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对轴压比分别为1.1及1.25的共4根约束混凝土柱的滞回曲线、耗能能力及刚度退化进行对比分析。分析表明:同一轴压比下,区域约束混凝土柱的各项抗震性能指标均优于传统箍筋柱。对于区域约束混凝土柱,在轴压比提高的同时,如果相应提高约束系数K,构件的各项抗震性能指标可以得到相应改善。所以对于区域约束混凝土柱用约束系数K作为衡量其抗震性能的一个参考指标,有一定合理性。
Hysteresis curves, energy dissipation capacity and stiffness degradation of a total of four confined concrete columns with axial compression ratios of 1.1 and 1.25 respectively were compared. The analysis shows that under the same axial compression ratio, the seismic performance indexes of the confined concrete columns are better than the traditional stirrup columns. For the area-constrained concrete column, while the axial compression ratio is increased, if the restraint coefficient K is correspondingly increased, the seismic performance indexes of the components can be improved accordingly. Therefore, it is reasonable for the restraint coefficient K of the confined concrete column to be used as a reference index to evaluate its seismic performance.