Numerical Simulation Analysis of Uniaxial Compression Damage of Reinforced Concrete Columns Based on ABAQUS

Abstract

Reinforced concrete columns are widely used in construction projects and are mainly damaged by compression. In order to study the characteristics of the damage of reinforced concrete columns under uniaxial compression state, the uniaxial compression damage model of reinforced concrete columns is established by introducing the element deletion algorithm, concrete damage plasticity model (CDP) based on ABAQUS software. The results show that: (1) Under the load, the damage starts at the end of the specimen and expands to the middle, finally forming a through diagonal crack. The diagonal cracks are at 45° to the bottom surface. (2) At the beginning of load loading, the reinforcement has not yet reached the yield strength, and the restraining effect of the hoop on the concrete is not yet obvious. (3) With the increase of load, the hoop reinforcement and longitudinal reinforcement successively yielded. Local damage occurs in the concrete protective layer until the specimen fractures.