600MPa级钢筋混凝土十字形柱抗震性能试验研究与恢复力特性分析

针对7个配置600 MPa级钢筋的十字形柱进行低周往复荷载试验,得到试件的滞回曲线、骨架曲线和纵筋、箍筋应变曲线。研究结果表明:各试件的滞回曲线饱满,对称性较好,具有良好的耗能能力;配箍率增大,试件的峰值荷载增大,变形能力增强;轴压比增大,试件的承载力增大,耗能能力提高,刚度退化加快;与配置HRB500钢筋的试件相比,配置600 MPa级钢筋的试件峰值荷载较大,塑性变形能力增强,但其耗能能力降低。基于ABAQUS软件对试件进行有限元分析,模拟结果与试验结果符合较好。

Experimental analysis on seismic behavior and analysis of restoring force characteristics of 600 MPa RC cross-shaped columns

A low cyclic reversed loading test was carried out on seven cross-shaped columns with 600 MPa reinforcement.The hysteric curve,skeleton curve,longitudinal reinforcement strain curve and stirrup strain curve of the specimen under low cyclic reversed loading were obtained.The results show that the hysteric curve is full,the symmetry is good and the energy dissipation capacity is good.With the increaseof the stirrup ratio,the peak load and the deformation capacity are enhanced.With the increase of the axial compression ratio,the ultimate bearing capacity increases,and the energy dissipation capacity raises while the stiffness degradation accelerate.The load capacity of the 600 MPa reinforced specimen is larger than that of the HRB500 reinforced specimen,and the plastic deformation capacity enhances while the energy dissipation capacity reduces.By using the ABAQUS software,the finite element analysis of the specimen was carried out.The simulation results were in good agreement with the experimental results.