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。
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.
出处
《建筑结构》
CSCD
北大核心
2016年第9期63-68,共6页
Building Structure
基金
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)
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
concrete filled steel tubular column and RC beam exterior joint
discontinuous steel tube
axial compression
quasi-static test
