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为考察方钢管混凝土柱的累积耗能性能,进行了低周反复荷载作用下六根方钢管混凝土柱的力学性能实验研究,分析了轴压比、含钢率和长细比等参数对方钢管混凝土柱滞回曲线、承载力退化和累积塑性变形率的影响.结果表明:方钢管混凝土柱具有良好的累积耗能能力.随含钢率的增加,钢管混凝土柱的耗能能力提高;而随轴压比和长细比的增大,钢管混凝土柱耗能能力却相应降低.
In order to investigate the cumulative energy dissipation performance of concrete filled square steel tubular columns, the mechanical properties of six concrete filled square steel tubular columns under low cyclic loading were studied. The effects of axial compressive ratio, steel ratio and slenderness ratio on the concrete filled steel tubular columns Hysteresis curve, the bearing capacity degradation and the cumulative plastic deformation rate.The results show that the concrete filled square steel tube column has a good cumulative energy dissipation capacity.As the steel content increases, the energy dissipation capacity of the concrete filled steel tubular column increases; Compared with the slenderness ratio, the energy dissipation capacity of CFST columns decreases accordingly.