reality]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 4, vol. 3, pp. 389—393.
  5. Merleau-Ponty M. Fenomenologiya vospriyatiya [Phenomenology of Perception]. St.Petersburg, 1999.
  6. Soyya E. Kak pisat’ o gorode s tochki zreniya prostranstva [Writing about the City from the Viewpoint of Space]. Logos [Logos]. 2008, no. 3(66), pp. 130—140.
  7. Lavrinets E. Chtenie gorodskogo prostranstva: predvaritel’nye zametki [Reading the Urban Space: Preliminary Notes]. Topos. Filosofsko-kul’turologicheskiy zhurnal [Topos. Journal of Philosophy and Culture Studies]. 2004, no. 2(9), pp. 82—89.
  8. Sennet R. Kapitalizm v bol’shom gorode: globalizatsiya, gibkost’ i bezrazlichie [Capitalism in the Big City: Globalization, Flexibility and Indifference]. Logos [Logos]. 2008, no. 3(66), pp. 95—107.
  9. Bikbov A. Moskva/Parizh: prostranstvennye struktury i telesnye skhemy [Moscow/Paris: Spatial Structures and Corporal Patterns]. Logos [Logos]. 2002, no. 3(34), pp. 1—24.
  10. Khoruzhiy S.S. Fenomenologiya askezy [Phenomenology of Asceticism]. Moscow, 1998.

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DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Improved eight-node finite elementof the continuous medium

  • Agapov Vladimir Pavlovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Applied Mechanics and Mathematics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoye shosse, Moscow, 129337, Russian Federation; +7 (495) 583-47-52; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Vasil’ev Aleksey Viktorovich - Rodnik Limited Liability Company design engineer, Rodnik Limited Liability Company, 22 Kominterna St., Tver, 170000, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 41-45

Solid eight-node finite elements are widely used in practical design in spite of the fact that numerous curvilinear finite elements having multiple nodes are developed. This element is suitable for nonlinear calculations if characteristics of a structure are subject to numerous alterations. Therefore, it is preferable that all calculations were simple. An eight-node element meets this requirement. A standard linear shape function is used by many software programmes to construct this element. Strains and stresses remain constant within the limits of the above element.The authors have developed and implemented a solid eight-node isoparametric finite element using PRINS software. The element developed by the authors has improved bending properties. A quadratic out-of-node shape function was used to improve the bending properties of the element. Principal formulas and testing results are provided. Numerical results confirm the accuracy and effectiveness of the element developed by the authors.

DOI: 10.22227/1997-0935.2013.3.41-45

References
  1. Ayron B.M. Inzhenernye prilozheniya chislennogo integrirovaniya v metode zhestkostey [Engineering Applications of Numerical Integration in the Stiffness Method]. Raketnaya tekhnika i kosmonavtika [Rocket Engineering and Space Exploration]. 1966, vol. 4, no. 11, pp. 213—216.
  2. Zienkiewicz O.C., Taylor R.L. The Finite Element Method for Solid and Structural Mechanics. McGraw-Hill, 2005, 631 p.
  3. Bathe K.J. Finite Element Procedures. Prentice Hall, Inc., 1996, 1037 p.
  4. Punch E.F., Atluri S.N. Applications of Isoparametric Three-dimensional Hybrid-stress Finite Elements with Least-order Stress Fields. Computers and Structures, vol. 19, no. 3, 1984.
  5. Agapov V.P., Shugaev V.V., editor. Issledovanie prochnosti prostranstvennykh konstruktsiy v lineynoy i nelineynoy postanovkakh s ispol’zovaniem vychislitel’nogo kompleksa «PRINS» [Strength Analysis of 3D Structures Using PRINS Software]. Prostranstvennye konstruktsii zdaniy i sooruzheniy (issledovanie, raschet, proektirovanie, primenenie). Sb. st. [3D Constructions of Buildings and Structures (Research, Analysis, Design and Application). Collection of articles]. Ìoscow, 2008, no. 11, pp. 57—67.
  6. Agapov V.P. Soprotivlenie materialov [Strength of Materials]. Moscow, Ekzamen Publ., 2009, 256 p.

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Research into interrelations between plasticity and hardness of standardstrength steel grades

  • Gustov Yuriy Ivanovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Profes- sor, Department of Machinery, Machine Elements and Process Metallurgy; +7 (499) 183-94-95, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Rus- sian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Voronina Irina Vladimirovna - Moscow State University of Civil Engineering (MGSU) Senior Lecturer, Department of Building and Hoisting Machinery, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 182-16-87; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Allattouf Hassan Latuf - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Machinery, Machine Elements and Process Metallurgy, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Rus- sian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 46-52

The objective of the study is research into interrelation between values of plasticity(d, y) and hardness (HB).Numerical values of hardness are insufficient to make accurate assessments of plasticity values. Meanwhile, hardness is the property identified using small-sized samples extracted from the metalwork of restored and reconstructed buildings. The most suitable method is the Rockwell one used to obtain HRB or HRC hardness values. However, these values maintain an analytical relationship neither with durability, nor with plasticity values. The difference between metal testing methods consists in their relation to dimensions: HRB and HRC values are dimensionless, while HB values are size dependent (kgf/mm2, or MPa). Therefore, the approach employed in this article can be used to generate supplementary information about the properties of metals using HRB or HRC hardness measurements.It is noteworthy that the proposed technique of coordination of HRB hardness val-ues with HB hardness values may be employed to, first, analyze σ and σ sizes using HBт вvalues, and second, to identify the nature of relationship between HRB, on the one hand,and d and y values, on the other hand, to compose the equation of relative strength and plasticity values and to assess the most important factor of reliability of metals.

DOI: 10.22227/1997-0935.2013.3.46-52

References
  1. Tylkin M.A. Spravochnik termista remontnoy sluzhby [Reference Book for a Heat Treater of the Repair Service]. Moscow, Metallurgiya Publ., 1981, 647 p.
  2. Mozberg R.K. Materialovedenie [Material Engineering]. Valgus Publ., Tallinn, 1976, p. 554.
  3. Gulyaev A.P. Metallovedenie [Metal Engineering]. Moscow, Metallurgiya Publ., 1986, 541 p.
  4. Arzamasov B.N., Makarova V.I., Mukhin G.G. Materialovedenie [Material Engineering]. Moscow, MGTU im. N.E. Baumana publ., 2008, 648 p.
  5. GOST 8479—70. Kategorii prochnosti, normy mekhanicheskikh svoystv, opredelennye pri ispytanii na prodol’nykh obraztsakh, i normy tverdosti [All-Russian State Standard 8479—70. Strength Categories, Standards of Mechanical Properties Identified in the Course of Testing of Longitudinal Samples, and Standards of Hardness].
  6. Gustov Yu.I., Gustov D.Yu., Bol’shakov V.I. Prochnostno-plasticheskaya indeksatsiya metallicheskikh materialov [Strength and Plasticity Indexing of Metal Materials]. Metallurgiya i gornorudnaya promyshlennost’ [Metallurgy and Mining Industry]. 1996, no. 3-4, pp. 31—33.
  7. Gustov Yu.I., Gustov D.Yu. Issledovanie vzaimosvyazi mekhanicheskikh svoystv metallicheskikh materialov. Teoreticheskie osnovy stroitel’stva. Doklady VII Pol’sko-rossiyskogo seminara [Research into Interrelations between Mechanical Properties of Metal Materials. Theoretical Fundamentals of Civil Engineering. Collected works of the 7th Russian-Slovak-Polish Seminar]. Moscow, ASV Publ., 1998, pp. 225—228.
  8. Gustov Yu.I., Gustov D.Yu., Voronina I.V. Opredelenie tverdosti staley po khimicheskomu sostavu i uglerodnomu ekvivalentu. Teoreticheskie osnovy stroitel’stva. Doklady XVII Pol’sko-rossiysko-slovatskogo seminara [Analysis of Steel Hardness on the Basis of the Chemical Composition and Carbon Equivalent. Theoretical Fundamentals of Civil Engineering. Collected works of the 7th Polish-Russian-Slovak Seminar]. Part 2. Zilina, 2008, pp. 237—244.
  9. Gustov Yu.I., Gustov D.Yu., Voronina I.V. Sinergeticheskie kriterii metallicheskikh materialov. Teoreticheskie osnovy stroitel’stva. Doklady XV Rossiysko-slovatsko-pol’skogo seminara [Synergetic Criteria of Metal Materials. Theoretical Fundamentals of Civil Engineering. Collected works of the 15th Russian-Slovak-Polish Seminar]. Warsaw, 2006, pp. 179—184.
  10. Skudnov V.A. Primenenie kompleksov razrusheniya sinergetiki dlya otsenki sostoyaniya i povedeniya (rabotosposobnosti) metallov. Fraktaly i prikladnaya sinergetika «FiPS-2005». Trudy IV mezhdunar. mezhdistsiplinarnogo simpoziuma. [Application of Synergy Destruction Sets in Assessment of Condition and Behaviour (Serviceability) of Metals. Fractals and Applied Synergy «FiPS-2005». Works of the 4th International Inter-disciplinary Symposium]. Moscow, Interkontakt Nauka Publ., 2005, pp. 221—226.
  11. Sorokin V.G., Volosnikova A.V., Vyatkin S.A. Marochnik staley i splavov [Reference Book of Steel and Alloy Grades]. Moscow, Mashinostroenie Publ., 1989, 640 p.

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Transient vibrations of a cantilever bar with an attachedabsorber in case of pre-set initial conditions

  • Dukart Adam Vilebal’dovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Structural Mechanics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Pham Viet Ngoc - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Structural Mechanics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Pham Thanh Binh - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Structural Mechanics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 53-60

The authors consider decaying flexural vibrations of a cantilever bar having a permanent cross section. The mass is concentrated at the free end, and the impact absorber is attached to the mass. Initial conditions are pre-set by the authors. Properties of the bar and the damper are considered in pursuance of the Е.S. Sorokin theory of frequency independent friction whereby it is accepted that the initial system demonstrates disproportionate friction.The effect of impacts is assessed using the restitution coefficient. It is assumed that vibrations of the system are described by linear differential equalizations. The Fourier method of division of variables in combination with the method of initial parameters is employed, and motion of the mass of the bar and absorber is presented in an explicit form.The solution is used to study the system behaviour exposed to the instantaneous single impulse applied to the concentrated mass at the end of the bar. The influence of parameters of dynamic and impact absorbers onto transient vibrations of the system is studied. In addition, the impact of higher modes of vibrations on overall results is estimated.

DOI: 10.22227/1997-0935.2013.3.53-60

References
  1. Korenev B.G., Reznikov L.M. Dinamicheskie gasiteli kolebaniy: teoriya i tekhnicheskie prilozheniya [Dynamic Dampers of Vibrations: Theory and Engineering Applications]. Moscow, Nauka Publ., 1988, 304 p.
  2. Vul’fson M.N. K voprosu o vybore parametrov dinamicheskogo gasitelya kolebaniy. Nelineynye kolebaniya i perekhodnye protsessy v mashinakh [On Selection of Parameters of a Dynamic Absorber. Nonlinear Vibrations and Transition Processes in Machines]. Moscow, Nauka Publ., 1972, pp. 347—354.
  3. Dukart A.V., Pham Viet Ngoc, Pham Thanh Binh. K opredeleniyu svobodnykh kolebaniy dvukhmassovoy sistemy s dempfirovaniem [On Identification of Free Oscillations of the Damped Dual-mass System]. Izvestiya vuzov. Stroitel’stvo [News of Institutions of Higher Education. Construction.] 2011, no. 5, pp. 98—106.
  4. Dukart A.V., Pham Thanh Binh. O perekhodnykh rezhimakh kolebaniy odnomassovoy sistemy s udarnym gasitelem pri zadannykh nachal’nykh usloviyakh [On Transitory Vibration Modes of a Single-mass System Exposed to the Impact Damper in Case of Pre-set Initial Conditions]. Izvestiya vuzov. Stroitel’stvo [News of Institutions of Higher Education. Construction.] 2011, no. 6, pp. 16—22.
  5. Varat S.N., Sankar S. Single Unit Impact Damper in Free and Forced Vibration. Journal of Sound and Vibration. 1985, vol. 99, no. 1, pp. 85—94.
  6. Dukart A.V. Zadachi teorii udarnykh gasiteley kolebaniy [Objectives of the Theory of Impact Vibration Dampers]. Moscow, ASV Publ., 2006.
  7. Goldsmit V. Udar. Teoriya i fizicheskie svoystva soudaryaemykh tel [Impact. Theory and Physical Properties of Colliding Bodies]. Moscow, Stroyizdat Publ., 1965.

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Analysis of available space structure joints and designof demountable modular joints

  • Inzhutov Ivan Semenovich - Siberian Federal University (SibFU) Doctor of Technical Sciences, Professor, Department of Building Structures and Control Systems, Director, Civil Engineering Institute, Siberian Federal University (SibFU), 79 pr. Svobodnyy, Krasnoyarsk, 660041, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Dmitriev Petr Andreevich - Institute of Civil Engineering, Siberian Federal University (SFU) Doctor of Technical Sciences, Professor, Department of Structural Units and Controlled Systems; +7 (391) 252-78-11, Institute of Civil Engineering, Siberian Federal University (SFU), .
  • Deordiev Sergey Vladimirovich - Institute of Civil Engineering, Siberian Federal University (SFU) +7 (391) 252-78-64, Institute of Civil Engineering, Siberian Federal University (SFU), ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Zakharyuta Vasiliy Viktorovich - Institute of Civil Engineering, Siberian Federal University (SFU) postgraduate student, Department of Structural Units and Controlled Systems, Institute of Civil Engineering, Siberian Federal University (SFU), ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 61-71

The article is an overview of various designs developed for joints of rod elements of space structures. Designs under consideration include those developed by domestic and foreign researchers and structural engineers. Space joints are clustered on the basis of their characteristic features, and their principal strengths and weaknesses are specified by the authors.The authors’ overview serves as the basis for an advanced structural solution developed for modular joints of space elements. A space joint consists of four space details having holes that are fastened to the central element by two bolts (screws). A flat plate with holes is attached to the edge of the central element. Space details and the core element are to have a gap between them. Rod ends are inserted into gaps and fastened to joints with bolts. The proposed solution may be used to reduce the material consumption rate (steel and plastic) and to simplify the assembly of structures. The solution proposed by the authors also improves the reliability of joints due to the integrity of elements, their rigid fastening to the central element, and the use of two cross-section bolts.

