Volume 18, No. 4, 2024
Received: 2023/11/26, Accepted: 2024/07/24
Authors:
Sergey Savin; Le Toan;
Abstract:
The resistance of structures to initial damage and failure has recently become more important. This is related to the increasing number of natural hazards or man-made accidents. On the other hand, the rate of construction is increasing. This requires the improvement of methods to assess their safety under accidental impacts. The objective of the study is to investigate the influence of the topology of the reinforced concrete frames and crack opening effects on the structural behavior under a column removal scenario. In order to achieve the given objective of the study, a variant of discretization of the finite element model has been proposed, which takes into account additional rotations during the formation of discrete cracks. The condition of reaching the limit point of equilibrium on the force-displacement curve is considered as a criterion of the bearing capacity of structures. Verification of the proposed method has been performed by comparison with experimental data for a U-shaped frame. The paper provides a comparative analysis of the calculation results using structural elements and the proposed method.
Keywords:
reinforced concrete, frame, failure, crack, modelling, finite element method, moment, angle of rotation