Home Vestnik MGSU Library Vestnik MGSU 2017/9

Vestnik MGSU 2017/9

DOI : 10.22227/1997-0935.2017.9

Articles count - 14

Pages - 1069

DRY MORTARS FOR CONSTRUCTION OF PROTECTIVE STRUCTURES AGAINST NEUTRONS WITH ENERGY OF 14.8 MeV

  • Pustovgar Andrey Petrovich - Moscow State University of Civil Engineering (National Research University) (MGSU) candidate of technical sciences, assistant professor, Vice Rector for Research, scientific director of the Research Institute of Building Materials and Technologies (SRI SMiT), Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 947-953

Subject: concrete for construction of protective structures from neutrons with energy of 14.8 MeV. When constructing protective structures from ionizing radiation in the buildings of nuclear facilities, special attention is given to the work quality and conformity assessment of the built structures to the project documentation requirements. Research objectives: the objective is to obtain the necessary data for verification of software programs for neutron-physical analysis of protective characteristics of concretes with different chemical composition. Materials and methods: in order to achieve the objectives, computational and experimental studies were carried out using a 14.8 MeV neutron generator, a spectrometric and dosimetric equipment complex, and the ANISN computational software package. Studies were carried out for two compositions of concrete. Results: the results of the performed studies showed satisfactory agreement between the computational and experimental data. Conclusions: the obtained results of computational and experimental studies will allow us to develop simple semi-empirical calculation methods that can be used in designing concrete compositions with the required protective efficiency from neutrons with energy of 14.8 MeV and in controlling the stability of chemical composition of dry concrete mixtures during their production and usage.

DOI: 10.22227/1997-0935.2017.9.947-953

Download

QUALITY CONTROL OF CONSTRUCTING “DRY” PROTECTION OF BELARUSIAN NPP

  • Bushuev Nikolay Ivanovich - Moscow State University of Civil Engineering (National Research University)(MGSU) Candidate of Technical Sciences, Associate Professor, Department of Construction of Heat and Nuclear Power Facilities, Moscow State University of Civil Engineering (National Research University)(MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Vvedenskaya Anna Sergeevna - Research, Design and Technological Institute of Concrete and Reinforced Concrete named after. A.A. Gvozdev (NIIZhB) Master, Research, Design and Technological Institute of Concrete and Reinforced Concrete named after. A.A. Gvozdev (NIIZhB), 6/5 2nd Institutskaya str., Moscow, 109428, Russian Federation.

Pages 954-961

Research subject: “dry” protection serves to lower the radiation flow of nuclear reactor core and reduce radiation heat to assure normal operation of biological protection. It guarantees desired operating conditions of neutron flux control equipment by being the element of normal use of the nuclear facility’s system. Goals: uniform distribution of concrete’s density and moisture percentage in “dry” containment shell are requisite conditions for nuclear facility’s successful operation. Control of “dry” protection’s production is performed in two stages. First stage - after concrete’s pouring and concrete strength development. The second one - after the heat treatment. Heat treatment is required for stabilization of physicotechnical characteristics in the volume of “dry” containment shell by being the most expensive and important operation. Materials and research methods: serpentinite concrete is used for “dry” containment shell. At elevated temperatures it saves up to 15 % of chemically bound water which contains hydrogen necessary for lowering fast and intermediate neutron fluxes. Requirements for concrete laying in metal formwork are given. Density and moisture determination was carried out by logging equipment with measurement data recording. Logging probe is used for simultaneous recording of scattered gamma rays (gamma-gamma logging - GGL) to determinate concrete’s density and of secondary scattered fast and intermediate neutron flux, mainly on hydrogen’s atoms (neutron-neutron logging - NNL), to determinate concrete’s moisture. Results: processing of the measurement results was carried out in accordance with the rules of determination and methods of calculating the statistical characteristics from the sample data. The coefficient of variation between all passages of blocks of “dry” protection of GGL before heat treatment is equal to 12.37 %, after heat treatment - 9.5 %, and NNL - 3.42 % and 3.04 % respectively. Conclusions: the above results show that the “dry” protection of the Belarusian NPP after heat treatment satisfies the requirements of uniformity both in density and humidity.

