New issues - Известия Казанского государственного архитектурно-строительного университета.

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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.Mirsayapov Ilizar Talgatovich doctor of technical sciences, 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 Garifullin Dinar Rafikovich engineer E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it NPPF Fundamentspetsremont The organization address: 420087, Russia, Kazan, Gvardeyskaya st, 56
Title of the articleEquations of the endurance of the reinforcement of a bending reinforced concrete element under regime repeated loading
Abstract.Problem statement. In reinforced concrete bending elements under the action of repeated cyclic loading, regardless of the loading regime, inelastic creep deformations appear and develop in the concrete of the compressed zone. For this reason, the concrete deformation conditions of the compressed zone and the longitudinal stretched reinforcement are non-stationary regardless of the loading mode. Results. Experimental and theoretical studies of the behavior of a reinforced concrete bending element under repeated cyclic loading and the established modes of deformation of the longitudinal reinforcement as part of the bending element are carried out. To assess the endurance of the reinforcement under such deformation regimes, studies have been conducted and equations of reinforcement endurance under different loading modes have been obtained using the methods of fracture mechanics of elastic-plastic materials. Based on the conducted research, an equation of rebar endurance was developed for practical calculations of reinforced concrete bending elements under regime repeated loads. Conclusions. The significance of the results obtained for the construction industry is that the proposed method allows the most accurate assessment of the stress-strain state of the reinforcement and the processes of changing the strength of steel from the standpoint of fracture mechanics, which is a significant contribution to the theory of fatigue strength and provides steel savings of up to 20 % compared to existing methods.
Keywords.reinforced concrete, reinforcement, endurance, regime loading, cyclic loading, bending element, fracture mechanics.
For citations:Mirsayapov Ilizar T., Garifullin D.R. Equations of the endurance of the reinforcement of a bending reinforced concrete element under regime repeated loading // Izvestiya KGASU. 2020. №1() P.93-.


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