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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.Kuznetsov I.L. – doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Gimranov L.R. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Salakhutdinov M.A. – candidate of technical sciences, senior lecturer E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Fakhrutdinov A.E. – 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 articleJoints perfection of steel trusses with chords of hollow polygonal cross section
Abstract.Problem statement. The purpose of this research work was the development of reinforcement solutions of roof trusses chords consisting of zinc-coated pipes of polygonal hollow section with constant thickness ranged from 4-6 mm. Cross sections is formed from blank plate of constant width in such a way that it has gusset along of the length of a chord. Results. Its determined that forces which act on a gusset with thickness from 4 to 6 mm are larger than allowed by statical calculations. Therefore 4 different reinforcement solutions are developed for achieving robust force transferring from brace members of the truss to chords. All reinforcement options exclude welding, which damages the galvanized coating. Finite element models of a part of the top chord of the truss in reinforced state were created and analyzed for all four types of reinforcement solutions. Conclusions. The significance for the construction industry lies in the fact that the coefficients of the efficiency of amplification are obtained. The reinforcement by bending the slots is rational for all the thicknesses considered; reinforcement by installing the intermediate plate is less effective than bending; the preload of bolts in the case of bending is most effective at a thickness of 6 mm, with a thickness of 4 mm is not effective.
Keywords.polygonal cross section, cold forming profile, chord of truss, longitudinal plate, bolted connection, finite element model.
For citations:Kuznetsov I.L., Gimranov L.R., Salakhutdinov M.A., Fakhrutdinov A.E. Joints perfection of steel trusses with chords of hollow polygonal cross section // Izvestiya KGASU. 2017. №3(41) P.116-123.


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