DOI: 10.22227/1997-0935.2017.9.954-961

Download

RESIDENTIAL ARCHITECTURE OF YEREVAN IN 20TH CENTURY: MULTIFUNCTIONALITY IN THE STRUCTURE OF RESIDENTIAL BUILDINGS OF THE FIRST HALF OF THE CENTURY

  • Azatyan Karen Rubenovich - National University of Architecture and Construction of Armenia (NUACA) Candidate of Architecture, Associate Professor, Department of Architectural Drafting and Architectural Environment Design, National University of Architecture and Construction of Armenia (NUACA), 105 Teryan str., Yerevan, 0009, Armenia.

Pages 962-970

Subject: The buildings of the residential architecture of Yerevan of the 20th century make up not only a significant part of the city's housing stock but they are also the main components of the city’s image. Consequently, the study of architecture of these structures is important for solving the problems of city-building both in the present and in the future. In this context, a special place is occupied by residential architecture of the first half of the century one of the main features of which - the multifunctional structure - is the subject of this study. Research objectives: The goal of the study is to identify the features of the multifunctionality factor influence on the architecture of Yerevan's residential buildings of the first half of the 20th century. Materials and methods: The work was carried out on the basis of observations and published sources by the method of theoretical study, analysis and generalization of the material. Results: This work is composed of the following thematic units: the multi-use architecture and housing (i.e., the dwelling in the process of historical development of multi-use architecture); multifunctionality in the structure of the first multi-apartment houses of Yerevan (multi-use structure of apartment-houses of Yerevan in the 19th century); formation of the city’s multifunctional structure and the housing’s architecture (appearance of the city’s functionally integrated structure, formation of perimeter style of city-building, spatial organization of public services and their impact on the architecture of residential buildings of the first half of the 20th century); examples of multi-use residential buildings (some specific examples). Conclusions: The features of residential buildings caused by the multifunctionality of their architecture are identified as a result of the analysis and the key points of the results of the generalizing study are presented. These conclusions should be included in the process of general study of development of the residential architecture of Yerevan in the 20th century.

DOI: 10.22227/1997-0935.2017.9.962-970

Download

ARCHITECTURAL APPEARANCE OF THE CULTURE HOUSE NAMED AFTER V.P. CHKALOV (1939-1940) IN THE TOWN OF CHKALOVSK OF NIZHNY NOVGOROD REGION

  • Volkova Elena Mikhaylovna - Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU) Candidate of Architecture, Аssociate Professor, Department of Standard and Engineering Graphic, Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU), 65 Il’inskaya str., Nizhny Novgorod, 603950, Russian Federation.

Pages 971-980

This research is important as it considers problems of historical and cultural heritage of Chkalovsky district of Nizhny Novgorod region, represented mainly by religious buildings of the XVII - early XX centuries, by the example of architectural appearance of the Culture House named after V.P. Chkalov - the public building in the style of postconstructivism, built in 1939-1940 by the design of architect A.A. Yakovlev, typologically fully meeting social requirements of its time and being a monument of regional value nowadays. We analyzed the construction history of the Culture House in the look of which the characteristic tendencies of Russian architecture of the 1940s were embodied - a return to neo-classics through the experience of constructivism, which manifested itself in the scale of the building with large divisions and dynamic forms; a symmetric plan resembling, by its outline, an aircraft; the use of monumental symmetry of the main facade, details of the classic order as a decor of the exteriors and interiors; the symbols of the state: a five-pointed star on the steeple of the belvedere tower, the high reliefs of the USSR coat-of-arms framed with banners and aviation signs on the main facade, the sickle and hammer. Architectural appearance of the Culture House features: good location of the building near the Memorial Museum of V.P. Chkalov which made it possible to form a complete ensemble of historical-cultural heritage of the pilot; facing of the main faсade of the building to the direction of Volga, decorated with a high relief portrait of V.P. Chkalov made by the sculptor A.V. Kikin; correctly selected scale of the building which is the dominant of metrorhythmic composition of Chkalov street that forms a panorama of the town of Chkalovsk, visible from Volga. Architectural appearance of Chkalov street in the studied place is an example of morphotypical preservation of fragments of the environment of mid 1940s due to the presence of: low-rise residential buildings typical for this area, among them is the House-Museum of V.P. Chkalov; aircraft hangar; the Culture House the complex reconstruction of which will contribute to the preservation of historical and cultural heritage, improving the quality of life of the population, increase of touristic and investment attractiveness of Chkalovsky district of Nizhny Novgorod region. Subject: architectural appearance of the Culture House named after V.P. Chkalov in the town of Chkalovsk of Nizhny Novgorod region built in the style of postconstructivism in 1939-1940 by the design of architect A.A. Yakovlev. Goals: determination of the place of the Culture House named after V.P. Chkalov in the town of Chkalovsk among the architectural monuments of Chkalovsky district of Nizhny Novgorod region, among the buildings of similar style; description of building’s construction history; a comprehensive analysis of its architectural appearance which includes space-planning solution, functional zoning of the interiors, decor; development of recommendations on reconstruction of the building. Materials and methods: methodological basis of this work is the systems approach in the unity of analysis and synthesis that allows us to consider the main characteristics of architectural appearance of the Culture House in interrelations. For summarizing the materials obtained from literature sources, bibliographic analysis was used; for field survey - photographic fixation and graphical and analytical analysis were used. Results: comprehensive analysis of architectural appearance of the Culture House named after V.P. Chkalov; introduction, into scientific usage, of the data about the building in the style of postconstructivism: the history of its creation, stylistics, space-planning solution, functional zoning of the interiors, décor; determination of the place of the Culture House among the architectural monuments of Chkalovsky district of Nizhny Novgorod region, among the buildings of similar style; development of recommendations on reconstruction of the building. Conclusions: results of this research can form the basis of documents required for creation of project of reconstruction for the Culture House named after V.P. Chkalov in the town of Chkalovsk. Complex reconstruction of this examined building with development of its former functions will contribute to improvement of quality of social life of local population, preservation of historical and cultural heritage that forms the panorama of Chkalovsk, visible from Volga, increase of touristic attractiveness of this town.

