75504 2712-8172 6 24 2011 1-69

RAR RUS 5-11 Saint-Petersburg State University of Architecture and Civil Engineering Rutman Yuriy 605fractal@mail.ru

2-nd Krasnoarmeiskaya St. 4, 190005 St. Petersburg, Russia

Saint-Petersburg State University of Architecture and Civil Engineering Meleshko Vladimir vl-meleshko@yandex.ru Estimation the structure on galloping fluctuation possibility Galloping is self-oscillations of elastic system in wind flow (aeroelastic vibrations). The galloping should be taken into account when designing different structures (pipes, masts, power lines, high-rise buildings, bridges). Existing calculation methods are difficult to realize. Generalized Glowrt-Den-Gartog criterion taking into account mode shape and wind speed instability all along height is offered. ANSYS CFX program for determination the aero dynamical coefficients is used. Functions for approximation and interpolation of aero dynamical coefficients as functions of wind angle of attack are offered. The use of obtained results for calculation of Glowrt-Den-Gartog criterion and determination of galloping fluctuation possibility are shown. 10.5862/MCE.24.4 aerodynamical instability galloping estimation Glowrt-Den-Gartog criterion https://engstroy.spbstu.ru/article/2011.24.1/ meleshko_galopirovaniye.pdf

RAR RUS 12-22 6506522453 0000-0001-8114-1187 Tashkent Financial Institute Abdikarimov Rustamkhan rabdikarimov@mail.ru

60A, A.Temur street, Tashkent city, 100000

"Kitezh" LLC Architecture and Construction Company Zhgutov Vladimir abc.kitezh@gmail.com

St. Petersburg, Russia

Geometrically nonlinear mathematical simulation the viscoelastic gently sloping variable-thickness shells’ dynamical steadiness The problem of viscoelastic isotropic and orthotropic shells steadiness under the axial dynamic load was examined. The behavior of gently-sloping variable-thickness shells and plates under all these factors is not enough investigated and needs further inquiry. Using the Bubnov-Galerkin method, the system of nonlinear ordinary integro-differential expressions in partial derivatives was obtained. The numerical method based on the quadrature rules was used for solving it. The algorithm for the computer solving was obtained. The computer steadiness modeling of the analyzed shells was also held, under varying its physical, mechanical and geometrical parameters. 10.5862/MCE.24.6 gently-sloping variable-thickness shell viscoelasticity dynamical steadiness https://engstroy.spbstu.ru/article/2011.24.2/ zhgoutov_obolochki.pdf

RAR RUS 23-27 Saint-Petersburg State University of Architecture and Civil Engineering Simbort E. e-simbort@mail.ru Comparison of nonlinear dynamic analyses performed by both single and multi degree of freedom system The main principles of seismic-resistant design of buildings and structures allow the propagation of significant plastic deformations under large earthquakes. But the possibility of total collapse should be ruled out. To fulfill these conditions it can be done the comprehensive dynamic plastoelastic analysis using modern software. But full dynamic plastoelastic analysis is very labor-consuming and inconvenient for design decisions. In the present research a nonlinear dynamic analysis of the multi degree of freedom system together with nonlinear single degree of freedom system are used for analyzing the behavior of structures under plastoelastic deformation. The validity of the application of a nonlinear single degree of freedom system is analyzed by comparing the results obtained by single degree of freedom system with the results from nonlinear dynamic analysis of the multi degree of freedom system. In the paper recommendations for application the nonlinear single degree of freedom system are proposed. 10.5862/MCE.24.5 seismic-resistant design nonlinear single degree of freedom nonlinear multi degree of freedom system strength design criterion https://engstroy.spbstu.ru/article/2011.24.3/ simbort_stepeni_svobody.pdf

RAR RUS 28-34 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

Static calculation and analysis of spatial rod system An analytical solution of the spatial elastic statically determinate truss is given. The Maple mathematical system with the inductive method of obtaining solutions for an arbitrary number of rods is used. It allows to estimate the limiting construction properties and to find the characteristic features of truss. The stress and deflection are determined. The solutions of the problem on the rack-truss and the beam-truss are given. It is shown that in some cases due to the constructive design errors the increase in the number of rods under constant load does not lead to a decrease in deflection. The analytical solution reveals this feature. 10.5862/MCE.24.1 space truss induction optimization deflection Maple https://engstroy.spbstu.ru/article/2011.24.4/ kirsanov_sterzhni.pdf

