Construction System Design and Layout Planning. Mechanical Equipment Challenges in Construction

THE USE OF PASSIVE SOLAR HEATING SYSTEMS AS PART OF THE PASSIVE HOUSE

Vestnik MGSU 4/2018 Volume 13
  • Bryzgalin Vladislav Viktorovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Master student, Department of Design of Buildings and 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 .
  • Solov’ev Aleksey Kirillovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Department of Design of Buildings and 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 .

Pages 472-481

Subject: systems of passive solar heating, which can, without the use of engineering equipment, capture and accumulate the solar heat used for heating buildings. Research objectives: study of the possibility to reach the passive house standard (buildings with near zero energy consumption for heating) in climatic conditions of Russia using the systems of passive solar heating in combination with other solutions for reduction of energy costs of building developed in the past. Materials and methods: search and analysis of literature, containing descriptions of various passive solar heating systems, examples of their use in different climatic conditions and the resulting effect obtained from their use; analysis of thermophysical processes occurring in these systems. Results: we revealed the potential of using the solar heating systems in the climatic conditions of parts of the territories of the Russian Federation, identified the possibility of cheaper construction by the passive house standard with the use of these systems. Conclusions: more detailed analysis of thermophysical and other processes that take place in passive solar heating systems is required for creation of their computational models, which will allow us to more accurately predict their effectiveness and seek the most cost-effective design solutions, and include them in the list of means for achieving the passive house standard.

DOI: 10.22227/1997-0935.2018.4.472-481

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ANALYTICAL CALCULATION OF DEFLECTION OF RECTANGULAR SPATIAL ROOF STRUCTURE

Vestnik MGSU 5/2018 Volume 13
  • Kirsanov Mikhail Nikolaevich - National Research University, “Moscow Power Engineering Institute” (MPEI) Doctor of Physical and Mathematical Sciences, Professor, Department of Robotics, Mechatronics, Dynamics and Strength of Machines, National Research University, “Moscow Power Engineering Institute” (MPEI), 14 Krasnokazarmennaya str., Moscow, 111250, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 579-586

Subject: obtaining an analytical solution to the problem of deflection of a spatial structure with an arbitrary number of panels, which remains valid for a wide class of constructions of the proposed structure. Research objectives: the main purpose of this work is to derive dependence of truss deflection on the number of panels, on the magnitude of the load and dimensions of the structure. Materials and methods: the deformability of a truss over rectangular plan with vertical supports on all lateral sides, made of steel or aluminum alloys is estimated by the vertical displacement of the central node, to which the force is applied. The forces in the rods and supports are determined by the method of joints. Generalization of the particular solutions found for a sequence of trusses with various number of panels to an arbitrary number of panels is obtained by induction. All symbolic transformations and solutions are performed in the computer mathematics system Maple. Using special operators of the Maple software, homogeneous linear recurrence equations are derived and solved, which are satisfied by the terms in the sequences of coefficients of the desired formula. Results: the resulting deflection formula constitutes a cubic polynomial expressed in terms of the number of panels. The graphs of the dependence of deflection on the number of panels and on the height are plotted. Formulas for forces in characteristic rods are derived. Conclusions: the proposed model of a statically determinate spatial truss structure with supports all over the contour allows an analytical solution for deflection and its generalization to an arbitrary number of panels. The results are numerically verified and can be used as benchmark cases for estimation of the accuracy of numerical solutions. The obtained formulas are most effective for large number of panels, i.e., when numerical methods based on solving high-order linear systems require significant machine resources and are prone to uncontrolled accumulation of round-off errors.

DOI: 10.22227/1997-0935.2018.5.579-586

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Thermal regime of enclosing structures in high-rise buildings

Vestnik MGSU 8/2018 Volume 13
  • Musorina Tatyana A. - Peter the Great St. Petersburg Polytechnic University (SPbPU) postgraduate student, Hydraulics and Strength Department, Peter the Great St. Petersburg Polytechnic University (SPbPU), 29 Politechnicheskaya s., St. Petersburg, 195251, Russian Federation.
  • Gamayunova Ol’ga S. - Peter the Great St. Petersburg Polytechnic University (SPbPU) Senior lecturer, Department of Construction of Unique Buildings and Structures, Peter the Great St. Petersburg Polytechnic University (SPbPU), 29 Politechnicheskaya s., St. Petersburg, 195251, Russian Federation.
  • Petrichenko Mikhail R. - Peter the Great St. Petersburg Polytechnic University (SPbPU) Doctor of Technical Sciences, Professor, Head of the Hydraulics and Strength Department, Peter the Great St. Petersburg Polytechnic University (SPbPU), 29 Politechnicheskaya s., St. Petersburg, 195251, Russian Federation.