DOI: 10.22227/1997-0935.2013.3.61-71

References
  1. Makowski Z.S. Development of Jointing Systems for Modular Prefabricated Steel Space Structures. Proceedings of the international symposium. Warsaw, Poland, 2002, pp. 17—41.
  2. Chilton J. Space Grid Structures. Produced by Plant a Tree. Great Britain, 2000.
  3. Trofimov V.I., Kaminskiy A.M. Legkie metallicheskie konstruktsii zdaniy i sooruzheniy [Lightweight Metal Constructions of Buildings and Structures]. Moscow, ASV Publ., 2002, pp. 130—132.
  4. Khvatkin Yu.S. Avtorskoe svidetel’stvo 2087634 RU. Uzel soedineniya sterzhney prostranstvennogo karkasa [Authorship Certificate 2087634 RU. Joint for Rods of a Space Frame].
  5. Kudishin V.I., Trofimov V.I. Avtorskoe svidetel’stvo 497390 SU. Uzlovoe soedinenie prostranstvennoy sterzhnevoy konstruktsii [Joint for a Space Rod Structure].
  6. Ramaswamy G.S., Eekhout M., Suresh G.R. Steel Space Frames, Analysis, Design and Construction. London, Thomas Telford Publishing, 2002.
  7. Shteger J.E.O. Avtorskoe svidetel’stvo 1794151 SSSR. Uzel soedineniya sterzhney prostranstvennogo karkasa [Authorship Certificate 1794151 USSR. Joint for Rods of a Space Frame].
  8. Vestrut Space Grid Systems. Available at: http://www.vestrut.it. Date of access: October 11, 2012.
  9. TU 5285-001-47543297—09. Sterzhni i uzlovye elementy sistemy MARKhI [Technical Specifications 5285-001-47543297—09. Rods and Joint of the MARKHI System]. Moscow, 2009.
  10. Zherbin M.M., Tereshchenko A.P., Nilov A.A., Yatsoshek I. Avtorskoe svidetel’stvo 690135 SU. Uzlovoe soedinenie trubchatykh sterzhney prostranstvennogo karkasa [Authorship Certificate 690135 SU. Joint of Tubular Rods of a Space Frame].
  11. Tereshchenko A.P., Yatsoshek I., Nilova A. Avtorskoe svidetel’stvo 702133 SU. Uzlovoe soedinenie trubchatykh sterzhney prostranstvennogo karkasa [Authorship Certificate 702133 SU. Joint of Tubular Rods of a Space Frame].
  12. Nikiforov V.G., Potapov V.N., Koval’ E.A., Leonova V.N. Avtorskoe svidetel’stvo 1063958 SU. Uzlovoe soedinenie sterzhney prostranstvennogo karkasa [Authorship Certificate 1063958 SU. Joint of Rods of a Space Frame].
  13. Deev V.P., Ptichkin V.P., Kondrashov M.T., Tolstykh A.A., Korotkov V.V. Avtorskoe svidetel’stvo 779529 SSSR. Uzlovoe soedinenie sterzhney prostranstvennogo pokrytiya [Authorship Certificate 779529 USSR. Joint of Rods of a Shell Roof].
  14. Klyachin A.Z., Gorelov N.G. Avtorskoe svidetel’stvo 1805180 SSSR. Reshetchataya prostranstvennaya konstruktsiya [Authorship Certificate 1805180 USSR. Grid Space Structure].
  15. Kalugin M.V., Kormilitsyn B.I. Avtorskoe svidetel’stvo 543720 SSSR. Uzlovoe soedinenie sterzhney prostranstvennogo karkasa [Authorship Certificate 543720 USSR. Joint for Rods of a Space Frame].
  16. Kalugin M.V., Shirokov B.I., Anelikov V.I., Surin N.I. Avtorskoe svidetel’stvo 937647 SSSR. Uzlovoe soedinenie sterzhney prostranstvennogo karkasa [Authorship Certificate 937647 USSR. Joint for Rods of a Space Frame].

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Consideration of reflected wavesas part of analysis of plane elements

  • Loktev Aleksey Alekseevich - Moscow State University of Civil Engineering (МGSU) +7 (499) 183-24-01, Moscow State University of Civil Engineering (МGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Stepanov Roman Nikolaevich - Moscow State University of Civil Engineering (МGSU) Candidate of Technical Sciences, Associate Professor, Department of Theoretical Mechanics and Aerodynamics; +7 (499) 183-24-01, Moscow State University of Civil Engineering (МGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 72-80

The authors study the distribution pattern of wave surfaces inside the orthotropic plate having curvilinear anisotropy. Dynamic behavior of the target is described by wave equations taking account of the transverse shear and rotational inertia of transverse cross-sections and of the ability to simulate the process of propagation of elastic waves. These equations are solved using the asymptotic method employed for decomposition of unknown values into time and spatial value series.The problem is resolved to identify the stress values in the points of interaction between direct waves and those reflected by the bottom face of the plate. Description of patterns of propagation of wave fronts inside the target requires a clear understanding of the nature of each wave, its velocity, etc.The research completed by the co-authors has proven that any increase in the thickness of a plate increases maximal stresses in the area of wave formation, while stresses in points of interaction between elastic waves go down, and peak stresses involving transverse waves go down more intensively. Nonetheless, any encounter between direct and reflected waves may either increase, or reduce the final values of principal stresses.The methodology developed by the authors may be employed to identify the coordinates of the points of maximal stresses occurring in medium thickness reinforced orthotropic plates. Awareness of these coordinates makes it possible to identify the appropriate diameter and patterns of arrangement of reinforcing elements.

DOI: 10.22227/1997-0935.2013.3.72-80

References
  1. Thomas T.Y. Plastic Flow and Fracture in Solids. New York, L., Acad. Press, 1961.
  2. Malekzadeh K., Khalili M.R., Mittal R.K. Response of Composite Sandwich Panels with Transversely Flexible Core to Low Velocity Transverse Impact: A New Dynamic Model. International Journal of Impact Engineering. 2007, vol. 34, pp. 522—543.
  3. Rossikhin Yu.A., Shitikova M.V. A Ray Method of Solving Problems Connected with a Shock Interaction. Acta Mechanica, 1994, vol. 102, no. 1-4, pp. 103—121.
  4. Loktev A.A. Udarnoe vzaimodeystvie tverdogo tela i uprugoy ortotropnoy plastinki [Impact Interaction between a Solid Body and an Elastic Orthotropic Plate]. Mekhanika kompozitsionnykh materialov i konstruktsiy [Mechanics of Composite Materials and Structures]. 2005, vol. 11, no. 4, pp. 478—492.
  5. Erofeev V.I., Kazhaev V.V., Semerikova N.P. Volny v sterzhnyakh. Dispersiya. Dissipatsiya. Nelineynost’ [Waves inside Rods. Dispersion. Dissipation. Non-linearity.]. Moscow, FIZMATLIT Publ., 2002, 208 p.
  6. Eliseev V.V. Mekhanika uprugikh tel [Mechanics of Elastic Bodies]. St.Petersburg, SPbGTU Publ., 1999, 341 p.
  7. Biryukov D.G., Kadomtsev I.G. Uprugoplasticheskiy neosesimmetrichnyy udar parabolicheskogo tela po sfericheskoy obolochke [Elastoplastic Assymmetric Concussion of a Parabolic Body against a Spherical Shell]. Prikladnaya mekhanika i tekhnicheskaya fizika [Applied Mechanics and Applied Physics]. 2005, vol. 46, no. 1, pp. 181—186.
  8. Loktev A.A. Dinamicheskiy kontakt udarnika i uprugoy ortotropnoy plastinki pri nalichii rasprostranyayushchikhsya termouprugikh voln [Dynamic Contact between a Striker and an Elastic Orthotropic Plate Subject to Existence of Evolving Thermoelastic Waves]. Prikladnaya matematika i mekhanika [Applied Mathematics and Mechanics]. 2008, vol. 72, no. 4, pp. 652—658.
  9. Rossikhin Yu.A., Shitikova M.V. The Ray Method for Solving Boundary Problems of Wave Dynamics for Bodies Having Curvilinear Anisotropy. Acta Mechanica, 1995, vol. 109, no. 1-4, pp. 49—64.
  10. Olsson R., Donadon M.V., Falzon B.G. Delamination Threshold Load for Dynamic Impact on Plates. International Journal of Solids and Structures. 2006, vol. 43, pp. 3124—3141.
  11. Achenbach J.D., Reddy D.P. Note on Wave Propagation in Linear Viscoelastic Media. Z. Angew. Math. Phys. 1967, vol. 18, pp. 141—144.
  12. Al-Mousawi M.M. On Experimental Studies of Longitudinal and Flexural Wave Propagations. An Annotated Bibliography. Applied Mechanics Reviews, 1986, vol. 39, no. 6, pp. 853—864.
  13. Karagiozova D. Dynamic Buckling of Elastic-plastic Square Tubes under Axial Impact. I. Stress Wave Propagation Phenomenon. International Journal of Impact Engineering. 2004, vol. 30, pp. 143—166.
  14. Kukudzjanov V.N. Investigation of Shock Wave Structure in Elasto-visco-plastic Bar Using the Asymptotic Method. Archive of Mechanics, 1981, vol. 33, no. 5, pp. 739—751.
  15. Sun C.T. Transient Wave Propagation in Viscoelastic Rods. ASME. Ser. E, J. Appl. Mech. 1970, vol. 37, pp. 1141—1144.
  16. Olsson R. Mass Criterion for Wave Controlled Impact Response of Composite Plates. Composites. Part A. 2000, vol. 31, pp. 879—887.
  17. Tan T.M., Sun C.T. Wave Propagation in Graphite/Epoxy Laminates due to Impact. NASA CR, 1982, 168057.

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Floor structures composedof small reinforced concrete slabs resting on steel beams

  • Malakhova Anna Nikolaevna - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Architectural and Structural Design, Department of Reinforced Concrete Structures, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Balakshin Andrey Sergeevich - State Unitary Enterprise of the Moscow Region Mosoblstroytsnil (Mosoblstroytsnil) Candidate of Technical Sciences, Director, State Unitary Enterprise of the Moscow Region Mosoblstroytsnil (Mosoblstroytsnil), 29-2, Olimpiyskiy prospect, Mytishchi, 141006, Moscow Region; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 81-87

The authors discuss the arrangement of supplementary floors in the rooms of a boiler house in the course of its renovation back in 1988. A structural solution contemplating supplementary floors made of small reinforced concrete slabs resting on steel beams was implemented in the course of renovation. Pursuant to the proposed design solution, reinforced concrete slabs were arranged with their ribs down and leaned upon ribs of metal beams. The findings demonstrate that small reinforced concrete slabs rest both on top and bottom ribs of metal beams. Moreover, patterns of arrangement of slabs different from the design solution were implemented. Some slab ribs looked down while others looked up. Therefore, the implemented pattern of arrangement of the above elements was different from the one specified in the design, and the difference caused different values of load that the slabs were exposed to, and the same about the pre-designed cross sections of slabs. Alteration of design solutions concerning the load produced by reinforced concrete slabs onto metal beams also caused changes in the levels of supplementary floors of the building versus the design solution. This inconsistency can cause difficulties in terms of design associated with any future reconstruction of a boiler house.The analysis of reinforced concrete slabs performed in the course of the research confirms the possibility of their arrangement according to the pattern different from the one specified in the design.

DOI: 10.22227/1997-0935.2013.3.81-87

References
  1. Al’bom usovershenstvovannykh zhelezobetonnykh konstruktsiy dlya kapital’nogo remonta zhilykh domov [Album of Improved Reinforced Concrete Structures for Capital Repairs of Residential Houses]. Leningrad, 1988, pp. 189—212.
  2. SNiP 52-01—2003. Betonnye i zhelezobetonnye konstruktsii. Osnovnye polozheniya [Construction Norms and Rules 52-01—2003. Concrete and Reinforced Concrete Structures. Basic Provisions]. Moscow, 2004, 23 p.
  3. SP 52-101—2003. Betonnye i zhelezobetonnye konstruktsii bez predvaritel’nogo napryazheniya armatury [Code of Rules 52-101—2003. Concrete and Reinforced Concrete Structures without Pre-stressing of the Reinforcement]. Moscow, 2005, 54 p.
  4. Posobie po proektirovaniyu betonnykh i zhelezobetonnykh konstruktsiy iz tyazhelogo betona bez predvaritel’nogo natyazheniya armatury (k SP 52-101—2003) [Manual for Design of Concrete and Reinforced Concrete Structures Made of Heavy Concrete without Pre-stressing of the Reinforcement (to Code of Rules 52-101—2003)]. TsNIIPromzdaniy Publ., Moscow, 2005, 214 p.
  5. Burak L.Ya., Rabinovich G.M. Tekhnicheskaya ekspertiza zhilykh zdaniy staroy zastroyki [Technical Examination of Old Residential Buildings]. Leningrad, 1977, pp. 51—54.
  6. Konstruktivnye detali zhilykh i grazhdanskikh zdaniy [Structural Elements of Residential and Public Buildings]. Moscow, Gosudarstvennoe arkhitekturnoe izdatel’stvo publ., 1949, 129 p.
  7. Ayrumyan E.L., Rumyantseva I.A. Armirovanie monolitnoy zhelezobetonnoy plity perekrytiya stal’nym profilirovannym nastilom [Reinforcement of a Monolithic Concrete Floor Slab Using a Profiled Steel Deck]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2007, no. 4, pp. 25—27.
  8. STO 0047—2005. Perekrytiya stalezhelezobetonnye s monolitnoy plitoy po stal’nomu profilirovannomu nastilu. Raschet i proektirovanie [Standards of Organizations 0047—2005. Composite Steel and Reinforced Concrete Floors with a Monolithic Slab over a Profiled Steel Deck. Analysis and Design]. Moscow, 2005, 63 p.

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BEDDINGS AND FOUNDATIONS, SUBTERRANEAN STRUCTURES

Thermal behaviour of moscow soil and its influence on geotechnical properties of the active zone of bases of structures

  • Kashperyuk Aleksandra Aleksandrovna - Moscow State University of Civil Engineering (MGSU) student, Department of Soils, Foundation Soils and Foundations; +7 (499) 129-18-72, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kashperyuk Pavel Ivanovich - Moscow State University of Civil Engineering (MGSU) Candidate of Geological and Mineralogical sciences, Associate Professor, Department of Engineering Geology and Geo- ecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Potapov Aleksandr Dmitrievich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Head, Department of Engineering Geology and Geoecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Potapov Ivan Aleksandrovich - Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy engineer, Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy, ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 88-97

The authors consider particular aspects of influence of the thermal behaviour of soils of the active zone of bases of structures on the moisture and heat transfer inside the soil, their condition and deformation behaviour in the urban environment. It is noteworthy that any changes of the temperature gradient of soils caused by the moisture and heat transfer alter both the value of filtration ratios of soils having various compositions and their stress-strained state.The authors analyze the process of construction of a specific high-rise building in Moscow to prove that availability of systems of utilities emitting heat in Moscow soils at the depth of 3 — 10 meters below the ground level may increase the soil temperature up to 30 degrees C and even higher, whereas demounting of utility networks will cause an abrupt change in the thermal behaviour of the soil. Moisture redistribution causes heated and dehydrated soils to absorb moisture and to change their condition and principal physical mechanical properties.Having completed a series of field tests, the authors have identified that 1C reduction in the clay soil temperature reduces its modulus of deformation by 0.7…..1.0MPa. It is noteworthy that no projections of alterations in the principal physical and mechanical properties of base soils in the urban environment are possible absent of thermometrical tests accompanying geological engineering surveys. Findings of experimental and field research projects and their theoretical justification have proven that research into filtration properties of soils in the top zone of bases of buildings and structures and engineering networks in the environment of urban ecosystems require wide scale groundwater research to be performed within tight urban territories.

