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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.Serazutdinov Murat Nurievich doctor of physical and mathematical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Ubaidulloyev Madzhid Nasrievich 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 National Research Technological University The organization address: 420015, Russia, Kazan, K. Marks st., 68
Title of the articleMethod of calculating the elastoplastic deformation of strengthened rod structures under different loading regimes
Abstract.Problem statement. The purpose of the research is to develop a universal variational method for calculating the strengthened rod structures in cases when the deformations are elasto-plastic, external forces change in the loading-unloading-repeated loading mode, and changes in the structural design of the structure can be made when the force values are changed. Results. The main calculated ratios for the three stages of changing the external load are presented. At the first stage, the elastoplastic deformations in the elements of the rod structure are determined, at the second stage, the stress-strain state of the structure after unloading is located, at the third stage the structure is calculated after repeated loading. With the use of these types of changes in the external load, all possible regimes of changing external forces can be used. Relations are presented for the calculation of the elements of rod structures, amplified in a stressed state, taking into consideration the history of their loading and unloading. The results of calculation of the steel beam strengthened in the stress-strain state by the proposed method are presented. Conclusions. The significance of the results obtained for the construction industry are that it is possible to carry out calculations using a single scheme for rod structures from hardening and ideally elastoplastic material, taking into consideration the load history and changes introduced into the calculations scheme when the structure is strengthened. The results of calculations showed that when strengthening structures by the method of their preliminary unloading, the amplification efficiency is obtained substantially more than in the case when the amplification is performed without unloading.
Keywords.rod structures, reinforced material, strengthening, unloading, permanent deformation, repeated loading, variation method.
For citations:Serazutdinov M.N., Ubaidulloyev M.N. Method of calculating the elastoplastic deformation of strengthened rod structures under different loading regimes // Izvestiya KGASU. 2018. №4(46) P.370--1.


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