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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.Igor Y. Maistrenko – candidate 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 Tagir Almirovic Zinnurov – candidate of technical sciences, senior researcher, 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 Tatiana Igorevna Maistrenko - industrial Safety Engineer, Scientific and production center "Stroy-Expertisа" ltd. Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Dmitry Igorevich Erokhin – project designer, Scientific and production center "Stroy-Expertisа" ltd. Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Vitaly Sergeyevich Malygin – project designer, Scientific and production center "Stroy-Expertisа" ltd. Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Title of the articleStudies of coercive force of steel structures of bridge structures
Abstract.The modern method of non-destructive testing based on the measurement of coercive force demonstrates the possibility of analyzing the stress-strain state for any steel structures, especially for the most critical bridge structures. The purpose of the study is to evaluate the statistical variability of the coercive force and the reliability of the transition between stresses and coercive force in the steel structures of bridge structures. The main results of the study are to obtain the statistical characteristics of the coercive force for steel grade St3sp5 with a thickness of 8 mm in the state of delivery, after machining the samples and in the process of loading the samples. The results obtained by the method of confidence intervals based on the hypothesis of the normal distribution of the random value of the coercive force are in good agreement with the results of similar studies of steel St3, namely, with the critical value of the coercive force of 6...7 A/cm (600...700 A/m). The studies and methodological techniques proposed by the authors demonstrated the process of improving the system for evaluating the characteristic critical values of the coercive force with a certain level of reliability according to a series of mechanical tests of proportional control samples. The method of analysis of the coercive force will make it possible to quickly evaluate the transition of steel from elastic to elastic-plastic and plastic deformation zones. The significance for the construction industry lies in ensuring the timely identification of those structural elements of bridge structures, the condition of which does not fully meet the requirements for safe operation. The study of the dynamics of the variability of the coercive force during the entire life cycle of the bridge structures will allow using the information obtained for optimal planning of repair activities.
Keywords.coercive force, mechanical tests, statistical analysis, probability distribution function, reliability
For citations:I. Y. Maistrenko, T. A. Zinnurov, T. I. Maistrenko, D. I. Erokhin, V. S. Malygin Results of a laboratory study of flat samples made of rolled steel St3sp5 with registration of coercive force values// News KSUAE,2022 №2(60), Р.24-36 DOI:10.52409/20731523_2022_2_24 EDN: BLOVRM


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