DOI: 10.22227/1997-0935.2013.3.88-97

References
  1. Osipov V.I. Fiziko-khimicheskaya teoriya effektivnykh napryazheniy v gruntakh [Physicochemical Theory of Effective Stresses in Soils]. Moscow, IFZ RAN Publ., 2012, 74 p.
  2. Sergeev E.M., Golodkovskaya G.A., Ziangirov R.S., edited by Sergeev E.M. Gruntovedenie [Soil Science]. Moscow, MGU Publ., 1971, 595 p.
  3. SNIP 11-02—96 Inzhenernye izyskaniya dlya stroitel’stva. Osnovnye polozheniya [Construction Norms and Rules 11-02—96. Engineering Surveys for Construction Purposes. Basic Provisions]. Moscow, Gosstroy Rossii publ., 1997, 44 p.
  4. Korolev V.A., Fadeeva E.A. Sravnitel’nyy analiz termovlagoperenosa v dispersnykh gruntakh raznogo granulometricheskogo sostava [Comparative Analysis of Moisture and Heat Transfer in Disperse Soils Having Different Granulometric Compositions]. Inzhenernaya geologiya [Engineering Geology]. 2012, no. 6, pp. 18—31.
  5. Korolev V.A., Fadeeva E.A., Akhromeeva T.Ya. Zakonomernosti termovlagoperenosa v nenasyshchennykh dispernykh gruntakh [Regularities of Moisture and Heat Transfer in Non-saturated Disperse Soils]. Inzhenernaya geologiya [Engineering Geology]. 1990, no. 3, pp. 16—29.
  6. Grifoll J., Gastor J.M., Cohel Y. Non-isothermal Soil Water Transport and Evaporation. Advances in Water Resources. 2005, no. 28, pp. 1254—1266.

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Particular aspects of research into application of trench barriers aimed at reductionof the energy of surface waves in the soil

  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Negahdar Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 98-104

Soil vibration represents a problem endangering buildings and structures. Waves propagate through the soil and interact with buildings. Their interaction may cause damage to nearby structures. Horizontal Rayleigh waves or any other waves generated by dynamic loads are considered in this paper. The soil medium is assumed to be linear, elastic, homogeneous and isotropic. The energy associated with any surface waves can be absorbed and damped by the barriers due to geometric and material damping. Application of wave barriers as a method of isolation of structures and foundations from vibrations transmitted in the soil enjoys moderate success. In this research, various open and in-filled trenches used as wave barriers are studied. For this purpose, an extensive parametric analysis has been completed using FLAC-2D software. The findings have proven the efficiency of wave barriers if used in the presence of the structure and applied to suppress the effect of impulse loading on the soil surface. The findings demonstrate that the proposed system composed of the in-filled trench and the structure performs well, as it efficiently reduces the energy of surface waves, although the findings have some exceptions. The discrepancy between the findings of the authors and other researchers may be explained by a different type of load and the presence of a structure.

DOI: 10.22227/1997-0935.2013.3.98-104

References
  1. Musaev V.K. Reshenie zadachi difraktsii i rasprostraneniya uprugikh voln metodom konechnykh elementov [Resolving the Problem of Diffraction and Propagation of Elastic Waves Using Method of Finite Elements]. Stroitel’naya mekhanika i raschet sooruzheniy [Structural Mechanics and Analysis of Structures]. 1990, no. 4, pp. 74—78.
  2. Musaev V.K. Structure Design with Seismic Resistance Foundations. Proceedings of the Ninth European Conference on Earthquake Engineering. Moscow, TsNIISK Publ., 1990, no. 4A, pp. 191—200.
  3. Kuznetsov S.V., Nafasov A.E. Gorizontal’nye seysmicheskie bar’ery dlya zashchity ot seysmicheskikh voln [Horizontal Seismic Barriers as Protection from Seismic Waves]. Vestnik MGSU [Proceeding of Moscow State University of Civil Engineering]. 2010, no. 4, pp. 131—134.
  4. Kuznetsov S.V. Seysmicheskie volny i seysmicheskie bar’ery [Seismic Waves and Seismic Barriers]. Akusticheskaya fizika [Acoustic Physics]. 2011, no. 57, pp. 420—426.
  5. Musaev V.K. Problem of the Building and the Base Interaction under Seismic Loads. Proceedings of the 12th World Conference on Earthquake Engineering. 2741. Auckland, University of Canterbury, 2000, pp. 1—6.
  6. Musaev V.K. Otsenka vliyaniya vzryvov na ob”ekty geotekhniki s pomoshch’yu polostey [Using Cavities to Assess Influence of Explosions on Objects of Geotechnics]. Geotekhnicheskie problemy megapolisov. Tr. Mezhdunar. konf. po geotekhnike [Geotechnical Problems of Megalopolises. Works of the International Geotechnics Conference]. Moscow, PI «Georekonstruktsiya» Publ., 2010, pp. 1733—1740.
  7. Musaev V.K. O dostovernosti rezul'tatov chislennogo metoda resheniya slozhnykh zadach volnovoy teorii uprugosti pri udarnykh, vzryvnykh i seysmicheskikh vozdeystviyakh [On Reliability of Results Generated Using the Numerical Method of Resolution of Complex Problems of the Wave Theory of Elasticity in the Event of Impacts, Explosions and Seismic Loads]. Uchenye zapiski Rossiyskogo gosudarstvennogo sotsial’nogo universiteta [Academic Works of the Russian State Social University]. 2009, no. 5, pp. 21—33.

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Efficiency of trench barriers used to protect structures from dynamic loads and studyof the stress — strain state of soils based on strain hardeningand elastic models

  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Negahdar Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 105-113

Wave barriers are intended to mitigate vibration transmission in the soil. They include open and infilled trenches, sheet piles, etc. In this study, a two-dimensional finite difference element analysis was performed using FLAC-2D software as a research into the efficiency of open and infilled barriers exposed to dynamic loading with or without the presence of structures. In this contribution, two constitutive models are considered to study the soil response in the elastic and elastoplastic range with account for yield, failure and potential functions of soil plasticity. The results were assessed with account for reduced soil particle displacements on the ground surface exposed to impulse loading.The numerical analysis has proven that the results obtained by assigning elastic properties to the soil material fail to comply with the results obtained by analyzing the model having non-linear properties of soils. The presence of a structure produces a significantly larger effect onto the efficiency of barriers by reducing the surface wave energy.

DOI: 10.22227/1997-0935.2013.3.105-113

References
  1. Barkan D.D. Dynamics of Bases and Foundations. McGraw-Hill Book Company Inc., 1962, pp. 374—406.
  2. Al-Hussaini T.M. and Ahmad S. Numerical and Experimental Studies on Vibration Screening by Open and Infilled Trench Barrier. International Workshop on Wave Propagation, Moving Load and Vibration Reduction. Brookfield, 2000, pp. 241—250.
  3. Musaev V.K., Kurantsov V.A. O razrabotke metodiki rascheta sooruzheniy neglubokogo zalozheniya pri vnutrennikh vzryvnykh volnovykh vozdeystviy [Development of Methodology of Analysis of Shallow Foundation Structures Exposed to Internal Explosive Wave Impacts]. Vestnik Rossiyskogo universiteta druzhby narodov. Seriya problemy kompleksnoy bezopasnosti. [News Bulletin of Russian Peoples’ Friendship University. Comprehensive Safety Problems Series]. 2008, no. 1, pp. 75—76.
  4. Musaev V.K., Sazonov K.B. Chislennoe modelirovanie bezopasnosti sooruzheniy neglubokogo zalozheniya pri vneshnikh vzryvnykh vozdeystviyakh [Numerical Modeling of Safety of Shallow Foundation Structures Exposed to External Explosive Impacts]. Vestnik Rossiyskogo universiteta druzhby narodov. Seriya problemy kompleksnoy bezopasnosti. [News Bulletin of Russian Peoples’ Friendship University. Comprehensive Safety Problems Series]. 2008, no. 3, pp. 6—13.
  5. Musaev V.K. Komp’yuternoe modelirovanie bezopasnosti okruzhayushchey sredy s pomoshch’yu polostey pri vzryvnykh vozdeystviyakh v sooruzheniyakh neglubokogo zalozheniya [Computer Simulation of Environmental Safety Using Cavities in Case of Exposure of Shallow Foundation Structures to Explosions] Bezopasnost’ i ekologiya tekhnologicheskikh protsessov i proizvodstv. Materialy Vserossiyskoy nauchno-prakticheskoy konferentsii. Poselok Persianovskiy Rostovskoy oblasti. [Safety and Ecology of Manufacturing and Production Processes. Works of the All-Russian Scientific and Practical Conference. Persianovskiy Settlement, Rostov Region.] Donskoy gosudarstvennyy agrarnyy universitet [Don State University of Agriculture]. 2009, pp. 110—115.
  6. Orekhov V.V., Negakhdar Kh. Nekotorye aspekty izucheniya primeneniya transheynykh bar’erov dlya umen’sheniya energii poverkhnostnykh voln v grunte [Particular Aspects of Research into Application of Trench Barriers Aimed at Reduction of the Surface Wave Energy in the Soil]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 1, pp. 98—104.

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RESEARCH OF BUILDING MATERIALS

New generation waterproofing materials containing vollastonite-basedantigidron system

  • Bezrukov Aleksey Vladimirovich - Moscow State University of Civil Engineering (MGSU) Deputy Director, Centre for Research into construction, design and technology of subterranean structures; postgraduate student, Department of Construction Materials, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Lyapidevskiy Boris Vasil’evich - GUP «NIIMosstroy» (State Unitary Enterprise Scientific and Research Institute of Construction in Moscow) Candidate of Technical Sciences, Director, Centre for Research into construction, design and technology of subterranean structures, GUP «NIIMosstroy» (State Unitary Enterprise Scientific and Research Institute of Construction in Moscow), 8 Vinnitskaya St., Moscow, 119192, Russian Federation.
  • Oreshkin Dmitriy Vladimirovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Chair, Department of Construction Materials; +7 (499) 183-32-29., Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 114-119

Major penetrating waterproofing mixtures represent dry mixtures of cement and sand having admixtures, or systems of mineral salts, used to block the structure of capillaries and pores of cement mortars and concretes. Thin layers of waterproofing mortars are applied to sufficiently porous surfaces. As a result, the water content is reduced in the course of hardening. This process causes contraction and cracks in the coating.The findings of the research performed by the authors have proven that waterproofing materials containing wollastonite-based Antigidron system comply with each basic requirement applicable to penetrating waterproofing materials, as their admixtures penetrate into the concrete to seal concrete pores and to generate insoluble crystals.The new Antigidron system has the following strengths. Each component of the proposed system is made in Russia. It has efficient operating properties, and its cost is1.5 — 2 times lower than the one of similar products.

DOI: 10.22227/1997-0935.2013.3.114-119

References
  1. Uretskaya E.A., Batyanovskiy E.I. Sukhie stroitel’nye smesi: materialy i tekhnologii. [Dry Construction Mixtures: Materials and Technologies]. Minsk, NPOOO «Strinko» Publ., 2001.
  2. Dergunov S.A., Rubtsova V.N. Modifikatsiya sukhikh stroitel’nykh smesey [Modifying Dry Construction Mixtures]. Sovremennye tekhnologii sukhikh smesey v stroitel’stve «MixBUILD». Sb. dokladov 6-oy Mezhdunar. nauch.-tekhn. konf. [Modern Technologies for Dry Mixtures in Civil Engineering «MixBUILD». Collected works of the 6th International Scientific and Technical Conference]. St.Petersburg, 2004.
  3. Vikdorovich A.M. Produktsiya Dow Chemical dlya industrii stroitel’nykh materialov [Dow Chemical Products for the Industry of Construction Materials]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 10—12.
  4. Meshkov P.I., Mokin V.A. Sposoby optimizatsii sostavov sukhikh stroitel’nykh smesey [Methods of Optimization of Compositions of Dry Construction Mixtures]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 12—14.
  5. Uretskaya E.A., Zhukova N.K., Filipchik Z.I. Preimushchestva polimermineral’nykh sukhikh smesey i sovremennye konstruktivno-tekhnologicheskie sistemy zdaniy i stroitel’nye materialy [Strengths of Mineral Polymeric Dry Mixtures and Advanced Structural Systems of Buildings and Construction Materials]. Sbornik trudov BelNIIS [Collected works of Belarus Scientific and Research Institute of Civil Engineering]. Minsk, 1997, pp. 71—73.
  6. Uretskaya E.A., Zhukova N.K., Filipchik Z.I. Modifitsirovannye sukhie stroitel’nye «Polimiks» v sovremennom stroitel›stve [Polymix Modified Dry Construction Mixtures in Contemporary Civil Engineering]. Stroitel’nye materialy [Construction Materials]. 2000, no. 5, pp. 36—38.
  7. Biytts R., Lindernau Kh. Khimicheskie dobavki dlya uluchsheniya kachestva stroitel’nykh rastvorov [Chemical Additives to Improve the Quality of Building Mortars]. Stroitel’nye materialy [Construction Materials]. 1999, no. 3, pp. 13—15.
  8. Dergunov S.A., Rubtsova V.N. Modifikatsiya sukhikh stroitel’nykh smesey [Modification of Dry Construction Mixtures]. Sovremennye tekhnologii sukhikh smesey v stroitel’stve «MixBUILD». Sb. dokladov 6-y Mezhdunar. nauch.-tekhn. konf [Modern Technologies for Dry Mixtures in Civil Engineering «MixBUILD». Collected works of the 6th International Scientific and Technical Conference]. St.Petersburg, 2004, pp. 30-35.
  9. Meshkov P.I., Mokin V.A. Ot gartsovki — k modifitsirovannym sukhim smesyam [From Lime and Sand Mixtures to Modified Dry Mixtures Stroitel’nye materialy [Construction Materials]. 1999, no. 3, pp. 34—35.
  10. Korneev V.I., Zozulya P.V. Slovar’ «Chto» est› «chto» v sukhikh stroitel›nykh smesyakh [Dictionary of Dry Construction Mixtures]. St. Petersburg, NP «Soyuz proizvoditeley sukhikh stroitel’nykh smesey» publ., 2004, 312 p.

