足尺钢管混凝土柱梁节点抗剪性能试验

Full scale Experimental Research on Shear Capacity of Concrete filled steel tube Column Connections

摘要:

对10个不同节点构造的足尺钢管混凝土柱梁节点在不同轴压比下的抗剪性能进行了试验研究.在此基础上，对不同的节点域抗剪承载力计算公式进行了比较分析，并进一步讨论了节点域受剪性能的数值模拟（OpenSEES）方法.研究表明，所有的节点均表现出良好的抗剪性能；中国规范建议的节点域抗剪承载力公式有待改进；OpenSEES数值模型合理地模拟了节点域的剪力剪切变形性能.

Abstract:

Experimental research was conducted on 10 full scale concrete filled steel tube (CFT) column connections to investigate their seismic performance under various axial force ratios. Different shear strength equations were compared, and the shear strength deformation relations were further implemented into OpenSEES simulations. Results show that all tested CFT connections present excellent shear capacity in resisting lateral loadings; the equations proposed in Chinese specifications need improving; and OpenSEES model provides reasonable simulations on both shear strength and shear deformations of the joints.