75504 2712-8172 3 21 2011 1-93

RAR RUS 4-20 KBT Ltd Teplykh Andrey ateplykh@mail.ru Application of shell and solid elements in the analysis of building steel designs with software SCAD and Nastran accounting for geometrical and physical nonlinearity Computational models using shell finite elements have a number of advantages in comparison with beam models, and their application can sometimes give essential improvements in design optimization, in the speed, presentation and simplicity of obtaining results using modern software.  The following calculations were done in the paper: durability of ribs of I-section components in assumption of elastic behavior of the material; bearing ability of beams and frames based on welded double tees of variable cross-section in the supercritical area of rib behavior. In manufacture of steel constructions with flanged joints with high-strength prestressed bolts, there often appear mushroom-shaped residual deformations in flanges. The calculation method with the use of solid element models introduced in the paper allows to justify doing without laborious and costly milling of the flanges. 10.18720/MCE.21.4 settlement model rod finite element shell finite element stability of the web flexible web elastic-plastic material bilinear material nonlinear deformation analysis flange residual deformations solid finite element contact problem https://engstroy.spbstu.ru/article/2011.21.1/ teplyh_scad.pdf

RAR RUS 21-27 JSC The B.E. Vedeneev VNIIG Girgidov Armen ghirghidovaa@vniig.ru Hybrid simulation in hydrotechnical facilities design and FLOW-3D as a tool its realization Hydraulic phenomena on hydraulic facilities are in most cases unique; therefore their modeling become more difficult. Hybrid simulation is one of the ways to solve the problem. It combines physical and computational modeling. The article gives examples carried out in JSC The B.E. Vedeneev VNIIG of hybrid modeling. Using the com-mercial CFD solution – FLOW-3D ® as a numerical simulation tool for the design Hydro power plant spillways is shown. Testing of the software complex FLOW-3D ® was carried out for both the laboratory and for field studies. Comparisons of numerical results to laboratory and field studies are well agreed. Using the САВ solution FLOW-3D ® eliminates the emerging scale effects and it determines the numbers of parameters are not available for physical modeling. Creating design methodology based on hybrid modeling of hydrotechnical facilities will simplify to make decisions at the early design stages. 10.18720/MCE.21.5 hydrotechnical facilities design hybrid simulation CFD software complex FLOW-3D® https://engstroy.spbstu.ru/article/2011.21.2/ girgidov_flow3D.pdf

RAR RUS 28-31 Saratov State Technical University Filatov Valeriy filatovvn@yandex.ru Linkorn Ltd. Abrosimov A. Mathematical modelling deflected mode of flexible shells anchored along the contour Thin walled cold-formed steel structures became popular solution for low-rise buildings, mansards, walling of multistorey buildings. The modeling of perforated thin-walled cold-formed profile is rather difficult, especially for profiles with irregular shape apertures used in racking systems. The main aim of this work is creating the methods of finite element modeling such profiles. The result of work is a method of construction of profile with given section, aperture formation and construction of final calculation model. The software package SCAD Soft was used for modeling. 10.18720/MCE.21.3 approximating functions flexible shells modeling deflected mode of shells https://engstroy.spbstu.ru/article/2011.21.3/ filatov_obolochki.pdf

RAR RUS 32-35 Peter the Great Saint Petersburg Polytechnic University Shatov Dmitriy homeshat@mail.ru

Polytechnicheskay, 29

Finite element modelling of open section perforated thin-walled studs made from thin-walled steel profiles The share of constructions made from thin-walled steel profiles grows in Russia every year, however the standard base and quality of calculations remain at low level. However nowadays there is an active scientific work on designing and improving methods of calculations, introduction of new ideas and aspects and their automation. The purpose of the work is the further development of a theoretical and practical component of numerical methods for the solution of problems of linear deformation of thin-walled profiles. Article is devoted to research of work of thin-walled profiles, applying methods of the numerical analysis. In the work deformations and forms of buckling of an open section perforated thin-walled stud, calculated by a method of finite elements are considered. The obtained data is compared with results of tests of the same profiles made in Dortmund technical university in 2009 under the direction of professor Diter Ungerman. The research has shown that finite element method gives us probable results and shows an expected tendency. The difference in results is 10,2 %. 10.18720/MCE.21.1 thin-walled profile stud deformations buckling element stress load https://engstroy.spbstu.ru/article/2011.21.4/ shatov_KEM.pdf

RAR RUS 36-46 Peter the Great Saint Petersburg Polytechnic University Gordeeva Anastasiya gordeana@mail.ru

Polytechnicheskay, 29

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

Polytechnicheskay, 29

Finite element calculation model of thin-walled cold-formed profile in software package SCAD Office Thin walled cold-formed steel structures became popular solution for low-rise buildings, mansards, walling of multistorey buildings. The modeling of perforated thin-walled cold-formed profile is rather difficult, especially for profiles with irregular shape apertures used in racking systems. The main aim of this work is creating the methods of finite element modeling such profiles. The result of work is a method of construction of profile with given section, aperture formation and construction of final calculation model. The software package SCAD Soft was used for modeling. 10.18720/MCE.21.2 modeling,perforated profile light steel thin walled structure SCAD Office https://engstroy.spbstu.ru/article/2011.21.5/ gordeeva_profil.pdf

RAR RUS 47-52 Cherepovets State University Kurazhova Veronika veroniks07@mail.ru Peter the Great St. Petersburg Polytechnic University Nazmeeva Tatiana naztv@mail.ru

