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目的研究钢骨-钢管混凝土柱的抗震性能,探索其影响因素.方法以轴压比、含骨率为主要参数,通过5根钢骨-钢管混凝土柱的拟静力法试验研究,对此类构件的抗震性能进行评价.试验过程中,在柱顶施加恒定的竖向荷载,水平推拉往复荷载由固定在反力墙上的水平千斤顶施加.根据试验过程中采集到的荷载和位移等数据,通过整理作出试件的滞回曲线和骨架曲线.结果试验结果的分析表明,随含骨率的增大,钢骨-钢管混凝土柱的强度和刚度衰减减缓,耗能能力增加;随轴压比的增大,试件极限承载力下降,耗能能力降低.结论含骨率和轴压比是影响钢骨-钢管混凝土柱抗震性能的敏感性因素.
Aim To study the seismic behavior of steel-concrete-filled steel tube columns and to explore its influencing factors.Methods Based on the quasi-static tests of 5 steel-concrete-filled steel tubular columns with axial compression ratio and bone content as the main parameters, During the test, a constant vertical load is applied to the top of the column and the horizontal push-pull reciprocating load is applied by a horizontal jack fixed on the reaction force wall. According to the data of load and displacement collected during the test, The hysteresis curves and the skeleton curves of the specimens were obtained through the collation.Results The analysis of the test results showed that the strength and stiffness of steel-concrete-filled steel tubular columns decreased with the increase of the bone content, and the energy dissipation capacity increased. With the increase of the axial compression ratio , The ultimate bearing capacity of the specimens decreased and the energy dissipation capacity decreased.Conclusion The skeletal ratio and axial compression ratio are the sensitive factors that affect the seismic performance of SRC columns.