DOI: 10.22227/1997-0935.2017.9.971-980

Download

INNOVATIVE TECHNOLOGY OF INSTALLATION OF HINGED VENTILATED FACADES FOR CIVIL CONSTRUCTION

  • Afanasyev Aleksander Alekseevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Corresponding Member of Russian Academy of Architecture and Building Sciences, Honored Worker of the Higher School of Russia, Honored Worker of Higher Professional Education of the Russian Federation, Honored Builder of the Moscow Region, Department of Technology and Management of the Construction, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Zhunin Andrey Alekseevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Postgraduate student, Department of Technology and Management of the Construction, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 981-989

Subject: the methods of optimization of organizational-technological and design solutions for installation of energy-efficient enclosing structures are described in the article. The results of research on the development of hinged ventilated facade systems with the use of factory technology are given. A comprehensive analysis of domestic and foreign facade systems, together with the technology for production of works on their installation, has been carried out; their operating properties have been studied. The main design and technological solutions for manufacturing and installation of facade panels on the construction site, the features of the mechanization tools used, control of work quality and reliability of the system are presented. The system for manufacturing ventilated facades with high manufacturing readiness level and a wide range of applications is developed on the basis of theoretical and design solutions. The use of this technology in monolithic and large-panel housing construction significantly reduces labor intensity and cost of work. The core of the research was the use of methods for reducing labor costs during installation of energy-efficient ventilated facades and improving the quality control of installation work by developing new design and technological solutions. Goals: the aim of the research is to develop an industrial technology for installation of energy-efficient enclosing structures by optimizing production processes during manufacturing and installation of facade systems by the method of aggregate assembly. Materials and methods: the basis of the proposed method is the technology for manufacturing reinforced concrete enclosing elements of a width equal to the axial dimension between the inner bearing walls. Several types of panels with window and door apertures (for loggias and balconies), and also bay windows, have been developed. Results: the comprehensive studies have shown that the use of factory-made ventilated facade panels allows us to reduce the labor intensity of work by 4-6 times with the provision of high quality facade works. Technologies for production of works on installation of enclosing structures, arrangement of a construction site and workplaces that meet the requirements of Federal Laws No. 384-FZ and No. 123-FZ have been developed. The design solution of the developed façade system takes into account the requirements of GOST 11024-2012 and GOST 13015-2012, and also the requirements of certified albums of technical solutions for arrangement of elements of the subsystem and insulation. In accordance with the current building codes and data, obtained experimentally and analytically, and also by regression analysis, trend lines for the dependence of specific labor costs and work production costs have been obtained. Conclusions: the developed design and technological solution for mounting hinged ventilated facades is relevant both to monolithic and large-panel housing construction. Further development and identification of the most rational organizational and technological solutions for installation of energy-efficient enclosing structures will be able to affect the reduction in duration of residential building construction.