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Influence of wollastonite on the mechanical strength of the cement stonemade of portland cement clinker

  • Berdov Gennadiy Il’ich - Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin) Doctor of Technical Sciences, Professor, Department of Construction Materials and Specialized Technologies; +7 (913) 769-18-59, Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin), 113 Leningradskaya St., Novosibirsk, 630008, Russian Federation.
  • Il’ina Liliya Vladimirovna - Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin) Doctor of Technical Sciences, Professor, Department of Construction Materials and Specialized Technologies, Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin), 113 Leningradskaya St., Novosibirsk, 630008, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Rakov Mikhail Andreevich - Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin) postgraduate student, Department of Construction Materials and Specialized Technologies, Sibstrin Novosibirsk State University of Architecture and Civil Engineering (NGASU Sibstrin), 113 Leningradskaya St., Novosibirsk, 630008, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Oreshkin Dmitriy Vladimirovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Chair, Department of Construction Materials; +7 (499) 183-32-29., Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 120-126

The authors have completed a research into the influence of wollastonite onto the strength of the cement stone, if the latter is freshly made or stored in the humid environment for four months. The authors believe that the optimal share of the wollastonite admixture is equal to 5…9 %.The strength of wollastonite-free clinker samples is not reduced, if the clinker is stored in the humid environment and exposed to heat and moisture treatment. Upon the expiry of the 28-days’ curing period, the strength of samples is down by 4 % in the regular environment. In this case, the wollastonite admixture (7 %) improves the strength of samples upon the expiry of the 28 days’ curing period and their strength goes up by28 %, while the strength of samples goes up by 17 % upon their exposure to heat and moisture treatment.The authors believe that the influence produced by wollastonite may be explained by the following reasons. In the event that freshly milled powder (clinker) is added, wollastonite produces its influence on the hydration process, as formation of new compounds (hydrates) is influenced by a strong adsorption field of wollastonite particles.If clinker is stored in the humid environment, its substantial share is subject to hydration and carbonization.

DOI: 10.22227/1997-0935.2013.3.120-126

References
  1. Ramachandran V.S., editor. Dobavki v beton [Concrete Admixtures]. Moscow, Stroyizdat Publ., 1988, 575 p.
  2. Kuznetsova T.V., Kuryashov I.V., Timashev V.V. Fizicheskaya khimiya vyazhushchikh materialov [Physical Chemistry of Binders]. Moscow, Vyssh. shk. publ., 1989, 384 p.
  3. Tsimermanis. L.–Kh.B. Termodinamika vlazhnostnogo sostoyaniya tverdeniya stroitel’nykh materialov [Thermodynamics of the Humid Condition in the Course of Curing of Construction Materials]. Riga, ZINATNE Publ., 1989, 247 p.
  4. Vest A. Khimiya tverdogo tela. Teoriya i prilozheniya. Ch. 1 [Solid Body Chemistry. Theory and Applications. Part 1.] Moscow, Mir Publ., 1988, 558 p.
  5. Volzhenskiy A.V., Burov Yu.S., Kolokol’nikov V.S. Mineral’nye vyazhushchie veshchestva [Mineral Binders]. Moscow, Stroyizdat Publ., 1979, 476 p.
  6. Kolbasov V.M., Leonov I.I., Sulimenko L.M. Tekhnologiya vyazhushchikh materialov [Technology of Binders]. Moscow, Stroyizdat Publ., 1987, 432 p.
  7. Il’ina L.V. Povyshenie ekspluatatsionnykh kharakteristik stroitel’nykh materialov na osnove tsementa dlitel’nogo khraneniya [Improvement of Performance Characteristics of Construction Materials Made of Long-storage Cement]. Novosibirsk, 2011, 351 p.
  8. Gorchakov G.I., Bazhenov Yu.M. Stroitel’nye materialy [Construction Materials]. Moscow, Stroyizdat Publ., 1986, 688 p.
  9. Berdov G.I., Il’ina L.V. Aktivatsiya tsementov deystviem mineral’nykh dobavok [Activation of Cements by Mineral Admixtures]. Mezhdunarodnyy zhurnal prikladnykh i fundamental’nykh issledovaniy [International Journal of Applied and Fundamental Research]. 2010, no. 9, pp. 55—58.

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Service durabilityof chrysolite-cement pipes

  • Zhukov Aleksey Dmitrievich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Composite Materials Technology and Applied Chemistry, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Neyman Svetlana Markovna - NO «Khrizotilovaya assotsiatsiya» Candidate of Technical Sciences, Senior Researcher, Secretary, Council for Technology and Economy, NO «Khrizotilovaya assotsiatsiya», 7 Promyshlennaya St., Asbest, Sverdlovsk Region, 624266, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Radnaeva Svetlana Zhamsoevna - East Siberian State University of Technology and Management (VSGUTU) Senior Lecturer, East Siberian State University of Technology and Management (VSGUTU), 40v Klyuchevskaya St., Ulan-Ude, 670013, Buryat Republic, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 127-134

The authors have compiled an overview of the reasons underlying the failures of pipelines, including inadequate selection of pipe materials and their thermal insulation made with no account for the operating conditions, high rate of wear and tear of steel pipelines due to steel corrosion, high cost of protection of steel pipes from the aggressive influence of the external and internal environment, failure to implement any pipe protection actions, use of insufficient thermal protection insulation, insufficient funding causing failure to restore, restructure or upgrade heating networks.The authors have substantiated the use of chrysolite-cement pipelines within the heating networks of rural areas. Chrysolite-cement pipes may expediently substitute metal pipes in the course of construction and restructuring of pipelines. New metal-free pipelines, namely, those made of cross-linked polyethylene, glass-basalt-plastic and other composite materials, are too expensive; besides, their durability and environmental safety need to be checked.Chrysolite-cement pipes have the following advantages over steel pipes: high corrosion resistance, high resistance to hot water, low values of temperature-driven deformations preventing installation of compensators, low heat conductivity reducing the need for thermal insulation, low laboriousness of installation, low installation and maintenance costs.

DOI: 10.22227/1997-0935.2013.3.127-134

References
  1. Zhukov A.D., Neyman S.M, Babich V.A., editors. Khrizotiltsementnye stroitel’nye materialy [Chrysolite-cement Construction Materials]. Ekaterinburg, AMB Publ., 2009, 155 p.
  2. Ivanov V.V., Soldatova Yu.V., Chemyakina N.A. Rasshirenie oblastey primeneniya korotkovolnistogo khrizotila [New Areas of Application of Short-fibred Chrysolite]. Stroitel’nye materialy [Construction Materials]. 2006, no. 11, pp. 57—59.
  3. Chesnokov V.S., Babich V.A. Khrizotiltsementnye napornye truby: praktika primeneniya v teplotrassakh [Chrysolite-cement Pressure Pipes: Practical Application in Heating Mains]. Stroitel’nye materialy [Construction Materials]. 2008, no. 9, pp. 13—15.
  4. Ryskin M.V. Asbest v mirovoy ekonomike [Asbestos in the International Economy]. Moscow, Mezhdunarod. otnosheniya publ., 1969, 250 p.
  5. Chesnokov V.S., Babich V.A. Asbestotsementnye truby: pochemu ikh ignoriruyut [Asbestos-cement Pipes: Why Are They Ignored?] Prom. vedomosti [Industrial News]. 2007, no. 5–6, pp. 5—7.
  6. Neyman S.M., Vezentsev A.I., Kashanskiy S.V. O bezopasnosti asbestotsementnykh materialov i izdeliy [Safety of Asbestos-cement Materials and Products]. Moscow, OOO RI F «Stroymaterialy» publ., 2006, 64 p.
  7. Izmerov N.F., Kovalevskiy E.V. Normativnoe obespechenie kontroliruemogo ispol'zovaniya asbestosoderzhashchikh materialov v stroitel›stve [Regulatory Framework for the Controlled Use of Asbestos-based Materials in Civil Engineering]. Meditsina truda i prom. ekologiya [Occupational Medicine and Industrial Ecology]. 2004, no. 5, pp. 5—12.
  8. Sokolov P.N. Proizvodstvo asbestotsementnykh izdeliy [Manufacturing of Asbestos-cement Products]. Moscow, Vyssh. shk. publ., 1970, 288 p.
  9. Kim B.I., Litvin I.E. Zadachnik po mekhanike gruntov v truboprovodnom stroitel’stve [Problem Book on Soil Mechanics in Pipeline Engineering]. Moscow, Nedra Publ., 1989, 180 p.

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X-ray phase analysisof the filler composition based on W B – FeCr – FeV

  • Kyazymov Fuzuli Agababaevich - OAO MZKO «Krasnyy Oktyabr’» (Red October Volgograd Steel Works) Process Engineer, OAO MZKO «Krasnyy Oktyabr’» (Red October Volgograd Steel Works), 110 pr. Lenina, Volgograd, 400007, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Popov Pavel Vladimirovich - Volzhskiy Institute of Humanities, Branch of Volgograd State University (VolGU) Candidate of Technical Sciences, Associate Professor, Department of Applied Mathematics and Computer Science, Volzhskiy Institute of Humanities, Branch of Volgograd State University (VolGU), 11, 40 Let Pobedy str., Volzhskiy, Volgograd Region, 404133, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 135-139

The authors believe that development of wear resistant coating compositions basedon W Bis an important task aimed at improvement of durability of working parts of2 2machines. X-ray analysis of coating composition W B – FeCr – FeV is presented in the2 2article. The results of chemical and X-ray analyses of the coating composition comprisingW B – FeCr – 10 % FeV demonstrate that, when the weld metal formed, W Bpartially2 5 2 5dissociates to form borides, vanadium, iron, and chromium. High iron content in thesolid solution causes reduction of its hardness and wear resistance. A 20 % increase in the tungsten boride content leads to formation of elongated grains in the matrix of ironborides, vanadium and chromium borides. A composition containing 4 % of W Bhas a2 5fine-grained structure, and it is characterized by the absence of FeB in the weld metal,and its absence means lower brittleness. In the metal, carbon borides are formed to assure its high hardness. In the matrix, a significant amount of vanadium and chromium is dissolved to help improve its hardness. The study shows that the composition containing40 % of W Bhas a fine-grained structure, and it is characterized by the absence of FeB2 5in the weld metal. Therefore, the coating layer demonstrates the highest resistance toabrasion.

DOI: 10.22227/1997-0935.2013.3.135-139

References
  1. Gustov Yu.I., Popov P.V., Kyazymov F.A. Issledovanie vliyaniya borida vol’frama na strukturu i svoystva naplavlennogo metalla [Research into the Influence of Tungsten Boride onto the Structure and Properties of the Filler Metal]. Novoe v metallovedenii. Sbornik nauchnykh trudov. [Novelties in the Metal Science. Collection of Scientific Works.]. Moscow, MGSU Publ., 2007, pp. 51—53.
  2. Kosolapova T.Ya., editor. Svoystva, poluchenie i primenenie tugoplavkikh soedineniy [Properties, Extraction and Application of Refractory Compounds]. Moscow, Metallurgiya Publ., 1986, 928 p.
  3. Kyazymov F.A., Oreshkin V.D., Popov P.V. Abrazivnaya iznosostoykost’ kompozitsionnykh materialov na osnove W2B5 [Abrasive Wear Resistance of Composite Materials Based on W2B5]. Novye perspektivnye materialy i tekhnologii ikh polucheniya NPM — 2007. Sb. tr. [New Materials and Technologies for Their Generation NPM-2007. Collection of Works]. Volgograd, VGTU Publ., 2007, pp. 175—176.
  4. Kyazymov F.A., Oreshkin V.D., Popov P.V. Vliyanie sily toka na strukturu naplavochnogo materiala W2B5 – FeCr – FeV [Influence of Current Intensity on Structure of Filler Material W2B5 – FeCr – FeV]. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta. Mezhvuz. sb. nauch. statey [News of Volgograd State Technical University. International Collection of Research Papers]. 2009, no. 11(59), pp. 69—70.
  5. Kyazymov F. A., Popov P.V. Khimicheskiy analiz naplavochnoy kompozitsii na osnove W2B5 [Chemical Analysis of the Filler Composition Based on W2B5]. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta. Mezhvuz. sb. nauch. statey. [News of Volgograd State Technical University. International Collection of Research Papers]. 2010, no. 4(64), pp. 81—83.
  6. Skudnov V.A. Zakonomernosti predel’noy udel’noy energii deformatsii — osnovnoy sinergeticheskoy (kooperativnoy) kharakteristiki razrusheniya i rabotosposobnosti metallov [Regularities of the Limit Unit Energy of Deformations as the Principal Synergetic (Cooperative) Characteristic of Destruction and Serviceability of Metal]. Materialovedenie i metallurgiya. Trudy NGTU. [Material Science and Metallurgy. Works of Nizhegorodskiy State Technical University]. Nizhniy Novgorod, 2004, vol. 42, pp. 94—101.
  7. Gustov Yu.I. Sinergeticheskie kriterii metallov [Synergetic Criteria of Metals]. Novoe v metallovedenii. Sb. nauch. tr. [Novelties in the Metal Science. Collection of Research Works.] Moscow, MGSU Publ., 2007, pp. 3—9.

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Fibre concrete havinga nanodisperse silica additive

  • Matveeva Elena Gennad’evna - Bryansk State Academy of Engineering and Technology (BGITA) Candidate of Technical Sciences, assistant lecturer, Department of Production of Structural Units, Bryansk State Academy of Engineering and Technology (BGITA), 3 pr. Stanke Dimitrova, Bryansk, 241037, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Koroleva Elena Leonidovna - Bryansk State Academy of Engineering Technology (BSAET) Candidate of Technical Sciences, Associate Professor, Department of Production of Building Structures, Bryansk State Academy of Engineering Technology (BSAET), 3 prospekt St. Dimitrova, 241037, Bryansk, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 140-145

The objective of the project described in this article was to design the fiber concrete having an optimized structure and high strength characteristics. In the course of the project development, the fibre concrete was modified by the nanodisperse silica additive. As a result, the authors designed several modified fibre concrete compositions having optimal physical and mechanical properties. Electronic microscope Quanta 200 3D was used to study the microstructure of samples. Diffractometer ARL X’TRA was used to perform the X-ray analysis of samples. Selection of the optimal composition of the concrete was performed using the orthogonal experimental design technique. The nanodisperse silica additive was synthesized using method of chemical polycondensation followed by subsequent stabilization of acetate. This super-plasticizer improves the density and strength properties of the composite. Experimental and statistical models were generated as regression equations to determine the optimal composition of the fibre concrete.

