75504 2712-8172 Magazine of Civil Engineering 5 40 2013 1-150
RAR RUS 5-19 15730895100 http://orcid.org/0000-0003-3251-3356 Saint Petersburg State University of Industrial Technologies and Design Gorshkov Alexander alsgor@yandex.ru
St. Petersburg, Russia
 M-6585-2013 6508103761 0000-0002-1196-8004 Peter the Great Saint Petersburg Polytechnic University Vatin Nikolai vatin@mail.ru
Polytechnicheskay, 29
 Properties of the wall structures made of autoclaved cellular concrete products on the polyurethane foam adhesive The article presents information on a test experiment for the construction of masonry fragments made of autoclaved cellular concrete products (ААС blocks) on the polyurethane adhesive and the ensuing structural, thermal and technological tests of this type of masonry in specialized laboratories and testing facilities. It is shown that the use of polyurethane foam adhesive to bond the concrete blocks in the masonry walls is technically and economically feasible. On the basis of the tests it was concluded that the laying of concrete blocks on the polyurethane adhesive may be used in the construction of non-load bearing interior and exterior walls of buildings, including the filling of the external frame openings of monolithic buildings with floor bearing of the masonry on load bearing monolithic floors (with appropriate justification of the settlement). 10.5862/MCE.40.1 autoclaved aerated concrete (ААС) one-component polyurethane adhesive thermal conductivity strength of masonry in compression fire resistance breathability performance of works https://engstroy.spbstu.ru/article/2013.40.1/ 01.pdf
RAR RUS 20-27 Branch of RUE Institute BelNIIS – Scientific-technical Centre Derkach Valeriy v-derkatch@yandex.ru
267/2, Moskovskaya str., Brest, 224017 Belarus
 Joint action of masonry filling and monolithic reinforced concrete frame The problem of design and detailing of monolithic buildings, taking into account the interaction of the masonry filling and frame members is considered. The results of numerical and experimental researches of the masonry filling behavior at the frame twist and deflection of the supporting structures have been presented. It is shown that the filling at the frame twist causes a redistribution of stresses in the columns and floor slabs, that can both have positive and negative effect on its stress-strain state. The necessity of adjusting the standards concerning the limits of floor deflections, against which the masonry walls and partitions abut, has been noted. It is shown that ignoring the joint action of stone filling and skeleton can lead to excessive consumption of materials in the construction of monolithic reinforced concrete buildings, to the additional energy costs and higher prices of construction or, conversely, to an unexpected limit state of infilling and frame members. 10.5862/MCE.40.2 masonry filling building frame interaction limit state durability problem of design https://engstroy.spbstu.ru/article/2013.40.2/ 02.pdf
RAR RUS 28-37 57191530761 0000-0002-4765-5819 Moscow State University of Civil Engineering (National Research University) Alekseytsev Anatoly aalexw@mail.ru
Moscow, Russia
 Evolutionary optimization of steel trusses with the nodal joints of rods This article describes the process of constructing a genetic parametrical-optimization algorithm of trusses with the possibility of account the cost of manufacturing the nodal joints of rods. Accounting nodal joints in the process of parametric design synthesis will allow finding bearing systems with rational cost of their production. Parametric optimization was performed on the basis of modified genetic algorithm with constraints on the strength, stiffness and stability of the bearing system. The multipoint crossover and mutation operators and weakly interacting populations were used. The objective function takes into account the specific manufacturing of nodal joints for trusses with profiles of sections as binary angles. The cost of nodes is calculated on the basis of labor costs and materials used in the design of welded joints. А computational scheme for optimizing steel trusses of rods with profiles as paired angle sections and welded nodal joints is developed. The proposed iterative procedure is based on an efficient evolutionary algorithm for parametric synthesis of bearing systems that takes into account the valuation of materials and labor cost for the production of the structure. The example of optimal designing a secondary truss in frame building is considered. The solutions obtained as a result of optimization, considering the cost of nodes and not considering it, are compared. The above example confirms the efficiency of the proposed computational procedures. 10.5862/MCE.40.3 evolutionary modeling elitism parametric optimization trusses genetic operators weakly interacting populations finite element analysis the angle sections the joints of rods https://engstroy.spbstu.ru/article/2013.40.3/ 03.pdf
