方钢管混凝土偏心受压构件曲率延性系数的研究

Study on curvature ductility coefficient of concrete-filled square steel tubular column compressed eccentrically

为反映方钢管混凝土截面延性的好坏,提出了方钢管混凝土偏心受压构件截面延性系数的计算方法,与试验结果进行了对比,结果表明该计算方法较为准确.并在此基础上,分析了轴压比和含钢率对方钢管混凝土截面延性的影响作用.结果表明:随着轴压比的增大,方钢管混凝土截面曲率延性系数降低;随着含钢率的增大,曲率延性系数提高.

In order to judge whether the sectional ductility of concrete-filled square steel tube is good or not, a calculation method of the curvature ductility coefficient of concrete-filled square steel tubular member compressed eccentrically is proposed. Compared with experimental results, the method proposed is found to have a high accuracy. Based on it, the effects of the load level and sectional steel ratio on the curvature ductility coefficient are analyzed. It can be concluded that the curvature ductility decreases with the increasing of the axial load level and improves with the increasing of the steel ratio.