АНАЛІЗ ВПЛИВУ НЕРІВНОМІРНИХ ПОШКОДЖЕНЬ ЗАЛІЗОБЕТОННОЇ БАЛКИ З ВИКОРИСТАННЯМ ПРОГРАМНОГО КОМПЛЕКСУ FEMAP

Анотація

In most buildings and structures, reinforced concrete elements, which are operated with various damages and defects, are used. This article presents the results of theoretical studies of unevenly damaged reinforced concrete beams using the FEMAP software package. The occurrence of defects and damages leads to the danger of operation of buildings and structures, changes in the stress-strain state, and can lead to a decrease in the stiffness and bearing capacity of the structure. Defects and damages occur under the influence of the external environment, mechanical impacts, aggressive environment, and because of an explosion. The study aimed at analyzing the effects of the occurrence of uneven damage to reinforced concrete beams is of great practical importance in the future calculation of the residual bearing capacity and determination of the stress-strain state of a reinforced concrete element. Therefore, for theoretical studies, we use the finite element modeling of reinforced concrete elements in the FEMAP software package. The simulations were performed with different types of damage caused by wetting, alternating freezing, and thawing, and the stresses in concrete and reinforcement were analyzed using the finite element method (FEM), which is an effective numerical method for solving engineering problems. Based on the modeling results, the stresses were compared with the ultimate stresses, and the deformability of unevenly damaged reinforced concrete beams was determined. The results of the theoretical studies can be used in the future for practical experiments and are of practical importance in choosing the optimal method for calculating the residual bearing capacity of a reinforced concrete element. The importance of this study lies in its potential ability to improve the safety of building structures and reduce the risk of hazards during the operation of structures. The effectiveness of the FEM method, combined with these results, opens up new opportunities for engineers and researchers and can serve as a basis for improving the methods of calculating reinforced concrete elements under load using the latest finite element modeling technologies.