梁贯通式钢管混凝土柱-梁边节点拟静力试验后轴压试验研究*
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（1 北京市建筑设计研究院有限公司广州分公司，广州 510623； 2 华南理工大学土木与交通学院，广州 510641； 3 亚热带建筑科学国家重点试验室， 广州 510641)
［摘要］对4个已完成拟静力试验的梁贯通式钢管混凝土柱-梁边节点试件进行了轴压试验，从破坏形态、荷载位移曲线、环筋应变等方面进行了研究，并将试验峰值荷载与规范公式计算值进行对比分析。结果表明，该节点的环梁在反复荷载下虽然产生了一定的损伤，但对节点区的峰值荷载影响不大，并表现出较好的延性。试件的柱插筋及环梁钢筋强度均能得到充分发挥，环梁对节点核心区仍能发挥约束和加强作用。合理的设计可使得节点的轴压承载力大于钢管混凝土柱的轴压承载力，保证破坏不发生在节点区，确保了节点区传递竖向荷载的可靠性。［关键词］钢管混凝土柱-梁边节点; 不贯通钢管; 轴压; 拟静力试验中图分类号：TU398 文献标识码：A 文章编号：1002-848X(2016)09-0063-06
Axial compression experiment study on exterior through-beam joints between concrete filled steel tubular column and RC beam after quasi-static testChen Yingrui1, Xue Hua2, Chen Qingjun2,3, Huang Peizhou2(1 Beijing Institute of Architectural Design Guangzhou Branch, Guangzhou 510623, China; 2 School of Civil and Transportation Engineering, South China University of Technology, Guangzhou 510641, China; 3 State Key Laboratory of Subtropical Building Science, Guangzhou 510641, China)Abstract: The axial compression experiments were carried out on four exterior through-beam joints between concrete filled steel tubular column and beam after the quasi-static test. The aspects of failure mode, load-axial displacement curves of the specimens, strain of ring reinforcement were studied, and the peak load in experiment was compared with the value calculated by conventional formulas. The results show that although the quasi-static test causes some damages on the ring beam, but they had few effects on the peak load, and specimens show good ductility. The strength of reinforcement in column and ring beam is fully developed，the ring beam can still confine and strengthen the joint zone. With reasonable design, the axial bearing capacity of the joint zone is higher than the concrete filled steel tubular column, damage does not occur in the joint, and the transfer of vertical load in joint is reliable.Keywords: concrete filled steel tubular column and RC beam exterior joint; discontinuous steel tube; axial compression; quasi-static test
*华南理工大学亚热带建筑科学国家重点实验室自主研究课题项目(2015ZC18)，华南理工大学中央高校基本科研业务费专项资金资助（2014ZZ0026）。通讯作者： 陈庆军，博士，副教授，Email: qjchen@scut.edu.cn。