DOI: 10.22227/1997-0935.2017.9.981-989

Download

INSTITUTIONAL REGULATION OF TECHNICAL EQUIPMENT AT THE LEVEL OF CONSTRUCTION ORGANIZATIONS

  • Volkov Andrey Anatol’evich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Rector, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Tuskaeva Zalina Ruslanovna - North-Caucasian Institute of Mining and Metallurgy (State Technological University) (NCIMM (STU)) Candidate of Economical Sciences, Associate Professor, Head of the Department of Construction Industry, North-Caucasian Institute of Mining and Metallurgy (State Technological University) (NCIMM (STU)), 44 Nikolaeva st., Vladikavkaz, 362021, Russian Federation.

Pages 990-998

Subject: the subject of research is the characteristics of technical equipment at the level of independent construction organizations and integrated formations. Goals: the analysis of the condition of fleet of the construction equipment being used has revealed great problems. These problems have quite persistent nature since 1990, from the moment of unbalancing of the re-equipping process at the level of the entire national economy. The identified problems are associated with a high level of depreciation of construction equipment and a large percentage of obsolete equipment. Therefore, it is necessary to find the most effective mechanisms for regulating technical equipment condition that contribute to reducing operating costs, increasing the work efficiency and, accordingly, to the competitiveness growth in the context of difficult financial situation of construction organizations. Construction equipment is one of the most capital-intensive factors of production, and therefore, its management requires consideration of all costs for both exploited and newly acquired equipment. The costs for owning and operating machinery are an appreciable part of the organization's expenses. Accounting for this circumstance is especially important as modern technologies require the use of a wide variety of fairly expensive machines. Materials and methods: statistical, abstract-logical and computation and design methods of research were applied. Results: the article proposes mechanisms and measures for regulating technical equipment which create the basis for its growth at the level of independent construction units. This includes the compilation of an annual cost estimate for each unit of equipment, a forecast cost estimate for the equipment purchased, creation of mechanization bases with a specific structure and features of functioning. Conclusions: the conclusions proposed in the article focus on the need to comprehensively search for reserves for the renewal of construction equipment, to find mechanisms for efficient use of the existing fleet of available equipment.

DOI: 10.22227/1997-0935.2017.9.990-998

Download

MATHEMATICAL MODELING OF THE IMPACT OF RAW MATERIAL COMPOSITION ON COMPRESSIVE STRENGTH OF HIGH PERFORMANCE FINE-GRAINED CONCRETE

  • Tang Van Lam - Moscow State University of Civil Engineering (National Research University) (MGSU) Postgraduate Student, Department Technology of Binders and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Bulgakov Boris Igorevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department of the Technology of Binders and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Aleksandrova Olga Vladimirovna - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department Technology of Binders and Concretes, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 999-1009

Subject of Study: the creation and analysis of mathematical models adequately describing the effect of the input variable factors - the proportions of raw components of the concrete mix - on the compressive strength of high performance fine-grained concrete at the age of 28 days of normal hardening, which are considered as output objective functions. Objectives: to determine the optimum ratios of ingredients of fine-grained concrete mixture, which allow us to achieve the maximum strength of concrete in compression. Materials: for obtaining fine-grained concrete mix, a finely distributed binder was used consisting of Portland cement of the type CEM II 42,5 N produced by the “Hoang Thach” factory, fly ash, rice husk ash (all - Vietnam) with addition of superplasticizer Ace 388 BASF (Germany) and polypropylene fine fibers Mega Mesh (Malaysia). As for the fine filler, quartz sand from the Lo river (Vietnam) was used. Methods: the compressive strength of high performance fine-grained concrete was determined in accordance with the requirements of GOST 10180-2012 “Concretes. Methods of strength determination by control samples”; the initial composition of the concrete mix was calculated using the absolute volume method. Results: the paper presents results of mathematical modeling of the effect of raw materials on the compressive strength of high performance fine-grained concrete at 28 days of normal hardening. First and second order regression equations for the dependence of the compressive strength on the ratio of raw materials x2 () and x3 () and also the image of the surface expression and the contour of the objective function for these regression equations were obtained. Conclusions: The maximum value of compressive strength of high performance fine-grained concrete at 28 days of age, evaluated by using the computer program Maple 13 in the regression equation of the second order, is R = 75.85 MPa at = 0.854 and = 0.324.

