【摘要】 为研究钢管高强混凝土组合柱的抗震性能,完成了10个试件的拟静力试验。试验主要变化参数为轴压比和配箍特征值,探讨了组合柱在反复水平荷载作用下的破坏形态、滞回特性、位移延性、耗能比、截面应变分布和承载力等受力性能。试验结果表明:10个试件的破坏形态为柱根部混凝土压溃而丧失竖向承载力,力-位移滞回曲线饱满,位移延性系数在4.0以上,极限位移角大于1/40,以耗能比表示的耗能能力接近。用平截面假定和叠加法计算得到的试件在轴压力作用下的正截面承载力与试验结果符合较好,《钢管混凝土叠合柱结构技术规程》(CECS 188:2005)方法计算的正截面承载力偏小较多。更多还原

【Abstract】 To study the seismic behavior of high-strength concrete-filled steel tube composite columns,quasi-static tests on 10 specimens were conducted.The experimental parameters included the axial force ratio and the stirrup characteristic value.The failure modes,hysteretic characteristics,ductility,energy dissipation ability,seciton strain distribution and load-carrying capacity were studied.The experimental results indicate that the failure mode of the specimens is the crushing of bottom concrete and loss of vertical load-bearing capacity.The horizontal force-displacement hysteresis loops are plump-shape with the displacement ductility ratio of specimen exceeding 4.0,and the ultimate drift ratio exceeding 1/40.The energy dissipation capacity in terms of energy dissipative ratios are about the same among the specimens.The bending strength of the specimens calculated by plane section assumption and by superposition method have good agreement with the test result under axial comperssive force,while the strength obtained by ’Technical specification for steel tube-reinforced concrete column structure’(CECS 188:2005) is much less than the test result.更多还原