CALCULATION OF LOAD-BEARING CAPACITY OF RC BEAM IN THE PRESENCE OF COMPRESSIVE ZONE DAMAGE

Abstract

Research on the calculation of the load-bearing capacity of reinforced concrete beams, taking into account damage to the compressed zone of concrete, along with the consideration of operational influences and external factors, is essential for understanding the behavior of structures. Recent studies indicate significant progress in understanding and approaches to this process, with significant attention being given to the analysis of damage in the compressed zone of concrete. Early restoration of damage allows for reliable operation without the risk of failure. In this article, a theoretical calculation of the stress-strain state of a reinforced concrete beam was performed using the second equilibrium form, and graphs illustrating the relationship between concrete and reinforcement deformation and moment were constructed. The calculation was conducted for two scenarios: an intact reinforced concrete beam with a height of 200 mm and a damaged reinforced concrete beam with a height of 150 mm. The results showed a 35% reduction in load-bearing capacity compared to the operational values according to the first limit state group. Additionally, the occurrence of the allowable deflection limit under the second limit state group was predicted to happen rapidly.