Calculation of the Bearing Capacity of Corrosion-Damaged Compressed Reinforced Concrete Elements under Seismic Action

Abstract

The relevance of the study is due to the need to assess the seismic resistance of buildings with defects caused by reinforcement corrosion to prevent their destruction under seismic impacts. The most common defect in reinforced concrete structures is corrosion damage of the working reinforcement, which not only reduces the bearing capacity but also changes the dynamic characteristics of structures. The aim of the work is to develop a method for calculating the bearing capacity of corrosion-damaged compressed reinforced concrete elements under alternating low-cycle loading. Materials and methods include an analytical review, experimental studies of column samples with varying degrees of reinforcement corrosion, and numerical simulation in the LSDYNA software package. The results include a developed method for calculating the hysteresis envelope, experimental data on the reduction of strength, stiffness, and dissipative properties of columns, as well as verification of the proposed method. The conclusions confirm that reinforcement corrosion leads to a significant decrease in the dynamic and strength characteristics of elements, and the proposed method makes it possible to assess their bearing capacity under seismic actions with sufficient accuracy.