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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。
In order to study the seismic performance of high-strength concrete composite columns, the quasi-static tests of 10 specimens were completed. The main parameters of the test are the axial compression ratio and the characteristic value of the bail. The failure modes, hysteretic characteristics, displacement ductility, energy dissipation ratio, cross-sectional strain distribution and bearing capacity of the composite column under repeated horizontal loading are discussed. The test results show that the failure mode of 10 specimens is the loss of vertical bearing capacity caused by the collapse of concrete in the column root, the full force-displacement hysteresis curve, the displacement ductility coefficient above 4.0 and the limit displacement angle greater than 1/40, Than that of energy consumption close to. The normal section bearing capacity of the test piece calculated by the plane cross-section assumption and the superposition method is in good agreement with the test results under the axial pressure. The normal cross-section calculated by the method of Technical Specification for Concrete Filled Steel Tubular Pillars (CECS 188: 2005) Bearing capacity is too small.