Saint Petersburg, Russia

Node connections of cold-formed steel structures The article is comparative analysis of node connections in cold-formed structures. Welded, glued, screwed, rivet, bolted connections are examined. Peculiarities of bolted connections are considered, comparison of calculation by various techniques is done. The comparative economic analysis is done. Conclusion about expediency of prompt working out the Standard base in Russia for each of connections is made. 10.18720/MCE.21.9 cold-formed structures CFS node connections bolts screws rivets https://engstroy.spbstu.ru/article/2011.21.6/ kurazhova_uzly.pdf

RAR RUS 53-58 Peter the Great St. Petersburg Polytechnic University Kuznetcov Viktor

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

Peter the Great Saint Petersburg Polytechnic University Chen S. chen_xiating@mail.ru

Polytechnicheskay, 29

Sliding girt with fluoroplastic for earthquake-proof building Destruction of buildings is one of the principal consequences of earthquakes. Traditional antiseismic design methods based on the structure reinforcing are not always effective. The aim of the work was creating the structure solution of active seismic insulation and evaluation the effectiveness of its use in a foundation. The active method of earthquake proof stipulates decrease seismic loads on erections due to the regulation their dynamic characteristics in time of oscillation process under earthquake. Simulation methods of sliding girt made from fluoroplastic and building relocations under earthquake were elaborated in system SCAD. The research showed that this method decreases the probability of building crush and reduce the amount of armature. 10.18720/MCE.21.8 seismic insulation active method of seismic protection sliding girt fluoroplastic calculation model of seismic insulation https://engstroy.spbstu.ru/article/2011.21.7/ chen_seismo.pdf

RAR RUS 59-70 6506522453 0000-0001-8114-1187 Tashkent Financial Institute Abdikarimov Rustamkhan rabdikarimov@mail.ru

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

Tashkent Institute of Irrigation and Melioration Eshmatov Kh. Tashkent Institute of Irrigation and Melioration Bobanazarov Sh. Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Khodzhaev Dadakhan khodzhaevda@mail.ru Tashkent Institute of Irrigation and Melioration Eshmatov B. Mathematical modelling and calculation of hydraulic engineering constructions such as dam-plate in view of hydrodynamical pressure of water and seismic loading In present paper the problem about the forced vibrations of hydraulic engineering constructions such as dams is considered in view of hydrodynamical pressure of water and seismic loading. The equations of movement concerning function of deflections are described by the integral-differential equations (IDE) in partial derivatives.  As a kernel of relaxation it is used weakly singular kernel of Koltunov-Rzanitsyn type. By means of Bubnov-Galerkin method based on polynomial approximation of deflections, the problem is reduced to the solution of nonlinear ordinary IDE, where an independent variable is time.  Decisions of IDE are determined by the numerical method based on exception of feature in a kernel. On the basis of this method the algorithm of the numerical decision is described.  The analysis of influence of viscoelastic and nonlinear properties of a material, and also hydrodynamical pressure of water on deflected mode a dam-plate is carried out. 10.18720/MCE.21.6 hydraulic engineering constructions concrete dam seismic loading hydrodynamical pressure of water viscoelasticity nonlinear vibrations integro-differential equations Bubnov-Galerkin method kernel of relaxation https://engstroy.spbstu.ru/article/2011.21.8/ abdikarimov_plastiny.pdf

RAR RUS 71-74 6602693779 Peter the Great St. Petersburg Polytechnic University Petinov Sergey sergei.petinov@gmail.com

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

6701751705 0000-0002-7889-1996 Peter the Great Saint Petersburg Polytechnic University Boris Melnikov kafedra@ksm.spbstu.ru

Polytechnicheskay, 29

Effect of Prestrain on Fatigue Crack Growth in Low-carbon Steel The current procedures of fatigue design of marine pipeline components allow for extending service life by considering a certain portion of the crack growth well before it turns into the instable phase. In structural components of transport systems material may undergo plastic pre-strain during the construction. The effect of pre-strain on the crack growth may be different depending on the material properties.  Fatigue crack propagation was examined in testing symmetrically notched specimens machined from pre-strained steel plate coupons. Non-simultaneous crack initiation and propagation at the notches was reduced to symmetrical scheme by a simple coordinate transformation procedure.  It was found that tensile pre-strain up to 0.01 did not substantially change the crack growth rate related to the stress intensity factor scale. Further increase of plastic pre-strain of material up to 0.15 caused almost two-times slowing down the crack growth rate compared to that of virgin material. 10.18720/MCE.21.7 plastic pre-strain of steel fatigue crack growth rate effect of pre-strain on crack propagation https://engstroy.spbstu.ru/article/2011.21.9/ petinov_cracks.pdf

RAR RUS 75-80 "Kitezh" LLC Architecture and Construction Company Zhgutov Vladimir abc.kitezh@gmail.com

St. Petersburg, Russia

In response to professor Karpov, V.V. (About the scientific priority of the structural anisotropy method for ribbed shells as well as on functional, describing the material’s creeping) A response is given to prof. V.V Karpov, who publicly and unreasonably blaimed V.M. Zhgoutov for plagiarism of his scientific work. It was ascertained, that all the correlations, having pertinence to the structural anisotropy method for ribbed shells, given in V.V. Karpov’s work, came after more common and complicated correlations obtained by V.M. Zhgoutov, and present their particular case. It is shown, that the scientific priority on the functional, describing the material’s creeping of the ribbed shells, also must be owned by V.M. Zhgutov, not by V.V. Karpov, which leads from the publications’ dates and the common foundation of calculations. 10.18720/MCE.21.10 ribbed shells structural anisotropy method isotropic and anisotropic material functional describing the material’s creeping https://engstroy.spbstu.ru/article/2011.21.10/ zhgoutov_disclaimer.pdf