DOI: 10.22227/1997-0935.2013.3.140-145

References
  1. Perfilov V.A., Atkina V.A., Kusmartseva O.A. Fibrobetony s vysokodispersnymi voloknistymi napolnitelyami [Fibre Concretes Having Fine-grained Fibre Fillers]. “Maloetazhnoe stroitel’stvo” v ramkakh Natsional’nogo proekta “Dostupnoe i komfortnoe zhil’e grazhdanam Rossii”; tekhnologii i materialy, problemy i perspektivy razvitiya v Volgogradskoy oblasti. Mezhdunar. nauch.-prakt. konf. [Low-rise Construction within the Framework of Affordable and Comfortable Housing for Russian Citizens National Project. Technologies and Materials, Problems and Prospects for Development of the Volgograd Region. An International Scientific and Practical Conference]. Volgograd, VolgGASU Publ., 2009, pp. 89—91.
  2. Rabinovich F.N. Dispersno-armirovannye betony [Fibre-reinforced Concretes]. Moscow, Stroyizdat Publ., 1989, 176 p.
  3. Rabinovich F.N. O nekotorykh osobennostyakh raboty kompozitov na osnove dispersno-armirovannykh betonov [Particular Behaviour of the Composites Containing Fibre-reinforced Concretes]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1998, no. 6, pp. 19—23.
  4. Bischoff P.H., Perry S.H. Compressive Behaviour of Concrete at High Strain Rates. Materials and Structures. 1991, vol. 24, pp. 425—450.
  5. Malvar L.J., Crawford J.E. Dynamic Increase Factors for Concrete. Twenty-Eighth DDESB Seminar. Orlando, FL, August 1998.
  6. Akopov F., Bragov A.M., Demenko P., Kruszka L., Lomunov A.K., Mineev V., Sergeichev L.V. Static and Dynamic Response of Ceramics and Zirconium Alumina Concrete Materials. Journal de Physique IV. France, 2003, vol. 110, pp. 225—230.
  7. Klepaczko J.R. On a Very High Rate Sensitivity of Concrete Failure at High Loading Rates and Impact. Proc. Int. Symp. Brittle Matrix Composites 7, Warsaw, 2003, pp. 1—27.
  8. Chujie Jiao, Wei Sun, Shi Huan, Guoping Jiang. Behavior of Steel Fiber-reinforced High-strength Concrete at Medium Strain Rate. Front. Archit. Civ. Eng. China, 2009, vol. 3, no. 2, pp. 131—136.
  9. Kolsky H. An Investigation of the Mechanical Properties of Material at Very High Rates of Loading. Proc. Phys. Soc. London, 1949, vol. 62B, pp. 676—700.
  10. Campbell J.D., Dowling A.R. The Behaviour of Materials Subjected to Dynamic Incremental Shear Loading. J. Mech. Phys. Solids. 1970, vol.18, pp. 43—63.
  11. Dharan C.K.H., Hauser F.E. Determination of Stress-strain Characteristics at Very High Strain Rates. Exp. Mech. 1970, vol.10, pp. 370—376.
  12. Nicholas T. Tensile Testing of Materials at High Rates of Strain. Exp. Mech. 1981, vol. 21, no. 5, pp. 177—195.

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Calculation of average sizes of oligomersin case of equilibrium polycondensation

  • Moskalets Aleksandr Petrovich - Moscow State University of Civil Engineering (MGSU) Candidate of Physical and Mathematical Sciences, Associate Professor, Department of Polymeric Construction Materials and Applied Chemistry, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 146-154

Experimental and theoretical research into polymeric solutions and melts obtained in the condition of equilibrium condensation requires a theoretical size-distribution function to be identified. The author presents his solution to this problem using generating functions, although no Gaussian statistics of polymer chains is employed.Method of branching processes proposed by Gordon is a common way to consider configurational statistics of branched polymers that allows researchers to obtain generating functions in a simple way. Unfortunately, this method cannot be directly applied to non-ideal chains, while effects of hindrances of rotating round bonds between two monomers may be of significant importance in terms of experimental data interpretation. The author presents a new method based on the mathematical theory of formal context-free grammar applicable to non-commutative objects, like matrices. The proposed method combined with the Flory’s approach was applied to tree-like polymers with hindered rotation and analytical expressions to derive generating functions.

DOI: 10.22227/1997-0935.2013.3.146-154

References
  1. Flory P. Statisticheskaya mekhanika tsepnykh molekul [Statistical Mechanics of Chain Molecules]. Moscow, Mir Publ., 1971, 440 p.
  2. Kuchanov S.I., Korolev S.V., Panyukov S.V. Grafy v khimicheskoy fizike polimerov [Graphs in Chemical Physics of Polymers]. In Zefirov N.S. Primenenie teorii grafov v khimii [Application of Theory of Graphs in Chemistry]. Novosibirsk, Nauka Publ., 1988, pp. 144—299.
  3. Kuchanov S., Slot H., Stroeks A. Development of a Quantitative Theory of Polycondensation. Prog. Polym. Sci. 2004, vol. 29, pp. 563—633.
  4. Lando S.K. Lektsii o proizvodyashchikh funktsiyakh [Lectures on Generating Functions]. Moscow, MTsNMO Publ., 2007, 144 p.
  5. Ba X., Wang H., Zhao M., Li M. Conversion Dependence of the Average Mean-square Radii of Gyration for Hyperbranched Polymers Formed by ABg Type Monomers. Macromolecules. 2002, vol. 35, no. 8, pp. 3306—3308.
  6. Costa M.R.P.F.N., Dias R.C.S. Prediction of Mean Square Radius of Gyration of Tree-like Polymers by a General Kinetic Approach. Polymer. 2007, vol. 48, pp. 1785—1801.
  7. Zhao Z.-F., Wang H.-J., Ba X.-W. A Statistical Theory for Self-condensing Vinyl Polymerization. J. Chem. Phys. 2009, vol. 131, 074101.
  8. Ba X., Han Y., Wang H., Tian Y., Wang S. Conversion Dependence of the Mean Size of the Star-branched Polymers Made by AB+Af Type Polycondensation. Macromolecules. 2004, vol. 37, p. 3470.
  9. Bonchev D., Markel E.J., Dekmezian A.H. Long Chain Branch Polymer Chain Dimensions: Application of Topology to the Zimm-Stockmayer Model. Polymer. 2002, vol. 43, pp. 203—222.
  10. Nakao T., Tanaka F., Kohjiya S. New Cascade Theory of Branched Polymers and Its Application to Size Exclusion Chromatography. Macromolecules. 2006, vol. 39, pp. 6643—6652.

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Study of the properties of fine-grained concrete modifiedby the nanodisperse serpentinite additive

  • Pustovgar Andrey Petrovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Director, Research and Scientific Institute for Construction Materials and Technologies, Professor, Department of Construction of Nuclear Installations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Lukuttsova Natal’ya Petrovna - Federal State Educational Institution of Higher Education Bryansk State Technological University of Engineering Doctor of Technical Sciences, Professor, chair, Department of Building Structures Production, Federal State Educational Institution of Higher Education Bryansk State Technological University of Engineering, prospekt Stanke Dimitrova str., Bryansk, 241037, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ustinov Aleksandr Gennad’evich - Bryansk State Academy of Engineering and Technology (BGITA) postgraduate student, Department of Production of Structural Units, Bryansk State Academy of Engineering and Technology (BGITA), 3 pr. Stanke Dimitrova, Bryansk, 241037, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 155-162

The purpose of the research consists in development of a nano-sized additive containing mineral serpentinite designated for fine-grained concretes. In this article, the results of research into the influence of nanodisperse mineral serpentinite additives on physical-mechanical properties of fine-grained concrete are provided.Nano-sized particles are obtained by the milling of serpentinite together with C-3 plasticizer, the content of which is equal to 1 % of the mass of serpentine, and the milling time is 30 min. Milled nano-sized particles are dispersed in the water environment using the ultrasonic technology. The ultrasonic treatment frequency is 35 KHz, and the exposure time varies from 15 to 60 min.The study of the effect of the nanodisperse additive is performed using samples of fine-grained concretes made of white-color cement and quartz sand and hardened according to the regular procedure.If the concentration of serpentinite is equal to 0.01 % and the additive is obtained by the 15-minute exposure to ultrasonic dispersion, the 0.15 % content of the nanodisperse additive added to the fine concrete improves the compressive strength 1.5-fold, the bending strength — 1.3-fold, and improves the average density by 8%, while the water absorption rate goes down 1.7-fold. Resulting strength properties comply with the structure of cement identified with the help of an electronic microscope.

DOI: 10.22227/1997-0935.2013.3.155-162

References
  1. Paffengol’ts K.N. Geologicheskiy slovar’ [Dictionary of Geology]. Moscow, Nedra Publ., 1978.
  2. Shuman V. Mir kamnya. Gornye porody i mineraly [World of Stones. Rock and Minerals]. Moscow, Mir Publ., 1986, pp. 134.
  3. Lukuttsova N.P., Pykin A.A., Chudakova O.A. Modifitsirovanie melkozernistogo betona mikro- i nanorazmernymi chastitsami shungita i dioksida titana [Modifying Fine-grained Concrete by Micro- and Nano-sized Particles of Schungite and Titanium Dioxide]. Vestnik BGTU im. V.G. Shukhova [Proceedings of Bryansk State Technical University named after V.G. Shukhov]. 2010, no. 2, pp. 67—70.
  4. Lukuttsova N.P. Nanomodifitsiruyushchie dobavki v beton [Nano-modifying Concrete Additives]. Stroitel’nye materialy [Construction Materials]. 2010, no. 9, pp. 101—104.
  5. Bazhenov Yu.M., Lukuttsova N.P., Matveeva E.G. Issledovanie nanomodifitsirovannogo melkozernistogo betona [Research into Nano-modified Fine-grained Concrete]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 4, vol. 2, pp. 415—418.
  6. Korolev E.V., Kuvshinova M.I. Parametry ul’trazvuka dlya gomogenizatsii dispersnykh sistem s nanorazmernymi modifikatorami [Parameters of the Ultrasound Used for Homogenization of Disperse Systems Having Nano-sized Modifiers]. Stroitel’nye materialy [Construction Materials]. 2010, no. 9, pp. 85—88.
  7. Lukuttsova N.P., Chudakova O.A., Khotchenkov P.V. Stroitel’nye rastvory s nanodispersnoy dobavkoy dioksida titana [Building Mortars Having a Nanodisperse Titanium Dioxide Additive]. Stroitel’stvo i rekonstruktsiya [Construction and Restructuring]. 2011, no. 1, pp. 66—69.
  8. Lukuttsova N.P., Akhremenko S.A., Pykin A.A., Degtyarev E.V. Analiz effektivnosti i ekologicheskoy bezopasnosti tekhnologii polucheniya nanomodifitsiruyushchey dobavki dlya betonov [Analysis of Efficiency and Safety of Technology of Recovery of a Nano-modifying Concrete Additive]. Biosfernosovmestimye goroda i poseleniya. Materialy nauch.-prakt. konf. [Towns and Settlements Compatible with the Biosphere. Works of the Scientific and Practical Conference]. Bryansk, BGITA Publ., 2012, pp. 82—88.

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SAFETY OF BUILDING SYSTEMS. ECOLOGICAL PROBLEMS OF CONSTRUCTION PROJECTS. GEOECOLOGY

Principles of waste management planning exemplifiedby the actions implemented in the Republic of Dagestan

  • Koretskiy Vladimir Evgen’evich - MosvodokanalNIIproject Institute (MosvodokanalNIIproject) Doctor of Technical Sciences, Deputy General Director; +7 (499) 263-01-39, MosvodokanalNIIproject Institute (MosvodokanalNIIproject), 22 Pleteshkovskiy Pereulok, Moscow, 105005, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Mal’tseva Svetlana Sergeevna - MosvodokanalNIIproject Institute (MosvodokanalNIIproject) Group Leader, Department for Waste Management Facilities Design; +7 (499) 261-77-62, MosvodokanalNIIproject Institute (MosvodokanalNIIproject), 22 Pleteshkovskiy Pereulok, Moscow, 105005, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 163-173

Solid household waste management plans are developed to provide for the vital needs of local residents, to take care of the environment, and to save natural resources. A waste management plan designated for an extensive territory is a project comprising the following elements: the sequence of actions, the scope of waste collection and treatment actions; systems and methods of household waste collection, decontamination and processing; the number of collectors, collection procedure, and items of treatment machinery; the expediency of design, construction, reconstruction or expansion of waste management facilities, their basic specifications and location, as well as the capital investments to be made into construction, purchase and installation of waste management facilities.A waste management plan may be designated for a separate inhabited locality and the whole region. Despite the above, regional plans are preferable. The regional waste management plan analyzed in this article is designated for the territory of the Republic of Dagestan. It was developed by the specialists of MosvodokanalNIIproject in furtherance of the decree issued by the Ministry of Natural Resources of the Republic of Dagestan.The top-priority objectives underlying the plan development included reduction of the overall amount of waste, its toxicity (and other harmful properties), increase in the share of waste recyclable into secondary raw materials, and phasedown of land-filling.Identification of tentative locations of waste processing facilities requires preliminary land use planning, so that several municipal units or a group of settlements were serviced by a certain waste processing facility with account for the local terrain and climate, as well as reasonable waste transfer routes.Waste handling scenarios embrace various advanced technologies and their combinations, as they consider the projected increase in the municipal waste production rate for the term of up to ten years. Selection of the optimum option is to be based on the principle that any waste handling system is to comply with local standards of living and potential fundraising efforts.Any waste management plan designated for a region shall not exceed a term of five years, while projections may embrace up to 10 – 20 years. Any waste management plan developed for a territory may only be implemented in case of a well-coordinated cooperation between waste handling enterprises, local authorities and the local population.

