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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Girfanov I.S. – candidate of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Jumanov V.A. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1
Title of the articleDetermining the length of the stiffeners, that amplifies nodal zone of farms and structures made of thin-walled profiles
Abstract.This article contains issues and methods of prognosis of the local buckling effects and cross section distortions in nodal zones of the thin shell elements of the spatial lattice structures and trusses with cold formed members. The issue is as follows. Load bearing capacity calculations of connections in the mentioned structures, where braced members usually are joined together, wouldn't be correct to derive from equations of a structure mechanic, which based on a hypothesis of a flat cross sections, hence there is need in more precise approaches. To achieve more accurate results, variation method of dr. Vlasov written in deformations was used. By solving integral equations, obtained with that method, constants of integration were defined with unknown values of length of the rib plates and nodal zones should have been reinforced with. When indeterminacy got retrieved, certain values of length of these reinforcing plates, depending on fixed numbers of summand in final equation, were obtained. Then choosing one of the two parameters, which describe reinforcing near-to-connection areas of the members, can be determined either length of the reinforcing plate with fixed cross section area or cross section area with fixed length of reinforcing plate.
Keywords.variational methods, edge effects, warping of thin-walled cross-sections, the hypothesis of flat sections, sprengel, heuristically.
For citations:Girfanov I.S., Jumanov V.A. Determining the length of the stiffeners, that amplifies nodal zone of farms and structures made of thin-walled profiles // Izvestiya KGASU. 2015. №3(33) P.51-55.


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