RAR RUS 38-43 Technical University in Košice Al Ali Mohamad mohamad.alali@tuke.sk Technical University in Košice Tomko Michal michal.tomko@tuke.sk Technical University in Košice Badak Martin Analysis of the resistance of thin-walled cold-formed compressed steel members with closed cross-sections. Part 1 From the material and geometric point of view, the thin-walled cold-formed profiles have specific specialties, which their design must responsibly take into account. In the terms of their resistance, an important issue is the effectiveness of mutual interaction between several webs. The local stability requirements related to unfavourable buckling effects of their compressed parts are very significant. Favourable effects, related to membrane stresses and post-critical behaviour are also important. Different calculation procedures with different results in the relevant standards and their confrontation with experimental results indicated the need for further investigation of post-critical behaviour of these members. The paper is divided into two parts. Part 1 presents fundamental information about experimentaltheoretical research oriented to determinate the resistance of thin-walled compressed steel members. The investigated members had closed cross-sections made from homogeneous materials. The theoretical analysis in this research is oriented to determinate the resistance of mentioned members according to European and Slovak standards, while the experimental investigation is to verify the theoretical results and to investigate the behaviour of mentioned members during the loading process. Part 2 will be focused on the numerical analysis of the results, as well as on the 3D-modelling and simulation of experimental tests. 10.5862/MCE.40.4 thin-walled web cold-formed profiles initial imperfections https://engstroy.spbstu.ru/article/2013.40.4/ 04.pdf
RAR RUS 44-51 Peter the Great St. Petersburg Polytechnic University Nazmeeva Tatiana naztv@mail.ru
Saint Petersburg, Russia
 Bearing capacity of compressed continuous and perforated thinwalled steel members of C-shaped cold-formed profiles Nowadays there is steady rising demand for thin-walled light-weight steel structures. But the shortage of relevant standards on their design and use taking into account Russian conditions leads to the current situation when thin-walled light-weight steel structures are used according to the recommended guidelines of thin-walled structures’ producers. The author performed numerical and experimental investigations on general stability and bearing capacity of members of different length which are made of C-shaped profile and C-shaped perforated profile. The main aim of the investigations was to receive a reliable engineering methodology of their calculation. The author developed the testing methodology and designed two test beds С-12 (1200mm/20t) and В-50 (2200mm/50t) to perform the experimental investigation. Numerical solution for stability of thin-walled member made of C-shaped profile was received during the numerical simulation done in PLM Femap 10.1 Nastran. Subsequently the processing of research results will be continued in order to get the corresponding dependences for development of method for calculating thin-walled members under compression. 10.5862/MCE.40.5 cold-formed profile test bed bearing capacity local buckling thin-walled members numerical simulation https://engstroy.spbstu.ru/article/2013.40.5/ 05.pdf
RAR RUS 52-58 H-9967-2013 16412815600 0000-0002-8588-3871 National Research University "Moscow Power Engineering Institute" Kirsanov Mikhail mpei2004@yandex.ru
14, Krasnokazarmennaya, 111250 Moscow, Russia
 National Research University “The Higher School of Economics” Andreyevskaya Tatyana mpei2004@yandex.ru Analysis of the effect of elastic deformation of the mast on the positioning of antenna and radar equipment The influence of the eccentricity and the position of the load on the radar mast is studied. The mast is a statically determinate truss, consisting of three identical plane trusses connected to the regular truncated pyramid. Vertical truss is divided into n zones of equal height. The load is reduced to the nodes of the upper boom of the mast. The analytical solution for the forces in the spatial truss rods for an arbitrary number of horizontal contours, and the expression for the deflection under the assumption that the angles of deviation from the vertical of struts are small, are given. The resulting approximate and exact analytical solutions for the deflection under the action of horizontal load allow optimization of the construction. One of the possibilities for optimization is the redistribution of the material between the elements of the construction. An analytical solution of this problem is found. The inductive method with the support of a computer algebra system Maple is used. 10.5862/MCE.40.6 strain truss mast positioning antenna radar https://engstroy.spbstu.ru/article/2013.40.6/ 06.pdf
RAR RUS 59-68 S-1676-2017 6507460407 0000-0002-8907-7869 Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Mirsaidov Mirziyod theormir@mail.ru
39, Kori Niyoziy St., Tashkent, Uzbekistan, 100000
 55586710000 0000-0002-6498-5043 Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Sultanov Takhirjon tz-sultanov@mail.ru
Tashkent, Republic of Uzbekistan