DOI: 10.22227/1997-0935.2013.3.163-173

References
  1. MDK 7-01.2003. Metodicheskie rekomendatsii o poryadke razrabotki general’nykh skhem ochistki territoriy naselennykh punktov Rossiyskoy Federatsii [MDK 7-01.2003. Methodological Recommendations for the Procedure of Development of Master Plans for Waste Management in the Territories of Populated Areas in the Russian Federation]. Moscow, 2003.
  2. Fedorov M.P., Negulyaeva E.Yu. Ekologicheskaya bezopasnost’ pri obrashchenii s otkhodami [Environmental Safety of Waste Management]. IV Mezhdunarodnaya konferentsiya «Akvaterra». [Aquaterra, 4th International Conference]. Sb. materialov konf. [Collected conference works]. November 13—16, 2001, p. 176.
  3. Gonopol’skiy A.M., Rukina I.M., Fedorov O.L. Regional’naya ekonomicheskaya strategiya obrashcheniya s otkhodami [Regional Economic Strategy for Waste Management]. Moscow, MGUIE Publ., 2005, 164 p.
  4. Glukhov V.V. Regional’naya ekologicheskaya situatsiya (Sostoyanie i metodika otsenki) [Regional Economic Situation (Status and Assessment Methodology)]. St.Petersburg, Institut problem regional’noy ekonomiki RAN [Institute of Problems of Regional Economies of the Russian Academy of Sciences]. 2000, 51 p.
  5. Pupyrev E.I., Kremer A.A. Sistemnyy podkhod k resheniyu problemy obrashcheniya s tverdymi bytovymi otkhodami [Systemic Concept of Solid Waste Management]. Chistyy gorod [Clean City]. 2011, no. 4(56), pp. 13—18.
  6. MDS 13-8.2000. Kontseptsiya obrashcheniya s tverdymi bytovymi otkhodami v Rossiyskoy Federatsii [MDS 13-8.2000. Concept for Solid Household Waste Management in the Russian Federation]. Moscow, 2000.
  7. Mirnyy A.N., Murashov V.E., Koretskiy V.E. Gosudarstvennoe upravlenie otkhodami v ramkakh kontseptsii ustoychivogo razvitiya [Waste Management by the Government Authorities within the Framework of Sustainable Development Concept]. Moscow, AKKh im. K.D. Pamfilova Publ., 2012, 351 p.
  8. Pupyrev E.I., Perel’shteyn G.B., Iskhakova S.M., Maksimova A.A. Neobkhodimost’ razvitiya osnovnykh tekhnologiy po pererabotke promyshlennykh i bytovykh otkhodov i puti ikh realizatsii [The Need to Develop Principal Industrial and Household Waste Processing Technologies and Methods of Their Implementation]. Proekty razvitiya infrastruktury goroda. Vyp. 5. Modelirovanie i analiz ob”ektov gorodskikh inzhenernykh system. Sb. nauch. tr. [Urban Infrastructure Development Projects. No. 5. Modeling and Analysis of Items of Urban Engineering Infrastructure. Collection of Scientific Works]. Moscow, Prima-press Ekspo Publ., 2005, pp. 148—152.
  9. Yakovlev V.A., Semin E.G. Kontseptual’nye osnovy vybora tekhnologii pererabotki tverdykh bytovykh otkhodov [Conceptual Fundamentals for Selection of the Solid Household Waste Treatment Technology]. Gorodskoe khozyaystvo i ekologiya [Urban Economy and Ecology]. 1999, no. 1, pp. 50—56.
  10. Pupyrev E.I., Perel’shteyn G.B. Gorodskie inzhenernye zavody [Urban Engineering Facilities]. Proekty razvitiya infrastruktury goroda. Vyp. 7. Tekhnologii razvitiya gorodskogo vodokhozyaystvennogo kompleksa. Sb. nauch. tr. [Urban Infrastructure Development Projects. No. 7. Technologies for Development of Urban Water Treatment Facilities. Collection of Scientific Works.]. Moscow, Prima-press Ekspo Publ., 2007, pp. 195—202.

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Operation of the regenerative ventilation system within an officebuilding having a winter garden

  • Rymarov Andrey Georgievich - Moscow State University of Civil Engineering (MGSU) +7 (499) 188-36-07, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Savichev Vitaliy Valer`evich - Moscow State University of Civil Engineering (MGSU) assistant lecturer, Department of Heating and Venti- lation; +7 (499) 188-36-07, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 174-177

The article represents a description of a regenerative ventilation system operating in an office building having a winter garden. The winter garden has an air recycling system; moreover, plants can absorb carbon dioxide and generate oxygen. The air saturated with carbon dioxide is removed from the premises of the office building into the winter garden; there, it contacts plant leaves; thus, the air is purified and saturated with oxygen. Thereafter, the air is taken from the premises of the winter garden and delivered to the premises of the office building. This way the air is recycled several times a day. The temperature and relative humidity of the air leaving the winter garden are usually above the desired values for a person on the premises of the office building; therefore, they need to be cooled and drained. The temperature and relative humidity of the air delivered from the office building to the winter garden are usually below the values needed for winter garden plants, and they need heating and humidification. The operation of the regenerative system of ventilation does not require any inflow of the outside air to generate the required gas composition of the air environment on the premises.

DOI: 10.22227/1997-0935.2013.3.174-177

References
  1. Rymarov A.G., Savichev V.V. Teplovoi rezhim administrativnogo zdaniya s «zimnim sadom» pri rabote regenerativnoi sistemy ventilyatsii [Thermal Conditions of an Office Building Having a Winter Garden in the Event of Operation of a Regenerative System of Ventilation]. Estestvennye i tehnicheskie nauki [Natural and Technical Sciences]. 2013, no. 1, pp. 383—385.
  2. Rymarov A.G. Prognozirovanie parametrov vozdushnogo, teplovogo, gazovogo I vlazhnostnogo rezhimov pomeshcheniy zdaniya [Prognostication of Parameters of Air, Heat, Gas and Humidity Modes of Premises]. Akademia publ., 2009, no. 5, ðð. 362—364.
  3. Gagarin V.G., Teplofizicheskie problemy sovremennykh stenovykh ograzhdayushchikh konstruktsiy mnogoetazhnykh zdanii [Thermalphysic Problems of Modern Wall Enclosing Structures of Buildings]. Akademia publ., 2009, no. 5, pp. 297—305.
  4. Bodrov V.I. Mikroklimat proizvodstvennykh sel’skokhozyaistvennykh zdaniy i sooruzheniy [The Microclimate inside Buildings and Structures Designated for Agricultural Production Purposes]. Nizhny Novgorod, UNIVERSITY Publ., 2008, 623 p.
  5. Sakr W., Weschler C.J., Fanger P.O. The Impact of Sorption on Perceived Indoor Air Quality. Indoor Air. 2006, vol. 16, no. 2, pp. 98—110.

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Influence of coefficient of transfer of regulators on energyconsumption of automated climatic systems

  • Samarin Oleg Dmitrievich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Assistant Professor, Department of the Heating and Ventilation, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoye shosse, Moscow, 129337, Russian Federa- tion; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Goryunov Igor’ Ivanovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Manager, Automation of Construction Technologies Branch, Department of Information Systems, Technologies and Automation in Construction, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 183-97-80; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Tishchenkova Irina Ivanovna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Information Systems, Technologies and Automation in Construction, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 178-186

The authors argue that efficient energy saving methods installable into civil buildings include energy saving technologies, cost-efficient and fast-payback technologies, improvement of process flowsheets and patterns of microclimate systems, and automation of engineering systems and installations.Processes of unsteady heat exchange inside premises having automated climatic systems are considered in this article. Advanced methods of analysis of thermal modes of premises are provided. Interrelation between separate parameters of thermal stability in a room and automated microclimate control is another subject of research. The formula designated for the calculation of the coefficient of transfer of regulators is derived by the authors.The ultimate result is identified using the methodology of assessment of influenceof dynamic properties of a room produced on the value of K. The proposed methodol-ogy may be used to develop engineering recommendations concerning selection of the optimal operating mode of regulators designated for engineering installations.The conclusion is substantiated by numerical calculations made using specialized software and graphic examples.

DOI: 10.22227/1997-0935.2013.3.178-186

References
  1. Kalmakov A.A., Kuvshinov Yu.Ya., Romanova S.S., Shchelkunov S.A., Bogoslovskiy V.N., editor. Avtomatika i avtomatizatsiya sistem teplogazosnabzheniya i ventilyatsii [Automatic Control Engineering and Automation of Systems of Heat and Gas Supply and Ventilation]. Moscow, Stroyizdat Publ., 1986, 479 p.
  2. Samarin O.D. Teplofizika. Energosberezhenie. Energoeffektivnost’ [Thermal Physics. Energy Saving. Energy Efficiency]. Moscow, ASV Publ., 2011, 296 p.
  3. Isaev S.I., Kozhinov I.A., Kofanov V.I., A.I. Leont’ev, editor. Teoriya teplomassoobmena [Theory of Heat and Mass Exchange]. Moscow, MGTU im. N.E. Baumana publ., 1997, 683 p.
  4. Samarin O.D., Azivskaya S.S. Printsipy rascheta nestatsionarnogo teplovogo rezhima pomeshcheniya, obsluzhivaemogo avtomatizirovannymi sistemami obespecheniya mikroklimata [Principles of Analysis of Unsteady Thermal Mode of Premises Having Automated Microclimate Systems]. Izvestiya vuzov. Stroitel’stvo [News of Institutions of Higher Education. Construction.] 2011, no. 1, pp. 59—62.
  5. Samarin O.D., Fedorchenko Yu.D. Vliyanie regulirovaniya sistem obespecheniya mikroklimata na kachestvo podderzhaniya vnutrennikh meteoparametrov [Influence of Adjustment of Microclimate Systems onto the Quality of Maintenance of Meteorological Parameters inside Premises]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 7, pp. 124—128.
  6. Bogoslovskiy V.N. Stroitel’naya teplofizika (teplofizicheskie osnovy otopleniya, ventilyatsii i konditsionirovaniya vozdukha) [Thermal Physics (Thermalphysic Fundamentals of Heating, Ventilation and Air Conditioning]. St.Petersburg, Avok Severo-zapad publ., 2006, 400 p.
  7. Khashan S.A., Al-Amiri A.M., Pop I. Numerical Simulation of Natural Convection Heat Transfer in A Porous Cavity Heated from below Using a Non-Darcian and Thermal Non-equilibrium Model. International Journal of Heat and Mass Transfer. 2006, vol. 49, no. 5, pp. 1039—1049.
  8. Dounis A.I., Caraiscos C. Advanced Control Systems Engineering for Energy and Comfort Management in a Building Environment. A review. Renewable and Sustainable Energy Reviews. 2009, vol. 13, no. 6, pp. 1246—1261.
  9. Jiangjiang Wang, Zhiqiang (John) Zhai, Youyin Jing, Chunfa Zhang. Influence Analysis of Building Types and Climate Zones on Energetic, Economic and Environmental Performances of BCHP Systems. Applied Energy. 2011, vol. 88, no. 9, pp. 3097—3112.
  10. Michele De Carli, Massimiliano Scarpa, Roberta Tomasi, Angelo Zarrella. DIGITHON: A Numerical Model for the Thermal Balance of Rooms Equipped with Radiant Systems. Building and Environment. 2012, no. 57, pp. 126—144.

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HYDRAULICS. ENGINEERING HYDROLOGY. HYDRAULIC ENGINEERING

Development and substantiation of the structure of a masonry dam havinga soil cement membrane and designated for the climate of the far North of Russia

  • Sainov Mikhail Petrovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Hydraulic Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kotov Filipp Viktorovich - Moscow State University of Civil Engineering (MGSU) assistant, Department of Hydraulic Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 187-195

The Far North of Russia has a strong power generation potential. Future hydraulic power engineering projects may include construction of major power generating plants in south Yakutia. The core elements of the proposed projects will comprise dams about200 meters high.The authors substantiate construction of a masonry dam in severe climatic conditions of the Far Northern region of Russia. The structural solution represents a masonry dam having an impervious element, or a wide internal membrane, made of soil and cement concrete. This element is to protect the soil-free membrane from any thermal effects. The authors provide their analysis of the deflected mode of the dam, if its height is equal to 226 m. The findings have proven that the membrane made of soil and concrete cement will be in the state of compression. Therefore, the authors believe that the proposed design of the dam structure is reliable enough.

DOI: 10.22227/1997-0935.2013.3.187-195

References
  1. Zairova V.A., Filippova E.A., Orishchuk R.N., Sozinov A.D., Radchenko S.V. Vybor protivofil’tratsionnogo ustroystva v variantakh plotin Kankunskogo gidrouzla [Selection of the Membrane Construction in Various Options of Dams of Kankun Hydraulic Power Plant]. Gidrotekhnicheskoe stroitel’stvo [Hydraulic Engineering]. 2010, no. 2, pp. 8—13.
  2. Cooke B. Concrete Face Rockfill Dams. Beijing, 2000, 315 p.
  3. Lyapichev Yu.P. Proektirovanie i stroitel’stvo sovremennykh vysokikh plotin [Design and Construction of Advanced High Dams]. Moscow, RUDN Publ., 2004, 275 p.
  4. Sainov M.P. Osobennosti raschetov napryazhenno-deformirovannogo sostoyaniya kamennykh plotin s zhelezobetonnymi ekranami [Peculiarities of Analysis of the Stress-strain State of Masonry Dams Having Reinforced Concrete Membranes]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2006, no. 2, pp. 78—86.
  5. Sainov M.P. Sovershenstvovanie konstruktsii vysokoy kamennoy plotiny s zhelezobetonnym ekranom [Improvement of the Structure of a High Masonry Dam Having a Reinforced Concrete Membrane]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 5, pp. 36—40.
  6. Nguen Than Dat. Napryazhenno-deformirovannoe sostoyanie kamennykh plotin s zhelezobetonnym ekranom [Deflected Mode of Masonry Dams Having Reinforced Concrete Screens]. Moscow, 2004, 20 p.
  7. Gruntotsement dlya gruntovykh plotin: byulleten’ komiteta po bol’shim plotinam [Soil-cement for Earth-fill Dams: Bulletin of Committee in Charge of Major Dams]. 1986, VNIIG Publ., 55 p.
  8. Monsef Belaid. Ispol’zovanie ukatannogo betona i gruntotsementa v gidrotekhnicheskom stroitel’stve Tunisa [Using Rolled Concrete and Soil-cement in Hydraulic Engineering in Tunisia]. St.Petersburg, 2002, 23 p.
  9. Sainov M.P. Razrabotka i obosnovanie ratsional’noy konstruktsii kamennoy plotiny dlya usloviy Kraynego Severa [Development and Substantiation of the Rational Structure of a Masonry Dam for the Climate of the Far North]. International Journal for Computational Civil and Structural Engineering. 2012, vol. 8, no. 3, pp. 116—120.
  10. Gol’din A.L., Rasskazov L.N. Proektirovanie gruntovykh plotin [Design of Earth-fill Dams]. Moscow, ASV Publ., 2001, 384 p.

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ECONOMICS, MANAGEMENT AND ORGANIZATION OF CONSTRUCTION PROCESSES

Using structural actions to improve organizationaland technological reliability of construction activities

  • Zhavnerov Pavel Borisovich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Information Systems, Technologies and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ginzburg Aleksandr Vital’evich - Moscow State University of Civil Engineering (MGSU) (National Research University) Doctor of Technical Sciences, Professor, chair, Department of Information Systems, Technologies and Automation in Construction, Moscow State University of Civil Engineering (MGSU) (National Research University), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 196-200

The process of construction is a complex probabilistic system characterized by complete (work stoppage) and partial failures reducing their intensity and causing failure to comply with the work performance schedule. Organizational and technological reliability (OTR) is an important criterion of successful operation of a construction company. In the construction industry, OTR represents the ability to maintain the operating parameters of a construction company within the pre-set values.Assimilation of advanced technologies, diversity of construction materials, multiplicity of contractors, a wide range of construction operations require improvements in their reliability, an adequate assessment of the cost of construction and a lower discrepancy between scheduled deadlines and practical delivery terms. OTR improvement in the construction industry is one of the main challenges for construction companies.

