配置HRB500钢筋T形截面混凝土柱抗震性能研究

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

对4根配置HRB500钢筋T形截面混凝土异形柱进行了低周反复试验,分析了HRB500钢筋和与之匹配的高强混凝土T形截面异形柱的破坏形态,承载能力及延性,刚度退化,滞回特性,耗能能力等抗震性能指标,讨论了配箍特征值和轴压比对T形截面柱的抗震性能的影响.研究表明:配置HRB500钢筋T形截面混凝土异形柱钢筋与高强混凝土协同工作较好,具有较高的承载能力,其延性性能和耗能能力等抗震性能指标良好,能够在强震区的异形柱结构中使用.

Based on the tests of four HRBS00 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 dis- cussed in the investigation. Experimental results indicate that, under certain width-thickness ratio and appro priate 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 HRBS00 RC T-shaped section columns have excellent seismic performance, which can be used in the structure with specially shaped columns in meizoseismal regions.