 Tashkent State Technical University Sadullaev Sh. An assessment of stress-strain state of earth dams with account of elastic-plastic, moist properties of soil and large strains Mathematical statement, methods and algorithms of assessment of stress-strain state of earth dams with account of elastic-plastic, moist properties of soil and finite strain, structural heterogeneity of structures under static effects, are presented in the paper. Stress-strain state of three erected structurally heterogeneous earth dams of different heights was studied with account of elastic-plastic, moist properties of soil and large strains in a structure. In the process of investigation it was revealed, that an account of elastic-plastic properties and moisture content of soil, as well as large strains and heterogeneity of a structure, qualitatively and quantitatively vary the state of high earth dams, increasing arch effect for vertical stresses and horizontal stresses in the base of a dam, changing stress state of a structure on the whole and bringing the drop in pressure on the contacts of different parts of a structure. 10.5862/MCE.40.7 earth dams heterogeneity of a structure elastic-plasticity and moisture content of soil finite (large) strains stress-strain state strength https://engstroy.spbstu.ru/article/2013.40.7/ 07.pdf
RAR RUS 69-75 Vologda State University Utkin Vladimir UtkinVoGTU@mail.ru
Vologda, Russia
 The reliability calculation of foundations under eccentric load in the operation phase The new method of the reliability calculation of buildings and structures’ earth foundations based on limited statistical information on controlled parameters in the operation stage is considered. The reliability is calculated by criterion of foundation deformations (settlement) in the presence of load eccentricity of the foundation and using possibility distribution functions for the description of fuzzy variables. New approach to the reliability calculation of a foundation bed is offered with describing eccentricity characteristic as random variable by the probability distribution law and properties of soil – by the possibility characteristic. The way for determination of eccentricity value of load on the foundation bed by measurement of deformations in the foundation material at the expense of unloading the part of the foundation on the area with resistance strain gages is considered. Reliability as the probability of failurefree operation of the foundation is characterized by the interval with minimum and maximum values. 10.5862/MCE.40.8 earth foundation foundation settlement edge value load eccentricity design resistance probability possibility reliability interval https://engstroy.spbstu.ru/article/2013.40.8/ 08.pdf
RAR RUS 76-85 Peter the Great St. Petersburg Polytechnic University Kolosova Galina gala.kolosova2013@yandex.ru
Saint Petersburg, Russia
56091980300 0000-0003-3850-424X Peter the Great St. Petersburg Polytechnic University Lalin Vladimir vllalin@yandex.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 JSC “Lenhydroproject” Kolosova A. The effect of construction joints and cracks on the stress-strain state of the arch-gravity dam The aim of the paper was to review the stress-strain state of an arch-gravity dam of the SayanoShushenskaya HPP, which has construction and contact joints. The problem is solved by finite element method using software package SOFiSTiK. The finite element model of the "dam – foundation – abutments" created at the department "Structural mechanics and theory of elasticity" of SPbSPU is described. Three-dimensional 8-nodal finite elements were used. Joints in the dam body were modeled by unilateral constraints. The schemes of unilateral constraints location in contact and construction joints are presented. To assess the correctness of the finite element model operation the calculated radial movements at the crest of the dam was compared with the field data. Satisfactory agreement of values confirms the correctness of modeling system behavior by the design scheme. According to the calculation results from the action of the hydraulic load we can conclude that account of the disclosure joints leads to a significant increase in the calculated stresses in the dam body. 10.5862/MCE.40.9 hydroelectric dam construction joints unilateral constraint software package SOFiSTiK finite element model displacement and stress at the points of the dam https://engstroy.spbstu.ru/article/2013.40.9/ 09.pdf
RAR RUS 86-99 Petersburg State Transport University Benin Andrey benin.andrey@mail.ru Dresden University of Technology Semenov Artem Semenov.Artem@googlemail.com Peter the Great Saint Petersburg Polytechnic University Semenov Sergey ssgrus@gmail.com
Polytechnicheskay, 29
 6701751705 0000-0002-7889-1996 Peter the Great Saint Petersburg Polytechnic University Boris Melnikov kafedra@ksm.spbstu.ru
Polytechnicheskay, 29
