X型厚壁圆管相贯节点平面外受弯抗震性能试验研究  

Research on seismic behavior of unstiffened thick-walled tubular X-joints under out-of-plane bending

作　　者：孟宪德[1] 王伟[1] 陈以一[2] 赵必大[1] 杨联萍[3] 曲宏[3] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]上海建筑设计研究院有限公司,上海200041

出　　处：《建筑结构学报》2009年第5期126-131,共6页Journal of Building Structures

基　　金：国家自然科学基金项目(50578117);高等学校博士学科点专项科研基金项目(20070247048);上海市科委科研计划项目(065912061)

摘　　要：采用相贯节点的圆钢管结构广泛应用于大跨度网格结构中,对于具有一定抗弯刚度的连接,节点将受到弯矩作用。介绍了两个不同几何参数的X型厚壁圆钢管相贯节点试件的平面外受弯滞回性能试验,结合数值分析,对节点承载能力和变形能力进行了研究。结果表明:在合理的几何参数和焊缝质量保证下,厚壁圆钢管相贯节点平面外受弯的承载力较高;厚壁圆钢管相贯节点在支主管径比β较大时节点易发生主管壁拉剪断裂破坏;在支主管径比β较大时延性等抗震性能较好,β较小时延性等抗震性能较差。To large span roof structures, lattice grid and reticulated shell are widely used as the common structural systems. Unstiffened tubular joint in these structures is subjected to both axial force and bending moment in and out-of- plane of member, if the connection possesses bending rigidity. An experiment on two unstiffened thick-walled tubular X-joints with different geometrical parameters under cyclic quasi-static out-of-plane bending was performed. Based on the result of experiment and numerical analysis, the seismic behavior of the joint was researched. By proper design of geometrical parameters and quality assured welds, out-of-plane bending capacity of joints can be developed. Unstiffened thick-walled tubular X-joints with the larger ratio β of branch diameter to chord diameter prone to tearing failure （ tensile and shearing rupture） of the chord wall, and the joint behaves excellently in deformability and energy- dissipation capability.

关 键 词：厚壁圆钢管 X型相贯节点 拟静力试验 平面外受弯 抗震性能 

分 类 号：TU392.3[建筑科学—结构工程] TU317.1