Pages 935-943

Subject of research: the main heat loss occurs through the building fence. In the paper, the object of research is enclosing structures with different thermal conductivity. The problem of moisture accumulation in the wall is quite relevant. One of the main problems in construction is saving on building materials and improper design of building envelope. This in turn leads to a violation of the heat and humidity regime in the wall. This paper presents one of the methods to address this issue. Purpose: description of heat and humidity conditions in the wall fence of high-rise buildings. It is also necessary to analyze the relationship between the thermophysical characteristics. Materials and methods: the temperature distribution in the layers will be analyzed on the basis of the structure consisting of 10 layers; the layer thickness is 0.05 m. Materials with different thermal conductivity were used. Each subsequent layer differed in thermal conductivity from the previous one by 0.01. Next, these layers are mixed. The calculation of the humidity regime includes finding the temperature distribution along the thickness of the fence at a given temperature of the outside air. The quality factor of the temperature distribution is the maximum average temperature. This research are conducted in the field of energy efficiency. Results: the higher the average wall temperature, the lower the air temperature differs from the wall temperature. In addition, the higher the average temperature of the wall, the drier the surface inside the wall. However, moisture accumulates on the surface inside the room. The working capacity of multilayer enclosing structures is determined by the temperature distribution and distribution of moisture in the layers. Conclusions: moisture movement through the fence is due to the difference in the partial pressure of water vapor contained in the indoor and outdoor air. A layer with minimal thermal conductivity should be located on the outer surface of the wall in a multi-storey building. The maximum change in the amplitude of temperature fluctuations is observed in the layer adjacent to the surface by periodic thermal effects. It is also taken into account that the process of heat absorption has a great influence on the temperature change in the thickness of the wall fence to the greatest extent within the layer of sharp fluctuations (outer layer). The Central part of the wall (bearing layer) will be the driest. These calculations are satisfied with the design of the ventilated facade.

DOI: 10.22227/1997-0935.2018.8.935-943

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Calculating model of a frame type planar truss having an arbitrary number of panels

Vestnik MGSU 10/2018 Volume 13
  • Mikhail N. Kirsanov - National Research University “Moscow Power Engineering Institute” (MPEI) Doctor of Phisical and Mathematical Sciences, Professor, Department of robotics, mechatronics, dynamics and strength of machines, National Research University “Moscow Power Engineering Institute” (MPEI), 14 Krasnokazarmennaya st., Moscow, 111250, Russian Federation.

Pages 1184-1192

ABSTRACT Introduction. The subject of the study is the kinematic variability and deformations of a planar statically-determinate elastic truss with a horizontal bolt, lateral supporting trusses and a cross-shaped grid under the action of various types of static loads. The structure has three movable supports and one fixed support. Objectives - derivation of formulas giving the dependence of the deflection of the structure in the middle of the span and the displacement of one of the three movable supports from the dimensions, load and number of panels; analysis of the kinematic variability and derivation of the analytical dependence of the forces in the rods of the middle of the span from the number of panels. Materials and methods. Forces in the rods of the truss are calculated in symbolic form by cutting out nodes using the Maple symbolic and numeric computational environment. In order to calculate the deflection, the Maxwell - Mohr formula was used. Calculation formulas for the deflection and displacement of the support were derived using the induction method based on the results of analytical calculations of a number of trusses with a different number of panels in the crossbar and lateral support trusses. The special operators of the genfunc package for managing the rational generating functions of the Maple system were used to identify and solve the recurrence equations satisfied by the sequences of coefficients of the formulas for deflection and forces. It is assumed that all the rods of the truss have the same rigidity. Results. Several variants of loads on the truss are considered. A combination of panel numbers is found in which the truss becomes kinematically variable. The phenomenon is confirmed by the corresponding scheme of possible velocities. All required dependences have a polynomial form by the number of panels. The curves of the dependence of the deflection on the number of panels and on the height of the truss are constructed in order to illustrate the analytical solutions. Conclusions. The proposed scheme of a statically determinate truss is regular, allowing a fairly simple analytic solution of the deflection problem. The curves of the identified dependencies have significant areas of abrupt changes, which can be used in problems of optimising the design by weight and rigidity.