DOI: 10.22227/1997-0935.2013.3.196-200

References
  1. Sedykh Yu.I., Lazebnik V.M. Organizatsionno-tekhnologicheskaya nadezhnost’ zhilishchno-grazhdanskogo stroitel’stva [Organizational and Technological Reliability of Residential Construction]. Moscow, Stroyizdat Publ., 1989, 396 p.
  2. Batienkov V.T., Chernobrovkin G.Ya., Kirnev A.D. Tekhnologiya i organizatsiya stroitel’stva. Upravlenie kachestvom v voprosakh i otvetakh [Technology and Organization of Construction Activities. Quality Management in Questions and Answers]. Rostov-on-Don, Feniks Publ., 2007, 400 p.
  3. Ginzburg A.V. Avtomatizatsiya proektirovaniya organizatsionno-tekhnologicheskoy nadezhnosti stroitel’stva [Automated Design of Organizational and Technological Reliability of Construction Activities]. Moscow, SIP RIA Publ., 1999, 155 p.
  4. Sinenko S.A. Informatsionnaya tekhnologiya proektirovaniya organizatsii stroitel’nogo proizvodstva [Information Technology Applicable to Design of Construction Operations]. Moscow, NTO «Sistemotekhnika i informatika» publ., 1992, 258 p.

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Quantitative assessment of risks for an investment project in the construction industry

  • Skiba Alisa Anatol’evna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Information Systems, Technologies and Automation in Construction, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ginzburg Aleksandr Vital’evich - Moscow State University of Civil Engineering (MGSU) (National Research University) Doctor of Technical Sciences, Professor, chair, Department of Information Systems, Technologies and Automation in Construction, Moscow State University of Civil Engineering (MGSU) (National Research University), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 201-206

The authors discuss basic methods of statistical surveillance used to assess risks associated with construction investment projects. The methods considered in this article include a sensitivity analysis (based on the assessments of initial parameters of a project and its final characteristics (usually IRR or NPV)), a method of scenarios (based on assessment of the risk of the project failure considered as the total of all probabilities of a negative NPV), a method of discount rate adjustments (based on the adjustment of the discount rate by adding a risk premium calculated by an expert or an in-house specialist), a decision tree method (whereby a project is reduced to development of a hierarchical scheme of all possible actions; results of an investment project have a treeshaped structure), a Monte Carlo method (meaning a special case of simulation). The authors describe their main advantages, disadvantages and problems that accompany their practical application. The authors also describe methods based on the fuzzy logic theory and suggest formalization of inputs and outputs as a fuzzy interval. General milestones include fuzzification, development of fuzzy rules, de-fuzzification, and methods of de-fuzzification (including a method of maximum centre, a method of maximum value, and a centroid method). The authors make their conclusion in respect of the method that may be regarded as the most suitable for investment projects in the construction industry.

DOI: 10.22227/1997-0935.2013.3.201-206

References
  1. Kovalev V.V. Finansovyy menedzhment. Teoriya i praktika. [Financial Management. Theory and Practice.] Moscow, Prospekt Publ., 2007, 1,024 p.
  2. Endovitskiy D.A., Gilyarovskaya L.T., editor. Kompleksnyy analiz i kontrol’ investitsionnoy deyatel’nosti: metodologiya i praktika [Comprehensive Analysis and Control over Investment Operations: Methodology and Practice]. Moscow, Finansy i statistika publ., 2001, 400 p.
  3. Vasil’eva T.A., Didenko O.N., Epifanov A.A. Risk-menedzhment innovatsiy [Risk Management of Innovations]. Sumy, Delovye perspektivy publ., 2005, 260 p.
  4. Ermakov C.M. Statisticheskoe modelirovanie [Statistical Modeling]. Moscow, Nauka Publ., 1982, 296 p.
  5. Zade L. Ponyatie lingvisticheskoy peremennoy i ee primenenie k prinyatiyu priblizhennykh resheniy [Notion of a Linguistic Variable and Its Application to Approximate Decision Making]. Moscow, Mir Publ., 1976, 167 p.

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Risk management principles applicable to procedures of compilation,adjustment and monitoring of a portfolio of construction projects

  • Khripushin Aleksandr Vital’evich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Information Systems, Technologies and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Ginzburg Aleksey Viktorovich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Information Systems, Technologies and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 207-211

The article represents an overview of the principles of risk management applicable at different stages of the life cycle of a portfolio of construction projects in the context of procedures of its compilation, adjustment and monitoring. Design and development of its structure contemplates collection of project initiatives for each individual portfolio, as well as assessment of risks, development of business plans, compilation of a register of projects, priority ranking of projects, identification of the most efficient portfolio, its approval and monitoring of its implementation.The authors also provide their recommendations concerning the analysis of the integrated rating of a construction project. In the final section of the article, the authors make their conclusion about the effect of the process model and the knowledge base on the implementation of construction projects.

DOI: 10.22227/1997-0935.2013.3.207-211

References
  1. Shteyn Piter. Rol’ direktora portfelya v organizatsii [The Role of the Portfolio Manager in the Company]. Upravlenie proektami i programmami [Project and Programme Management]. 2012, no. 3, pp. 188—200.
  2. PMBoK Guide and Standards. Project Management Institute, Inc., Pennsylvania, USA.
  3. Balabanov I.T. Risk-menedzhment [Risk Management]. Moscow, Finansy i statistika publ., 1996, 192 p.
  4. Bol’shov A.V., Khayrullina A.D. Risk menedzhment [Risk Management]. Kazan, KFEI Publ., 1999, 110 p.
  5. Kartseva V.V., Kartsev P.V. Uchet riskov pri otsenke stoimosti promyshlennykh predpriyatiy [Consideration of Risks in the Course of Assessment of Industrial Enterprises]. Tver, TGTU Publ., 2000, 51 p.
  6. NPG 8000/4/ Risk Management Procedures and Guidelines. NASA online directives information systems. Nodis Library, USA, 2002.
  7. Federal’nyy zakon «Ob investitsionnoy deyatel’nosti v RF, osushchestvlyaemoy v forme kapital’nykh vlozheniy» [Federal Law “On Investment Activities in the Russian Federation in the Form of Capital Expenditures”]. Available at: http\\www.consultant.ru. Date of access: 17.12.12.
  8. Metodicheskie rekomendatsii po otsenke effektivnosti investitsionnykh proektov i ikh otboru dlya finansirovaniya [Methodological Recommendations concerning the Assessment of Efficiency of Investment Projects and Their Selection for Funding Purposes]. Gosstroy Rossii Publ., Ministerstvo fin. RF Publ. Available at: http\\www.consultant.ru. Date of access: 17.12.12.
  9. Thomps P., Pinto J. Project Leadership: a Question of Timing. Project Management Journal. 1999, vol. 30, no. 1, pp. 19—26.

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INFORMATION SYSTEMS AND LOGISTICS IN CIVIL ENGINEERING

Comparative study of the energy efficiency of available and newly developed materials and structures based on the finite-element resolution of 2d and 3d problems of heat conductivity

  • Belostotskiy Aleksandr Mikhaylovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Moscow State University of Civil Engineering (MGSU), ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Shcherbina Sergey Viktorovich - Moscow State University of Civil Engineering (MGSU) engineer, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 212-219

The authors performed a comparative analysis of the energy efficiency of existing and newly developed enclosure structures of buildings. Density and heat transfer rate integrals alongside certain lines are selected as energy efficiency parameters. Finite element modeling verified by ANSYS Mechanical code is chosen as the research tool.Quasi-two-dimensional and three-dimensional options of the problem were resolved by the authors. The three-dimensional problem was resolved for a typical corner room free from embrasures.The key findings of the study are as follows:1. The two-dimensional finite element model of the wall and the three-dimensional finite element model of the corner room are produced and verified. Existing and newly developed materials and wall designs are taken into consideration in respect of the stationary heat transfer problem.2. 10.5 % reduction of the heat transfer rate was identified using the two-dimensional model, if the hat is transferred through the wall having a new design.3. The pattern of heat transfer rates is preserved in respect of the threedimensional problem of new wall designs and materials; however, particular “spikes” appear in the joints.4. A rise in the overall energy efficiency of newly developed materials and wall designs is discovered in respect of the three-dimensional problem (7.7 % along the horizontal axis and 1.5 % along the vertical axis).

DOI: 10.22227/1997-0935.2013.3.212-219

References
  1. Dmitriev A.N. Energosberegayushchie ograzhdayushchie konstruktsii grazhdanskikh zdaniy s effektivnymi uteplitelyami [Energy Saving Enclosure Structures of Civil Buildings Having Efficient Heat Insulation]. Moscow, 1999.
  2. Khutornoy A.N. Teplofizicheskoe obosnovanie novykh neodnorodnykh naruzhnykh sten zdaniy i prognozirovanie ikh teplozashchitnykh svoystv [Thermalphysic Feasibility Study of New Heterogeneous External Walls of Buildings and Projection of Their Heat-shielding Properties]. Tumen, 2009.
  3. Kaufman B.N. Teploprovodnost’ stroitel’nykh materialov [Heat Conductivity of Construction Materials]. Moscow, Iz-vo litera-tury po stroitel’stvu i arkhitekture publ., 1955, 159 p.
  4. Lykov A.V. Teoriya teploprovodnosti [Theory of Heat Conductivity]. Moscow, Vyssh. shk. publ., 1967, 599 p.
  5. Rumyantsev A.V. Metod konechnykh elementov v zadachakh teploprovodnosti [Method of Finite Elements Applicable to Problems of Heat Conductivity]. Kaliningrad, 2010, 95 p.
  6. Zenkevich O., Chang I. Metod konechnykh elementov v teorii sooruzheniy i v mekhanike sploshnykh sred [Method of Finite Elements in Theory of Structures and Mechanics of Continuous Media]. Moscow, Nedra Publ., 1974.
  7. Belostotskiy A.M., Dubinskiy S.I., Aul A.A., Nagibovich A.I., Afanas’eva I.N., Kozyrev O.A., Pavlov A.S. Verifikatsionnyy otchet po programmnomu kompleksu ANSYS Mechanical [Verification Report on ANSYS Mechanical Software]. Ìoscow, MGSU Publ., 2009, 4 vol.
  8. Structural Analysis Guide, Documentation for ANSYS, Release 12.1, 2010.
  9. Thermal Analysis Guide, Documentation for ANSYS, Release 12.1, 2010.
  10. SNiP 23-02—2003. Teplovaya zashchita zdaniy [Construction Norms and Rules 23-02—2003. Thermal Protection of Buildings].

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Computer-aided synthesis of repairs of buildings and the engineering infrastructure

  • Volkov Andrey Anatol’evich - Moscow State University of Civil Engineering (MGSU) Rector, Doctor of Technical Sciences, Professor, Chair, Department of Information Systems, Technology and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 929-52-29; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Yarulin Rustam Nazipovich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Information Systems, Technology and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 220-227

The authors present a decision making algorithm applicable in the event of an emergency involving structural elements of a building, as well as the algorithm of synthesis of repair plans (emergency and scheduled repairs) consisting in redistribution of emergency repairs over regular repairs.In the event of an accident, a structural element of a building is damaged. An expert compiles a plan of emergency repairs, according to the previously described algorithm, or using PRR CAD software. The proposed algorithm is employed to analyze the plan of emergency repairs and to reconcile it with a plan of scheduled repairs. If the decision is made to conduct emergency repairs within scheduled repairs by means of their synthesis, emergency repairs are redistributed over scheduled repairs. The algorithm of synthesis of plans of repair works is to help the expert distribute emergency repair works over scheduled repair works, or to save material, human and other resources. Implementation of algorithms in a cluster of buildings and structures requires substantial technological resources. Cloud computing technologies can serve as a platform for the implementation of the proposed solutions.

DOI: 10.22227/1997-0935.2013.3.220-227

References
  1. Volkov A.A., Yarulin R.N. Avtomatizatsiya proektirovaniya proizvodstva remontnykh rabot zdaniy i inzhenernoy infrastruktury [Computer-Aided Design of Repairs of Buildings and the Engineering Infrastructure]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 9, pp. 234—240.
  2. Norenkov I.P. Osnovy avtomatizirovannogo proektirovaniya [Fundamentals of Computer-aided Design]. Moscow, MGTU im. N.E. Baumana publ., 2002, 336 p.
  3. Yarulin R.N. Primeneniye oblachnykh tekhnologiy pri avtomatizatsii dokumentirovaniya ucheta i kontrolya otkhodov stroitel?stva [Using Cloud Technologies in Automation of Documentation, Registration and Control over Construction Waste Products]. Integratsiya, partnerstvo i innovatsii v stroitel?noy nauke i obrazovanii: sbornik trudov: v 2 t. [Integration, Partnership and Innovations in the Civil Engineering Science and Education: Collection of Works, 2 volumes]. Moscow State University of Civil Engineering (MGSU). Moscow, MGSU Publ., 2011, vol. 1, pp. 758—760.
  4. Riz D. Oblachnye vychisleniya [Cloud Application Architectures]. BKhV-Peterburg Publ., 2011, 98 p.
  5. Oblachnye resheniya ot IBM [Cloud Solutions by IBM]. Available at: http://www.ibm.com/ru/cloud Date of access: 25.08.2012.

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Automation of the process of visualization applicable to design solutionsin the autocad environment

  • Lebedeva Irina Mikhaylovna - Moscow State University of Civil Engineering (MGSU) Associate Professor, Department of Descriptive Geometry and Graphics, Moscow State University of Civil Engineering (MGSU), Moscow State University of Civil Engineering (MGSU); This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Sinenko Sergey Anatol’evich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Information Systems, Technology and Automation in Civil Engineering; +7 (495) 287-4914, ext. 31–07., Moscow State University of Civil Engineering (MGSU), Moscow State University of Civil Engineering (MGSU); This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 228-236

The authors provide a brief description of the software algorithm designed to automatize some of the final stages of design and research into buildings and structures, namely, computer-aided realistic visualization of a simulated object in the AutoCAD environment. Special attention is driven to realistic shadows that are important whenever a construction site is positioned within the environment. The software simulates sunlight by creating a remote source of light. Diffused light is generated by a set of three additional sources of light. The software algorithm is based on a pattern of light sources simulating sunlight and skylight. The point of location of each additional source of light is pre-set by the software operator. This point is identified by the software as the set of coordinates calculated using a special subroutine. The article has a table of sun angles for any time of the day and each month of the year at the latitude of Moscow.