DOI: 10.22227/1997-0935.2017.9.999-1009

Download

CAST CONCRETE WITH THE USE OF Copper PRODUCTION WASTES AND NANO SILICA

  • Kravtsov Aleksey Vladimirovich - Kostroma State Agricultural Academy (KSAA) Postgraduate student, Department of Building Technology, Management and Economy, Kostroma State Agricultural Academy (KSAA), 34 Uchebniy gorodok, Karavaevo poselok, Kostroma oblast, 156530, Russian Federation.
  • Tsibakin Sergey Valerievich - Kostroma State Agricultural Academy (Kostroma SAA) Candidate of Technical Sciences, Associate Professor, Kostroma State Agricultural Academy (Kostroma SAA), poselok Karavaevo, Kostromskaya oblast', 156530, Russian Federation.
  • Evseeva Tatyana Mihaylovna - Kostroma State Agricultural Academy (Kostroma SAA) Student, Kostroma State Agricultural Academy (Kostroma SAA), poselok Karavaevo, Kostromskaya oblast', 156530, Russian Federation.
  • Sobolev Konstantin Gennadievich - University of Wisconsin-Milwaukee Candidate of Technical Sciences, Professor, Head of Department of Construction and Environmental Protection, University of Wisconsin-Milwaukee, P.O. Box 784, Wisconsin, Milwaukee, USA, 53201.
  • Potapov Vadim Vladimirovich - Scientific Research Geotechnological Center Far Easter Branch of Russian Academy of Sciences Doctor of Technical Sciences, Professor, Chief Scientific Officer, Scientific Research Geotechnological Center Far Easter Branch of Russian Academy of Sciences, 30 North-East shosse, Petropavlovsk-Kamchatsky, Russian Federation, 683002.

Pages 1010-1018

Subject: applying mineral microfillers based on technogenic waste of non-ferrous metallurgy together with nano silica in the technology of cast and self-compacting concrete is the subject of the paper. The results of the previous experiments proved the effectiveness of the use of ground copper slag in the technology of cast concrete mixtures. However, there are no research results on the combined work of the microfiller and nanoparticles in plastic concrete mixtures. Research objectives: determining the optimal range of the use of nano silica in cast concrete mixtures with copper slag filler from the viewpoint of conservation of plasticity of the concrete mixture and increase of the concrete strength. Materials and methods: plasticity of the concrete mixture was determined according to spread of a small cone on the shaking table by the method developed in NRU MGSU. The strength of concrete samples was checked according to GOST 10180-2012. Statistical processing of the obtained results was carried out by the least square method. Results: plots showing dependence of plasticity of the concrete mixture and strength of cast concrete with ground copper slag on the dosage of nanoparticles and also the influence of the dosage of superplasticizer on the indicated properties at high values of the content of nano silica were obtained. Regression equations for all specified dependencies were derived. Conclusions: it is established that the introduction of nano silica in a dosage of 0.1…0.5 % of cement weight positively affects the concrete strength when used in conjunction with copper slag and superplasticizer. The developed compositions of cast fine-grained concrete mixtures can be used in high-density reinforcement concrete structures with strict requirements for size of fillers and plasticity of the concrete mixture.

DOI: 10.22227/1997-0935.2017.9.1010-1018

Download

COMPLEX OF GEOPHYSICAL METHODS FOR ASSESSING THE QUALITY OF CONCRETE CASTING DURING CONSTRUCTION OF BOGUCHANY HYDROPOWER PLANT

  • Aniskin Nikolay Alekseevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Director, Institute of Hydraulic Engineering and Power Engineering, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Vasilevskaya Larisa Sergeevna - Branch of the Design and Research and Research Institute “Gidroproekt” named after S.Ya. Zhuk - Center for Geodynamic Observations in the Energy Industry (CSGNEO) Head of the Group, Branch of the Design and Research and Research Institute “Gidroproekt” named after S.Ya. Zhuk - Center for Geodynamic Observations in the Energy Industry (CSGNEO), 2 Volokolamskoe shosse, Moscow, 125993, Russian Federation.
  • Antonov Anton Sergeevich - Design and Research and Research Institute “Gidroproekt” named after S.Ya. Zhuk Engineer, Design and Research and Research Institute “Gidroproekt” named after S.Ya. Zhuk, 2 Volokolamskoe shosse, Moscow, 125993, Russian Federation.

