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 Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering Organization address: 420043, Russia, Kazan, Zelenaya str., 1
Title of the articleExperimental studies of the endurance of reinforced concrete beams
Abstract.Problem statement. The purpose of the study is to identify the regularities of the development of deformations of concrete in the compressed zone during cyclic loading of stationary and non-stationary modes. Since reinforced concrete structures of buildings and structures are exposed to cyclic loads of various modes and types of impact during operation, a fairly large number of methods for calculating the fatigue strength of reinforced concrete structures have been developed. However, these methods do not have sufficient experimental justification. Results. The main results of the study consist in experimental studies of the endurance of the normal sections of reinforced concrete beams of rectangular cross-section under stationary and non-stationary modes of cyclic loading. The nature of the development of damage and destruction of beams of the compressed zone concrete is established. Conclusions. The significance of the obtained results for the construction industry consists in establishing the regularity of the development of deformations of concrete in the compressed zone during cyclic loading of stationary and non-stationary modes. For the accepted parameters of loading of reinforced concrete beams, the destruction occurred along the concrete in a compressed zone due to the formation and development of fatigue cracks in the concrete. In the concrete of the compressed zone, under the cyclic loads, deformations developed, which increased regardless of the cyclic loading mode. The main part of the deformations occurred at the beginning of loading up to about 5?104-105 loading cycles.
Keywords.reinforced concrete beam, normal cross-section, compressed zone concrete, cyclic loading, concrete deformations, nature of destruction
For citations:Mirsayapov Ilizar T. Experimental studies of the endurance of reinforced concrete beams. Izvestiya KGASU. 2021. No. 3 (57). P. 12–22. DOI: 10.52409/20731523_2021_2_12

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