DOI: 10.22227/1997-0935.2018.10.1184-1192

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Study of parametric oscillations of viscoelastic cylindrical panel of variable thickness

Vestnik MGSU 11/2018 Volume 13
  • Abdikarimov Rustamkhan A. - Tashkent Institute of Finance Doctor of Physical and Mathematical Sciences, Associate Professor, Tashkent Institute of Finance, 60A A. Temur st., Tashkent, 100000, Uzbekistan.
  • Khodzhaev Dadakhan A. - Tashkent Institute of Irrigation and Agricultural Mechanization Engineers (TIIAME) Candidate of Physical and Mathematical Sciences, Associate Professor, Tashkent Institute of Irrigation and Agricultural Mechanization Engineers (TIIAME), 39 Kary-Niyazov st., Tashkent, 100000, Uzbekistan.
  • Normuminov Bakhodir A. - Tashkent Institute of Irrigation and Agricultural Mechanization Engineers (TIIAME) Senior Lecture, Tashkent Institute of Irrigation and Agricultural Mechanization Engineers (TIIAME), 39 Kary-Niyazov st., Tashkent, 100000, Uzbekistan.
  • Mirsaidov Mirziyod M. - Tashkent Institute of Irrigation and Agricultural Mechanization Engineers (TIIAME) Academician of Academy of Sciences of Uzbekistan, Doctor of Technical Sciences, Professor, Tashkent Institute of Irrigation and Agricultural Mechanization Engineers (TIIAME), 39 Kary-Niyazov st., Tashkent, 100000, Uzbekistan.

Pages 1315-1325

ABSTRACT Introduction. Isotropic viscoelastic cylindrical panels of variable thickness under the effect of a uniformly distributed vibration load applied along one of the parallel sides, resulting in parametric resonance (with certain combinations of eigenfrequencies of vibration and excitation forces) are considered. Materials and methods. It is believed that under the effect of this load, the cylindrical panels undergo the displacements (in particular, deflections) commensurate with their thickness. Based on the classical Kirchhoff-Love hypothesis, a mathematical model of the problem of parametric oscillations of a viscoelastic isotropic cylindrical panel of variable thickness in a geometrically non-linear formulation is constructed. Corresponding nonlinear equations of vibration motion of panels under consideration are derived (in displacements). The technique of the nonlinear problem solution by applying the Bubnov-Galerkin method at polynomial approximation of displacements (and deflection) and a numerical method that uses quadrature formula are proposed. The Koltunov-Rzhanitsyn kernel with three different rheological parameters is chosen as a weakly singular kernel. Results. Parametric oscillations of viscoelastic cylindrical panels of variable thickness under the effect of an external load are investigated. The effect on the domain of dynamic instability of geometric nonlinearity, viscoelastic properties of material, as well as other physical-mechanical and geometric parameters and factors (initial imperfections of the shape, aspect ratios, thickness, boundary conditions, excitation coefficient, rheological parameters) are taken into account. Conclusions. A mathematical model and method have been developed for estimating parametric oscillations of a viscoelastic cylindrical panel of variable thickness, taking into account geometric nonlinearity under the action of periodic loads. The results obtained are in good agreement with the results and data of other authors. The convergence of the Bubnov-Galerkin method is verified.