Pages 1019-1026

Subject: as a result of long break in construction of Boguchany HPP and the impact of external climatic and anthropogenic factors, aging and local destruction of concrete gravity dam took place, which necessitated repairs. The article deals with the geophysical methods used to assess the effectiveness of repair work on concrete dam of Boguchany HPP. Goals: the goal of the research was the quality control of works on the “healing” of concrete in the sections of abutment of a concrete dam to a rock-fill dam using a complex of geophysical methods, and determination of elastic and strength properties of concrete. Materials and methods: a set of geophysical non-destructive methods is proposed, including ultrasonic examination and seismotomography. To analyze the obtained materials, histograms and cumulative curves for distribution of values of the obtained velocities of elastic waves of the entire investigated region have been constructed. Results: the study showed that the repair works carried out had a positive effect on the elastic and strength properties of concrete. This is confirmed by a decrease in the area of structure’s regions in which the reduced parameters were observed. Conclusions: the proposed set of research methods has proved its effectiveness. It allowed us to obtain sufficient amount of experimental data on the state and quality of concrete at Boguchany HPP.

DOI: 10.22227/1997-0935.2017.9.1019-1026

Download

DISTRIBUTION OF AXIAL VELOCITIES IN A LAMINAR FLOW WITH COUNTER-ROTATING COAXIAL LAYERS

  • Zuikov Andrey L’vovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor of the Department of Hydraulics and Hydrotechnical Engineering, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 1027-1038

Subject: the article is related to the field of hydrodynamics, in particular, to scientific foundations of hydraulic engineering construction, and is devoted to the laminar flow of an incompressible fluid in a cylindrical tube, where moving together coaxial layers rotate in opposite directions. This is so-called “counter-vortex” flow. This flow has a structure that promotes intensive diffusion of the moving medium and dissipation of its mechanical energy. Diffusion of multiphase and heterogeneous media is used in microbiology, chemistry, ecology, heat engineering, power engineering, engine and rocket engineering, and energy dissipation is required in deep water spillways of high-pressure waterworks. Goals: the goal of this research is development and analysis of the theoretical model of the flow, which makes it possible to reveal the general physical laws of its hydrodynamics. Materials and methods: the theoretical model is based on the method of linearization of the Navier-Stokes’s differential equations using standard assumptions and method of their solution by expansion into Fourier-Bessel’s series. Results: theoretical functions for the radial and longitudinal distributions of tangential and axial velocities in the investigated flow are obtained. The graphs of these distributions are given for characteristic swirls of interacting layers and the Reynolds number equal to Re = 500. Conclusions: analysis of the obtained model showed that the change of medium viscosity affects inversely proportionally the length of the zone of intense viscous diffusion of the swirl of interacting layers, where counter-vortex flow is transformed into longitudinal-axial flow with no swirling. With a decrease in the viscosity of the medium, the process of interaction of oppositely rotating layers is stretched along the length, but with increasing viscosity, it shortens. In the near-axial region of counter-vortex flow a strong return current is observed. This phenomenon can be used for efficient afterburning of fuel in combustion chambers of thermal power plants and jet engines.

DOI: 10.22227/1997-0935.2017.9.1027-1038

Download

FORMATION OF BUILDING AND TRANSPORT COMMUNICATIONS IN AREAS, ADJACENT TO CITY EMBANKMENTS

  • Storchak Yuriy Anatolyevich - Global Media Group e (GMGe) , Global Media Group e (GMGe), 3 Lesi Ukrainki blvd., 01023, Kiev, Ukraine.

Pages 1039-1052

Issues of town-planning development of coastal territories and planning of their transport framework are considered. Town-planning ideology is largely based on typologies of various engineering-planning and architectural-design solutions of artificial elements urbanizing the space, strategically realizing the priority of preserving a natural environment favorable for living, comfort, sanitary and hygienic well-being, security, optimal organization and efficiency of transport infrastructure functioning. Subject: city embankments in the context of buildings adjacent to them. Goals: to define conceptual approaches and identify mechanisms of town-planning analysis of transport service in coastal territories. Materials and methods: scientific research was based on contextual, theoretical, empirical and practical analysis of city embankments. Results: the concepts and classification of city embankments created on the basis of projects implemented in different countries are presented. Conclusions: On the basis of these data it is possible to form comprehensive and specialized strategies for development of territories based on the need to formulate and solve various scientific and practical goals and tasks.

