About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Ilshat T. Mirsayapov, doctor of technical sciences, associate professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0003-4902-6167 Evgeny V. Khorkov, senior lecturer, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0001-9040-6538 Rustam I. Minzianov, assistant, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0002-7198-9907 |
| Title of the article | Study of the bond of periodic profile reinforcement to concrete in the conditions of an operating facility |
| Abstract. | Modern, reliable and efficient civil buildings are constructed mainly from monolithic reinforced concrete directly at the construction site. The nature of the work of monolithic reinforced concrete structural systems is, as a rule, repeatedly statically unchangeable systems. The calculation of statically unchangeable systems largely depends on the loads applied to the system, determined at the design stage. But over time, the loads on the floor, physical and mechanical properties of concrete and reinforcement, as well as the characteristics of their bond can change. The purpose of this work is to determine the bond of periodic profile reinforcement to concrete at a real facility with changing operational loads. The following tasks are solved in the course of the work: conducting an experiment on an existing structure, analyzing the stress-strain state of reinforcement and concrete under a changing load, identifying the most dangerous limiting factors (destruction and deformation) affecting such structures. The object of the study was a monolithic reinforced concrete beamless floor slab in an operated building, the frame of which was 8 years old at the time of the experiment. Results. Experimental control systems (sensors and deflection meters) confirmed the alignment between the experimental data and the theoretical behavior of reinforced concrete structures. Features of the redistribution of forces in the span and support zones of the slab were identified, which is associated with the yield of the reinforcement in the span zone. The continuous application of short-term loads, which is especially prevalent in shopping and entertainment complexes, significantly affects the behavior of statically indeterminate reinforced concrete systems. In certain situations, such as specific combinations of short-term loads or their movement, a sudden release of surface energy may take place, resulting in the formation of new surfaces in the form of cracks. This also leads to increased deflections due to a decrease in stiffness in certain parts of the structure. Conclusions. An experimental loading of the existing floor slab was performed using a strip load. The results showed that short-term displacement loads present the highest risk to flat reinforced concrete floor slabs. Scientifically, it is crucial to examine the processes taking place in the “concrete-reinforcement” interaction zone. Practically, design engineers must pay increased attention to the design of reinforced concrete beamless floors. |
| Keywords. | reinforcement-concrete bond, reinforced concrete slab, cracking, physical experiment, reinforcement of a periodic profile, full-scale experiment, beamless slabs |
| For citations: | Mirsayapov Ilshat T., Khorkov E.V., Minzyanov R.I. Study of the bond of periodic profile reinforcement to concrete in the conditions of an operating facility // News of KSUAE, 2024, № 4(70), p. 95-104, DOI: 10.48612/NewsKSUAE/70.9, EDN: GWZWHI |