DOI: 10.22227/1997-0935.2018.11.1315-1325

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Reducing risks in the construction enterprise under strategic leadership of the management

Vestnik MGSU 11/2018 Volume 13
  • Victoria G. Borkovskaya - Moscow State University of Civil Engineering (National Research University) (MGSU) , Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 341-1348

Ntroduction. Discusses the issues of risk reduction with strategic leadership in construction area. We focus on leadership strategy in construction from the perspective of reducing risks (environmental, occupational, enterprises and so on) and costs. In strategic management, one of the general strategies of building enterprise goals is aimed at creating competitive advantages. Using a cost leadership strategy in construction, the company focuses on a wide market and produces large quantities of goods, minimizing costs and offering low prices. Subject of research business leaders in construction, top managers, department heads, with characteristic signs of a leader. Materials and methods. When analyzing the questions posed, methods of system analysis, modeling and synthesis were used. Results. Leadership in construction can develop a strategy to reduce risk and improve processes to also result in minimizing costs. The strategy for reducing risk is to carry out activities that reduce either the probability or the damage, or both, from medium to low, from high to medium or low. It was revealed that in order to achieve high results of the economic and corporate activities of an organization, one cannot hope only for a happy coincidence of circumstances. One of the most important conditions for the successful development of any construction company is the interested personnel and quality of leadership. Each success in construction is the result of the well-coordinated and painstaking work of the whole team, as a single mechanism. The smooth functioning of such a mechanism is ensured by the team, which is formed by the leader. In the context of globalization of markets, it is not enough for the head of an organization to be a leader, in the traditional sense. A modern leader in construction must be an ideologue, strategist and technologist in one person. The presence of a complex of three qualities is a strategic leadership. Conclusion. It is determined that strategic leadership in construction is not a fashionable tendency of the denomination of classical leadership, but an inherent need for long-term planning of the organization’s activities. One of the main consequences of strategic leadership in construction is the reduction of enterprise risks to facilitate and maybe guarantee the success of a construction company.

DOI: 10.22227/1997-0935.2018.11.1341-1348

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Stationary temperature field in multi-layered rods with discontinuous of cross section width

Vestnik MGSU 1/2019 Volume 14
  • Mishchenko Andrey V. - Novosibirsk State University of Architecture and Civil Engineering (Sibstrin) (NSUACE (Sibstrin)) Doctor of Technical Sciences, Associate Professor, Professor of the Department of Structural Mechanics, Novosibirsk State University of Architecture and Civil Engineering (Sibstrin) (NSUACE (Sibstrin)), 113 Lenigradskaya st., Novosibirsk, 630008, Russian Federation.

Pages 12-21

Introduction. Presents a method for modeling a two-dimensional stationary temperature field in a layered rod. The peculiarity of the structure of the rod is the presence of discontinuity of the width of the cross section in the direction of heat flow and multilayer. Identification of the temperature field in such rods is a necessary step in solving the problem of thermoelasticity. The relevance of the problem lies in the development of analytical methods for analysis layered rods of complex geometric shape with thermal effects, with acceptable computational complexity and necessary accuracy. Materials and methods. For a multilayer rod, a method for constructing an approximate solution of the Dirichlet stationary heat conduction problem with a transverse heat flow direction is considered. Within each layer, the temperature distribution function is represented as a sum of two functions. The first function, linear in the direction of the heat flow, reflects the exact solution of the problem for a rectangular layered section. The second function is the correction nonlinear function of two variables. It describes the nonlinear distortions of the temperature field due to the presence of discontinuities in the width of the cross section. The correction function, according to the Fourier method, is represented as a product of a given coordinate function and the sum of the sought amplitudes caused by the width breaks. The functions of the effect of breaking the width on temperature fields in adjacent layers are introduced. An approximate formulation of the Dirichlet problem with integral conjugation conditions on interlayer boundaries is formulated. Results. The parameters of the stationary temperature field were calculated for a seven-layer section of a T-shaped form with alternating layers of carbon and steel. Testing the results of the Ansys program showed good qualitative and quantitative correspondence of two-dimensional temperature fields. Conclusions. The obtained solution satisfactorily describes the temperature field in the cross section of a layered rod in the vicinity of its geometric features. The method is characterized by acceptable laboriousness and accuracy suitable for solving the problem of thermoelasticity of a layered rod.