DOI: 10.22227/1997-0935.2017.9.1039-1052

Download

METHODOLOGY AND CONCEPTUAL MODELING OF FUNCTIONAL STRUCTURE OF INDUSTRIAL DEVELOPMENT OF INDUSTRIAL PARKS

  • Grebenshchikov Vladimir Sergeevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Economic Sciences, Vice-Rector, Associate Professor of the Department of Construction Organization and Real Estate Management, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 1053-1060

Subject: the article considers the problems of managerial and organizational-economic relations reflecting the conceptual modeling of the interrelationships of the main participants in development activities in the implementation of investment and construction projects of industrial parks, and describes organizational forms and methods of managing the total cost of ownership of industrial real estate, based on a functional approach and functional modeling of the industrial development structure. Research objectives: elaboration of conceptual models of the functional structure of industrial development of industrial parks using methodological approaches based on the principles of functional-system modeling of development structures. Materials and methods: a set of systemic interrelated methodological approaches based on the use of functional modeling theory, economic-mathematical, technical-economic, logical analysis, as well as reliability and risk theories, simulation and functional statistical modeling, expert assessments, situational analysis and forecasting was used. Results: the article demonstrates the results of theoretical research of the author in the field of methodological modeling of industrial development systems for the construction of industrial parks based on the use of a functional-system approach. The final theoretical functional model is presented, when the object of research is considered in the form of functions or goal settings of the action, which is based on selection and structuring of subsystems consisting of function-stages, function-tasks, objects of reproduction, as well as different levels and situations of management, and also options for state-private partnership. The concept of «industrial development of industrial parks» was also refined. Conclusions: the performed research value was determined from the standpoint of elaboration of the theory and methodology in the field of industrial development with a focus on construction of large, complex and unique objects, as well as on scientific and practical evolution of the processes of state-private partnership in the management of industrial construction of industrial parks.

DOI: 10.22227/1997-0935.2017.9.1053-1060

Download

DATABASE MODEL FORMATION FOR IMPROVING THE ORGANIZATIONAL AND TECHNOLOGICAL RELIABILITY OF MONOLITHIC CONSTRUCTION

  • Bolotova Alina Sergeevna - Moscow State University of Civil Engineering (National Research University) (MGSU) Assistant, Department of Information Systems, Technology and Automation in Construction, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 1061-1069

This article describes the scientific model information database of defects and irregularities identified in the organization of work in monolithic construction. Monolithic construction is a production system that consists of a number of random events. For each event a significant number of random factors are affected. The author examines and analyzes the characteristics of the technical failures that affect the organizational and technological reliability of building. Use of information technology makes it possible to calculate various indicators of operational efficiency of the process of detection and elimination of defects and failures of the production system. An important criterion in the process of sustainable development is the organizational and technological reliability (OTR), which describes the capabilities of the system to achieve the goal. The author generalized and systematized the available data. The author concludes that it is necessary to develop such organizational and technological solutions that will perform the work in a timely manner, with the required quality, without prejudice to the OTR of monolithic construction. Topicality of the article is due to the need in analysis of the organization of construction works and evaluation of the system of building control in the construction of monolithic reinforced concrete structures, with the aim of preventing the emergence of potential defects and irregularities in monolithic construction. Specialists in the field of risk analysis and assessment, experts and insurance companies, and organizations conducting the assessment can use the technique. Subject: organizational and technological reliability as a criterion for the quality of organization of monolithic construction, which affects the duration of work. Analysis of the interrelations between the index of OTR and technological defects and deviations in the production process by forming a database model has not been studied in detail until now. Materials and methods: for developing a technique for increasing the OTR, a general description of the object, its purpose and functions are presented. The indicators of the quality of the object and the characteristics affecting it are formed into an information database. Further, the parameters of factors and the range of their changes at which the normal functioning of the object is ensured are established. Results: using the method of expert assessments, the influence of the occurrence of certain undesirable events (failures) was quantified and the impact of these events on the achievement of the project objectives (duration of construction, cost, project quality) was assessed. The results of the analysis allow us to quickly assess the criticality of the violations identified, perform their ranking, and make corrective actions in the organization of production. The information presented in the database helps to quickly find the optimal technological solution that positively affects the time-saving. Conclusions: conducted analysis led to the conclusion that it is desirable to use the characteristics of the OTR of monolithic construction for the purposes of improving the quality of production processes and provided the information and the scientific basis necessary for improving the organization of production in civil engineering.

DOI: 10.22227/1997-0935.2017.9.1061-1069

Download