Numerical Simulation of Seismic Performance of Ultra High Performance Concrete Columns

Abstract

In order to study the seismic performance of ultra-high-performance concrete (UHPC) columns, ABAQUS finite element software was used to simulate the seismic performance tests of UHPC columns under horizontal loads. The simulation results were compared with existing experimental results, showing good agreement. Based on this, the hysteresis curves and skeleton curves of UHPC columns under different parameters were studied using the variable control method to investigate the effects of axial compression ratio, stirrup spacing, and longitudinal reinforcement ratio on the seismic performance of UHPC columns. The results show that with the increase of the axial compression ratio, the bearing capacity of UHPC columns is significantly improved. However, the area of the hysteresis curve decreases with increasing axial compression ratio, ductility is reduced, failure mode tends to become brittle, and seismic performance decreases as the axial compression ratio increases. Changes in stirrup spacing and longitudinal reinforcement ratio can both improve the seismic performance of UHPC columns.