 Simulation of degradation of bond between reinforcing bar and concrete. Part 1. Models with account of the discontinuity The problem of pulling the reinforcing bar from the concrete block is urgent for the practice, as it represents the most widespread method of experimental evaluation of characteristics of reinforcedconcrete bond behavior, which are necessary for an estimation of the strength and durability of reinforced concrete structures. Fracture process of bonds at pulling the rebar from the concrete is a complex multistep process, accompanied by the presence of inhomogeneous and inelastic deformation, a rupture of adhesive bonds, the initiation and propagation of cracks of different shape and orientation, the presence of contact and tribological phenomena. The nonlinear finite-element solutions of the problem of pulling the reinforcing bar from the concrete block have been obtained with using various models of bond behavior and concrete cracking. The comparison of obtained numerical results with experimental data has been presented and discussed. The first part of the article is devoted to the models taking into account the discontinuity of the connection, while the second part is concerned with the models without explicitly taking into account of discontinuities. 10.5862/MCE.40.10 reinforced-concrete bond degradation mathematical models finite element simulation pullout test damage failure https://engstroy.spbstu.ru/article/2013.40.10/ 10.pdf
RAR RUS 100-106 Saint-Petersburg State University of Architecture and Civil Engineering Karpov Vladimir vvkarpov@lan.spbgasu.ru St. Petersburg State University of Architecture and Civil Engineering Semenov, Alexey sw.semenov@gmail.com Mathematical model of deformation of orthotropic reinforced shells of revolution In recent years there are more and more structures made of composite materials, especially in the form of thin-walled shells, being applied in various fields of technology. When using composite materials such as concrete or fiberglass, reinforcing elements are often placed along the axes of the curvilinear coordinate system of the shell, and in this case, the structure can be considered as orthotropic. There are a lot of papers on the calculation of orthotropic shells, but they do not adequately investigate a number of important factors that influence the stress-strain state of the shell and its stability. In particular, the calculation of reinforced shells does not take into account such factors as in-plane shear, shear and torsional stiffness of ribs, etc. The paper presents the mathematical model of deformation of thin orthotropic shells of revolution, based on the model of Timoshenko – Reissner. The model takes into account the design of reinforcement with the shear and torsional stiffness of the ribs, geometric nonlinearity and also the irregular shape of the shell. Possibility of application of methods and algorithms which are used in the study of isotropic shells is shown. The presented model investigates the stress-strain state and stability of thin orthotropic reinforced shells of revolution more adequate. 10.5862/MCE.40.11 shell the mathematical model the total strain energy functional orthotropy reinforced shells shells of revolution https://engstroy.spbstu.ru/article/2013.40.11/ 11.pdf
RAR RUS 107-115 State Marine Technical University, Saint-Petersburg Kovaleva Nadezhda balloun@yandex.ru Saint-Petersburg State University of Architecture and Civil Engineering Rutman Yuriy 605fractal@mail.ru
2-nd Krasnoarmeiskaya St. 4, 190005 St. Petersburg, Russia
 LLC “Geoinzhproekt” Davydova G. Determination of optimal damping parameters for seismic isolation systems If seismic isolation system consists of elastic-damping bearings, it transforms protected object into the flow-frequency system. Thus, damping in SIS should be high enough to eliminate resonance effect. Therefore application of damping makes a problem of its parameters optimization relevant. Optimization criteria for damping parameters of seismic isolation systems within the stochastic problem definition have been stated in the article. Search methods of optimal parameters for various tasks descriptions (target functions) have been developed. Both synthesized accelerograms and real accelerograms of earthquakes have been used as external actions. Both linear and nonlinear damping model including seismic isolation system have been taken into consideration. Search algorithms of optimal parameters have been worked out in different cases. Proceeded analysis results can be applied to design damping in seismic isolation systems. 10.5862/MCE.40.12 seismic isolation optimal damping parameters seismic motions synthesized accelerograms spectral density dispersion https://engstroy.spbstu.ru/article/2013.40.12/ 12.pdf
RAR RUS 116-124 Tadeusz Kościuszko Cracow University of Technology Fialko Sergey sfialko@riad.pk.edu.pl About analysis of large problems of structural mechanics on multi-core computers The sparse direct solvers as well as iterative methods are considered for analysis of large-scale finite element problems of structural mechanics on multi-core computers. The parallel preconditioned conjugate gradient method, based on sparse incomplete Cholesky factoring “by value” approach, is presented. The efficiency of block substructure multifrontal method BSMFM, PARFES (Parallel Finite Element Solver), proposed iterative method PSICCG (Parallel Sparse Incomplete Cholesky Conjugate Gradient) and conventional ICCG0 method are compared. PARFES is proved much more effective than multifrontal method. When the amount of RAM is insufficient, the sparse direct methods produce lots of I/O operations, therefore, an iterative method is often more preferable. 10.5862/MCE.40.13 finite element method sparse direct solvers preconditioned conjugate gradient method incomplete Cholesky factorization multi-core computers https://engstroy.spbstu.ru/article/2013.40.13/ 13.pdf