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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.Radaykin Oleg Valerievich 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 Sharafutdinov Linar Alfredovich leading engineer E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it LLC «Kazan Engineering Project» The organization address: 420021, Russia, Kazan, Levo-Bulachnaya st., 52, of. 19
Title of the articleOn the evaluation of the joint effect of the initial stress-strain state and force cracks on the strength, stiffness and crack resistance of reinforced concrete beams, reinforced with a steel-fiber-concrete «jacket», based on computer simulation in PC «ANSYS»
Abstract.Problem statement. The purpose of the study is to evaluate the combined effect of the initial stress-strain state and force cracks in reinforced concrete beams, reinforced with steel-fiber-concrete (SFC) «jacket», on their rigidity, strength and crack resistance. Results. The main results of the study showed that the carrying capacity of reinforced beams (Pult), as well as the load corresponding to the moment of cracking in the SFC «jacket» (Pcrc, fb), practically do not depend on the initial load P0 up to the amplification destroying Pult* (not reinforced beams), then with an increase in this level, ceteris paribus, the carrying capacity of reinforced beams decreases by 10,7 %, and the load of the appearance of cracks, on the contrary, increases almost 1,5 times. It was also found that with an increase in the initial load P0, down to the level of 0,678Pult*, the stiffness of the reinforced beam gradually decreases by 3,76 times, and with a subsequent increase in P0, there is a sharp drop in stiffness by another 7,57 times. Conclusions. The significance of the results obtained for the construction industry consists in the opportunity to develop an engineering technique for reinforcing concrete beams using a fiber-reinforced shirt, which could take into account the effect of the initial stress-strain state and force cracks on the strength, rigidity and crack resistance of reinforced beams. Such a technique will allow one to obtain constructive amplification solutions with a lower consumption of materials in comparison with existing amplification methods.
Keywords.strengthening, steel fiber concrete, flexible element, computer simulation, numerical experiment, loading history.
For citations:Radaykin O.V., Sharafutdinov L.A. On the evaluation of the joint effect of the initial stress-strain state and force cracks on the strength, stiffness and crack resistance of reinforced concrete beams, reinforced with a steel-fiber-concrete «jacket», based on computer simulation in PC «ANSYS» // Izvestiya KGASU. 2019. №1() P.155-.


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