中文摘要：

通过14根组合柱试件在高轴向压力和低周反复水平荷载作用下的试验,研究了钢骨-方钢管高强混凝土柱的抗震性能。试验结果表明,该组合柱滞回曲线饱满,具有良好的耗能能力;轴压比、混凝土强度、宽厚比、含骨率等参数对组合柱的极限承载力和刚度具有显著影响,但是延性和耗能主要受轴压比和含骨率影响,其中轴压比是最主要的因素;钢骨的加入使方钢管高强混凝土柱的位移延性系数有了显著提高,但是当内填混凝土强度很高时,为了满足抗震设计的要求,保证组合柱具有良好的延性,仍有必要对其轴压比的限值作出规定。研究成果可为钢骨-方钢管高强混凝土柱在高烈度地震区的应用提供参考。

英文摘要：

The seismic behavior of square steel tubes filled with steel-reinforced high-strength concrete was investigated through 14 specimens subjected to combined high axial load and cyclic lateral force.Test results show that the hysteresis curves of the columns are plump,which indicates the columns have good energy dissipation capacity.Axial load ratio,width-to-thickness ratio,strength of concrete,and the content of steel section have significant effect on the strength and stiffness of the composite columns,but ductility and energy dissipation capacity are mainly affected by axial load ratio and the content of steel section,among which axial load ratio is the most important factor.The encased steel section can further improve the ductility of the square steel tubes filled with high-strength concrete,but when high-strength concrete is used,it is still necessary to limit the axial load ratio to satisfy the ductility demand for seismic design of the composite columns.The research results can provide beneficial reference for the composite columns designed as earthquake resisting structures.