DOI: 10.22227/1997-0935.2013.3.228-236

References
  1. Poleshchuk N.N. AutoCAD Razrabotka prilozheniy, nastroyka i adaptatsiya [AutoCAD Application Development, Customization and Adaptation]. St.Petersburg, BKhV-Peterburg Publ., 2006.
  2. Sidenko L.A. Komp’yuternaya grafika i geometricheskoe modelirovanie [Computer Graphics and Geometric Simulation]. St.Petersburg, Piter Publ., 2009.
  3. Glotova V.V., Lebedeva I.M. Mekhanizm tsentral’nogo proetsirovaniya v komp’yuternoy grafike [Mechanism of Central Mapping in Computer Graphics]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 2, vol. 2, pp. 342—346.
  4. Pozitsionirovanie solnechnykh moduley. Meteorologicheskie dannye. 2012 g. [Positioning of Solar Modules. Meteorological data. 2012.] Available at: http://www.solarinntech.ru/informations/meteorological_data Date of access: 01.04.12.
  5. Dvizhenie nebesnykh tel. Spetsial’naya astrofizicheskaya observatoriya Rossiyskoy akademii nauk. 2011 g. [Motion of Celestial Bodies. Special Astrophysical Observatory of the Russian Academy of Sciences. 2011] Available at: http://www.sao.ru/Doc-k8/Science/ Date of access: 01.04.12.
  6. Folly G., Van Dam A. Osnovy interaktivnoy mashinnoy grafiki [Fundamentals of Interactive Computer Graphics]. Moscow, Mir Publ., 1987.

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Analysis of cad software designated for analysis of water supply systemsfor the purpose of hydraulic modeling designated for renovation of pipelines

  • Orlov Vladimir Aleksandrovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Head of the Department of Water Supply and Waste Water Treatment, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Averkeev Il’ya Alekseevich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Water Supply; +7 (499) 183-36-29, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 237-243

Operation of present-day water supply networks and management of hydraulic models of pipeline networks are labour intensive and ambiguous tasks requiring a sophisticated approach. Operation of water supply networks servicing major Russian cities is accompanied by processing of extensive amounts of information; moreover, some elements of the water supply infrastructure are hidden under the ground. Nowadays operators of water supply networks take advantage of the advanced software used to solve a wide range of tasks associated with data filing, overall evaluation, analysis and optimization of the most important parameters of urban water supply networks. The above software is an essential tool in the management of water networks in major cities. Their ability to collect and process all data on water supply networks and to conduct some research aimed at the improvement of various parameters of the system, including optimization of hydraulic characteristics of the pipeline is employed by researchers and water pipeline operators.The authors analyze and compare CAD software systems designated for water supply networks servicing big cities, capable of resolving multi-component problems and ensuring the reliability of water supply systems.

DOI: 10.22227/1997-0935.2013.3.237-243

References
  1. Abramov N.N. Vodosnabzhenie [Water Supply]. Moscow, Stroyizdat Publ., 1982, 382 p.
  2. Somov M.A., Zhurba M.G. Vodosnabzhenie. T. 1. Sistemy zabora, podachi i raspredeleniya vody [Water Supply. Vol. 1. Systems of Water Intake, Delivery and Distribution]. Moscow, ASV Publ., 2008, 262 p.
  3. Gal’perin E.M. Opredelenie nadezhnosti funktsionirovaniya kol’tsevoy vodoprovodnoy seti [Identification of Reliability of Operation of the Water Supply Ring]. Vodosnabzhenie i sanitarnaya tekhnika [Water Supply and Sanitary Engineering]. 1999, no. 6, pp. 13—16.
  4. Produkty dlya analiza i proektirovaniya infrastruktury vodosnabzheniya i kanalizatsii [Software Products for Analysis and Design of the Water Supply and Sewage Infrastructure]. Available at: www.bentley.com. Date of access: 05.12.12.
  5. MIKE URBAN — Programma gidravlicheskogo rascheta sistem vodosnabzheniya [MIKE URBAN – Hydraulic Design Software for Water Supply Networks]. NKF «Volga». Available at: www.volgaltd.ru. Date of access: 05.12.12.
  6. ZuluHydro — gidravlicheskie raschety vodoprovodnykh setey. Kompaniya «Poli-term» [ZuluHydro – Hydraulic Design of Water Supply Networks. Poli-term Company]. Available at: www.politerm.com. Date of access: 05.12.12.
  7. Govindan Sh., Val’ski T., Kuk D. Resheniya Bentley Systems: gidravlicheskie modeli. Pomogaya prinimat’ luchshie resheniya [Bentley Systems Solutions: Hydraulic Models. Helping Make the Best Decisions]. SAPR i grafika [CAD and Graphics]. 2009, no. 4, pp. 36—38.
  8. Borisov D.A. Bentley Systems — modelirovanie i ekspluatatsiya naruzhnykh setey vodosnabzheniya i kanalizatsii [Bentley Systems – Modeling and Operation of Exterior Water Supply and Sewage Networks]. SAPR i grafika [CAD and Graphics]. 2009, no. 5, pp. 64—68.
  9. Produkty serii MIKE kompanii DHI Water & Environment [MIKE Series Software Developed by DHI Water & Environment]. Available at: www.mikebydhi.com. Date of access: 05.12.12.
  10. Khramenkov S.V. Strategiya modernizatsii vodoprovodnoy seti [Water Supply Pipeline Upgrade Strategy]. Moscow, Stroyizdat Publ., 2005, 398 p.

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Original approach to service life prognostication developed for residential buildings

  • Volkov Andrey Anatol’evich - Moscow State University of Civil Engineering (MGSU) Rector, Doctor of Technical Sciences, Professor, Chair, Department of Information Systems, Technology and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 929-52-29; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Muminova Svetlana Rashidovna - Moscow State University of Civil Engineering (MGSU) Research Assistant, Scientific and Educational Centre for Information Systems and Intelligent Automatics in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 244-248

A novel integrated mathematical model for devaluation of residential buildings is presented. The devaluation model proposed by the authors is a useful tool employed to predict the residual life span of a building. Availability of information concerning the building behaviour in the course of time makes it possible to influence its properties by means of renovation or restructuring-related actions to resist the aging process. Thisapproach can be regarded as a way to extend the service life span of residential buildings.

DOI: 10.22227/1997-0935.2013.3.244-248

References
  1. Muminova S.R., Pahl P.J. An Integrated Model of Planning Processes for Building Devaluation and Renovation. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 10, pp. 297—304. Available at: http://vestnikmgsu.ru/index.php/en/archive. Date of access: 15.11.2012.
  2. Schr?der, Jules: Zustandsbewertung grosser Geb?udebest?nde. Schweizer Ingenieur und Architekt, no. 17, April 1989, pp. 449—459.
  3. Schweizer Bundesamt f?r Konjunkturfragen: Impulsprogramm Bau (IP BAU). Alter-ungsverhalten von Bauteilen und Unterhaltskosten: Grundlagendaten f?r den Unterhalt und die Erneuerung von Wohnbauten. Bern, December 1994, 110 p.
  4. Kirkham R.J., Alisa M., Pimenta da Silva A., Grindley T., Brondsted J. EUROLIFE-FORM: an Integrated Probabilistic Whole Life Cycle Cost and Performance Model for Buildings and Civil Infrastructure. Proceedings of International Construction Research Conference of the Royal Institution of Chartered Surveyors (COBRA 2004), September 2004.
  5. Cole I.S., Corrigan P.A (2009). Development of a Range of Methods for Estimating the Service Life of Buildings and Engineered Structures. In Anderssen R.S., Braddok R.D. and Newham L.T.H., editors. 18th World IMACS Congress and MODSIM09 International Congress on Modeling and Simulation. Modeling and Simulation Society of Australia and New Zealand and International Association for Mathematics and Computers in Simulation. July 2009, pp. 2377—2383.

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PROBLEMS OF HIGHER EDUCATION IN CIVIL ENGINEERING

Competence-based approach to automated design in civil engineering

  • Knyazeva Natal’ya Viktorovna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Information Systems, Technology and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Volkov Andrey Anatol’evich - Moscow State University of Civil Engineering (MGSU) Rector, Doctor of Technical Sciences, Professor, Chair, Department of Information Systems, Technology and Automation in Civil Engineering, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 929-52-29; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 249-254

The authors argue that today the labor market in the construction industry requires a new breed of experts, new dynamic and flexible professionals capable of enhancing the efficiency of enterprises. Obviously, the education system is unable to cover the gap between supply and demand for the new-style professionals.A professional standard is a multifunctional regulatory document setting the scope of responsibilities of employees and requirements applicable to their competences, or professional standards.The competence-based approach is an adaptive model based on the content of education that is not solely related to training in a particular area of knowledge. This approach serves as the basis for the technical requirements applicable to professional standards.The system of competences developed for the educational standard in “InformationTechnology” includes the following positions:1. General professional competences,2. Skill profile competences,3. Competences in basic technologies,4. Outgoing (work-related) competences,5. Supplementary competences.The education system in the Russian Federation is the leading social institution responsible for the update and transfer of knowledge to new generations, personal training and development of the national economy. Interaction between education and business sectors is to be aimed at development of professional standards.

DOI: 10.22227/1997-0935.2013.3.249-254

References
  1. Kruglyy stol: «Professional’nyy standart kak osnova povysheniya kachestva stroitel’stva» [Roundtable Discussion: “Professional Standard as the Basis for the Improved Quality of Construction Operations]. Tekhnicheskoe regulirovanie. Stroitel’stvo, proektirovanie i izyskaniya [Technical Regulations. Construction, Design and Research]. 2012, no. 1, pp. 9—13.
  2. Sukhomlin V.A. Professional’nye standarty i obrazovanie. Perpendikulyarnyy vzglyad [Professional Standards and Education. A Different Viewpoint]. 2012. Available at: www.za-nauku.ru. Date of access: 15.09.12.
  3. Obsuzhdenie Kontseptsii profobrazovaniya i formirovaniya plana profstandartov pod egidoy AP KIT [Discussion of the Concept of Professional Education and Generation of the Plan for Professional Standards under the Auspices of Association of Enterprises Specializing in Computer and Information Technologies]. Available at: http://www.apkit.ru. Date of access: 21.09.12.
  4. Professional’nyy standart «Arkhitekturno-stroitel’noe proektirovanie» Proekt. Natsional'noe ob»edinenie proektirovshchikov [Professional Standard for “Architectural and Structural Design”. Draft. National Association of Designers.] Moscow, 2011.
  5. Knyazeva N.V. Model’ upravleniya transferom professional’nykh znaniy v sistemakh avtomatizirovannogo proektirovaniya v stroitel’stve [Model for the Management of Transfer of Professional Knowledge in Systems of Computer-aided Design in Civil Engineering]. Izvestiya KGASU [News of Kazan State University of Architecture and Civil Engineering]. 2012, no. 2 (20), pp. 298—304
  6. Volkov A.A. Ekonomicheskiy analiz tekhnicheskikh i tekhnologicheskikh innovatsiy v stroitel’stve [Economic Analysis of Technical and Technological Innovations in Civil Engineering]. Stroitel’nye materialy, oborudovanie, tekhnologii XXI veka [Construction Materials, Machinery and Technologies of the 21st Century]. 2005, no. 12, pp. 54.

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Use of didactic principle in the study of state standards eskd and spds aware of engineering graphics

  • Tel’noy Victor Ivanovich - Moscow State University of Civil Engineering (MSUCE) Candidate of Military Sciences, Associated Professor, Associate Professor of Descriptive Geometry and Engineering Graphics; 8499183-24-83., Moscow State University of Civil Engineering (MSUCE), 26, Jaroslavskoe shosse, Moscow, 129337, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 255-262

Didactic principles: scientific, systematic and consistency, clarity, communication theory and practice, consciousness and activity of students, the strength of learning, accessibility, individual approach to learning in a collective work, raising a training used in the teaching of different disciplines and are independent of the subject of study. But their application to any particular discipline is different, reflecting the specifics of a particular discipline Review and assess the characteristics of traditional didactic principles: the study of state standards ESKD and ASAP in the course of engineering graphics to enhance learning and cognitive activity of students to study the concept of the normative documents used in the development and design of working drawings of details and architectural drawings.The proposed approaches to the application of information technologies in the use of didactic principles can significantly improve the efficiency of the students to study the state standards, develop their ability to link theory with practice, form design skills of graphic culture, bring attention and care to increase the interest of the whole to learn and do it more accessible.

DOI: 10.22227/1997-0935.2013.3.255-262

References
  1. Polezhaev Ju.O., Tel’noy V.I. Metodika izucheniya distsipliny «Nachertatelnaya geometriya» [The method of studying the discipline «Descriptive Geometry»]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2007, no 1, pp. 82—83.
  2. Golub B. À. Osnovy obwej didaktiki [Fundamentals of general didactics]. Available at: http://www.gumer.info/bibliotek_Buks/Pedagog/golub/01.php. Accessed: Nov 17, 2012.
  3. Didakticheskie principy i ih realizacija v pedagogicheskoj praktike [Didactic principles and their implementation in teaching practice]. Available at: http://www.didakticheskie-principy-i-ix…v… . Accessed: Nov 17, 2012.
  4. Mihajlenko O.I. Principy obuchenija [Principles of teaching. Methods and tools for learning]. Available at: http://www.kpip.kbsu.ru. Accessed: Nov 17, 2012.
  5. Principy i pravila obuchenija [Principles and rules of training]. Available at: http://www.printsipy-i-pravila-obucheniya. Accessed: Nov 17, 2012.
  6. Principy obuchenija kak kategorii didaktiki, otrazhajuwie ee normativnuju funkciju [Principles of learning as a category of didactics, reflecting its regulatory function]. Available at: http://www.chepfa.ru/school2/files/eduprinciples.doc. Accessed: Nov 17, 2012.
  7. Tel’noy V.I., Tsareva M.V. Ispol’zovanie informatsionnykh tekhnologiy pri prepodavanii komp’yuternoy grafiki [Use of information Technologies in Teaching Computer Graphics]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 6, pp. 161—165.
  8. Kondrat’eva T.M., Borisova A.Ju., Znamenskaja E.P., Mitina T.V., Tepljakov A.A., Petrova L.A., Polezhaev Ju.O. Inzhenernaja grafika. Praktikum dlja studentov 1-go kursa vseh napravlenij podgotovki [Engineering Graphics. Workshop for students of 1-st year of training areas]. Moscow, MSUCE, 2012. 40 p.
  9. Tel’noy V.I. Primenenie novyh informacionnyh tehnologij pri izuchenii discipliny «Inzhenernaja grafika» [The use of new information technologies in the study of the subject «Engineering Graphics»]. Integration, partnership and innovation in construction science and education: scientific publication. Moscow, MSUCE, 2012, pp. 786—791.
  10. Tel’noy V.I., Ivashchenko A.V. Avtomatizatsiya protsessa kontrolya znaniy studentov po inzhenernoy grafike pri distantsionnom obuchenii [Computer-Assisted Control of Academic Performance in Engineering Graphics within the Framework of Distance Learning Programmes]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 6, pp. 136—141.

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