K形圆钢管搭接节点受力特点及极限承载力分析研究  

RESEARCH ON FORCED PERFORMANCE AND ULTIMATE CAPACITY OF OVERLAPPED TUBULAR K-JOINT

作　　者：吴捷[1] 蒋剑峰[1] 戴雅萍[2] 赵宏康[2] 

机构地区：[1]东南大学土木工程学院,南京210096 [2]苏州市建筑设计研究院有限责任公司,江苏苏州215002

出　　处：《工业建筑》2009年第1期122-127,共6页Industrial Construction

摘　　要：K形圆钢管搭接节点在大跨空间结构中倍受青睐,但对于此类节点的受力特点和极限承载力及其影响因素至今还存在着诸多疑点和盲区。利用非线性有限元分析方法,对K形圆钢管搭接节点在不同搭接率条件下的受力性能进行研究,分析支主管直径比、主管径厚比、支主管壁厚比以及搭接关系、内隐藏焊缝焊接状况等因素对节点极限承载力的影响,并由模型数据回归出一套平面K形圆管搭接节点的有限元承载力公式。Overlapped tubular K-joints are widely used in long-span space structures. However, there are still doubts and blind zones in forced features, ultimate bearing capacity and influencing factors of these sorts of joints. Nonlinear FEM is used to study the forced performance of the joints under different lap rates, and also analyzed that the effects of branch-main diameter ratio, diameter-thickness ratio of the main, branch-main wall thickness ratio and hidden weld conditions etc on the ultimate capacity of these joints. Finally, a set of formulae to calculate the bearing capacity of the overlapped tubular Kjoints are obtained by nonlinear regressive technique.

关 键 词：K型圆钢管搭接节点 非线性有限元 极限承载力 内隐藏焊缝 搭接关系 

分 类 号：TU392.3[建筑科学—结构工程]