DOI: 10.22227/1997-0935.2019.1.12-21

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Numerical and experimental investigations of steel-concrete beams with thin-walled section

Vestnik MGSU 1/2019 Volume 14
  • Zamaliev Farit S. - Kazan State University of Architecture and Engineering (KSUAE) Candidate of Technical Sciences, Professor, Associate Professor of Department of Metal Structures and Testing of Structures, Kazan State University of Architecture and Engineering (KSUAE), 1 Zelenaya st., Kazan, 420043, Russian Federation.

Pages 22-32

Introduction. Conducted is to the evaluation of the stress-strain state of the steel-concrete beams with thin-walled section. In recent times, steel-reinforced concrete structures have become widely used in civilian buildings (beams, slabs, columns). Thin-walled section have not found wide application in steel concrete structures, unlike steel structures. Presents the results of numerical studies of beams consisting of concrete, anchors and steel beams. Two investigating of the location of anchors are given. Numerical investigations are presented of steel-concrete beams with thin-walled section based on numerical studies. Testing procedure and test result are given. Results of calculations, comparison of numerical and experimental studies are presented. Materials and methods. For full-scale experiments, steel I-beams with filling of side cavities with concrete were adopted, screws are used as anchor ties, with varied both the lengths and their location (vertically and obliquely). As steel curved C-shaped steel profiles were used steel profiles from the range of the company “Steel Faces”. ANSYS software package was used for computer modeling. A total of 16 steel concrete beams were considered, for which the results of strength and stiffness evaluation were obtained in ANSYS. Results. The data of the stress-strain state of beams on the basis of computer simulation are obtained. The results are used for the production of field samples. Data of computer simulation are compared with the indicators of field experiments. Conclusions. The stress-strain state of steel-concrete structures was studied on the basis of numerical and experimental data. The proposed calculation method gives good convergence with the experimental data. Anchor connections made from self-tapping screws can be used in studies for modeling in steel-concrete beams structures and other anchor devices, ensuring the joint operation of concrete and steel profiles in structures.

DOI: 10.22227/1997-0935.2019.1.22-32

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Nonlinear calculation of reinforced concrete structures to the impact of the air shock wave

Vestnik MGSU 1/2019 Volume 14
  • Savenkov Anton Y. - АO «Atomenergoproyekt» Lead Engineer, АO «Atomenergoproyekt», 7 Bakuninskaya st., Moscow, 105005, Russian Federation.
  • Mkrtychev Oleg V. - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor of Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 33-45

Introduction. Researched methods of accounting for the nonlinear operation of reinforced concrete structures on the example of an industrial structure, when exposed to an air shock wave using modern software systems based on the finite element method. The calculation of reinforced concrete construction to the impact of an air shock wave, if no increased requirements for tightness are presented to it, in accordance with current regulatory documents, must be carried out taking into account the elastic-plastic work, crack opening in the stretched zone of concrete and plastic deformations of reinforcement are allowed. Reviewed by new coupling approach to determining the dynamic loads of a shock wave, implemented in the LS-DYNA software package, which allows to take into account the effects of a long-range explosion and wave-wrapping around a structure. Materials and methods. The study of the stress-strain state of the structures was carried out using numerical simulation. For the nonlinear equivalent-static method, a step-by-step calculation algorithm is used, with gradual accumulation and distribution of stresses, implemented in the LIRA-SAPR software package. For the nonlinear dynamic method, the Lagrangian-Eulerian formulation is used using the methods of gas dynamics in the LS-DYNA software package. Results. As a result of numerical simulation, the following was done analysis of existing methods of nonlinear calculations; analysis of the existing loads during the flow of shock waves around the structure; analysis of the forces and movements in the bearing elements, as well as pictures of the destruction of concrete and reinforcement. Conclusions. According to the results of the comparison of the two approaches, conclusions are drawn about the advantages and disadvantages of the methods. Advantages of nonlinear dynamic calculation methods are noted compared to the equivalent-static ones. Use of the combined approach to the description of the shock wave front gives a reduction in time and allows us to describe the interaction of the wave with the structure with sufficient accuracy. The findings indicate the relevance of the study and provide an opportunity to move to more reasonable computational models.

DOI: 10.22227/1997-0935.2019.1.33-45

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