Research on Seismic Behavior of HRB500 Reinforced Concrete T-shaped Section Columns

Based on the tests of four HRB500 RC T-shaped section columns under axial compression and low cyclic reversed lateral load,the failure mode,bearing capacity,ductility performance,rigidity degradation, hysteretic behavior,energy dissipation and cumulative damage of the specimens were studied systematically. The influence of reinforcement characteristic value and axial compression ratio on the seismic behavior was discussed in the investigation. Experimental results indicate that,under certain width-thickness ratio and appropriate axial compression ratio,the member's bearing capacity,ductility and energy dissipation are improved dramatically with the increasing of the reinforcement characteristic value. It has been revealed that the HRB500 RC T-shaped section columns have excellent seismic performance,which can be used in the structure with specially shaped columns in meizoseismal regions.