RAR RUS 35-40 M-6585-2013 6508103761 0000-0002-1196-8004 Peter the Great Saint Petersburg Polytechnic University Vatin Nikolai vatin@mail.ru

Polytechnicheskay, 29

Peter the Great St. Petersburg Polytechnic University Kuznetcov Viktor

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Peter the Great Saint Petersburg Polytechnic University Nedviga Ekaterina nck@bk.ru

Polytechnicheskay, 29

Installation errors in calculating large-panel buildings Every year the problem of civil and erection work quality gets sharper in Russia. The article is devoted to solving the identified problem not from the point of organizational and technological aspects of building but from the point of design and calculation. The paper considers the influence of offsetting and axes fractures of wall panels in the process of its installation into large-panel building. Comparative analysis of design schemes that takes into account different types of errors in installation is done. The structure calculation taking into account errors of details installation was made. Obtained efforts in structural elements exceeded allowable values prescribed in the standard documentation. Conclusions about need to consider installation errors (caused by a deviation from the design of vertical structures) in design model were made, including calculation in the CAD software. 10.5862/MCE.24.3 building structures concrete structures precast concrete elements large-panel construction installation error misalignment of bearing structures offsetting and fractures of element axes https://engstroy.spbstu.ru/article/2011.24.5/ nedviga_pogreshnost.pdf

RAR RUS 41-49 B-6662-2019 57204916380 0000-0002-6877-8420 Peter the Great Saint Petersburg Polytechnic University Kozinetc Galina galina4410@yandex.ru

St. Petersburg, Russia

Calculation algorithm of steel-reinforced concrete water passages The article presents three-dimensional finite element modeling method for steel-reinforced concrete penstocks. In the models the allowance is made for the actual material properties manifested upon concrete cracking. The topical problem of developing adequately fitting mathematical models and analysis of stress-strain distribution in structures with deformational anisotropy was solved. The modeling of metal sheathing, reinforcement and fractured concrete was made. Analysis of computational results justified the design decisions. Recommendations on maintenance the penstocks were given. 10.5862/MCE.24.2 steel-reinforced concrete hydraulic structures penstocks; metal sheathing finite element method stiffness matrix Newton-Rafson method cracking strength criteria https://engstroy.spbstu.ru/article/2011.24.6/ kozinets_vodovody.pdf

RAR RUS 50-55 Peter the Great Saint Petersburg Polytechnic University Parashchenko Natalya nata.par@gmail.com

Polytechnicheskay, 29

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

Partially rib precast and cast-in-situ floors with cellular-concrete blocks The object of research is precast and cast-in-situ inserted floor with cellular-concrete items used for reduction of structure weight. The used materials and installation technologies are considered. The aim of this work is analysis of strength and deformability of floor by two different methods: analytical calculation and calculation by finite element method using SCAD. It was shown that the finite element calculation is more precise and also it allows to use armature of lesser diameter that decreases the cost of the floor. For adjustment of given model and life duration of the structure the full-scale tests are necessary. 10.5862/MCE.24.7 rib floor floor structure cellular-concrete items filling aggregate reinforcing calculation https://engstroy.spbstu.ru/article/2011.24.7/ parashenko_perekrytiya.pdf

RAR RUS 56-60 Islamic Azad University Jazayeri Elias eliasjazayeri@gmail.co Islamic Azad University Gorginpour A. Construction of windcatcher and necessity of enhancing the traditional windcatcher In the past without modern facilities and modern equipment for cooling and heating, the architect was obliged to use economical engineering systems that rely on natural energy. This article evaluates one of such economical systems: the windcatcher used in traditional house of Iran. Nowadays the global warming is one of the most concern in the world and the necessity of using the sustainable systems could be a good solution for having a comfort zone with a suitable relative humidity and temperature with lowest fossil fuel consumption. This research has gathered the information about traditional windcatcher and its modern modifications. The advantages and disadvantages of different windcatcher shapes are analyzed. The methods for enhancing its construction are suggested. 10.5862/MCE.24.8 windcatcher badgir zero carbon environment solarwindcatcher https://engstroy.spbstu.ru/article/2011.24.8/ jazayeri_windcatcher.pdf