【摘要】 本文通过对水平反复荷载作用下4根钢管自应力混凝土柱和2根普通钢管混凝土柱的抗震性能试验研究,分析了两种钢管混凝土的荷载-挠度(P-Δ)滞回曲线和骨架曲线特点,从而进一步阐述了轴压比、自应力大小和混凝土强度等因素对钢管混凝土抗震性能的影响。试验结果表明,影响柱抗震性能的最主要因素是轴压比和自应力。随着轴压比的增加,钢管自应力混凝土位移延性系数下降;而自应力的存在不仅提高了反复荷载作用下钢管混凝土的极限水平承载力,同时也使其延性系数得到显著的增加。更多还原

【Abstract】 In this paper,a total of 4 self-stressing concrete filled steel tube columns and 2 conventional concrete filled steel tube columns were tested under cyclic load.Their shear-resistance properties,looping curves and skeleton curves were analyzed to explain the influence of some factors that include axial pressure ratio,self-stress and concrete strength on aseismatic behaviors.The test results show that the main influencing factors are axial pressure ratio and self-stress.The ductility factor decreases with the increase of axial pressure ratio.And not only the ultimate horizontal load,but also the ductility factor under cyclic load are increased due to the influence of self-stress.更多还原