(上海交通大学土木工程系，上海 200030)

［摘要］将回归得到的X形相贯节点轴向刚度、平面外弯曲刚度及平面内弯曲刚度的计算公式引入管结构分析设计软件STCAD，对某体育馆单层网壳屋盖结构进行了静力和整体稳定性分析。结果表明，X形相贯节点的刚度随着结构内力的增加而降低，节点的非刚性性能对单层网壳的变形及整体稳定性有显著影响。

［关键词］相贯节点；节点刚度；单层网壳；整体稳定性

Influence of joint stiffness on stability behavior of a single-layer reticulated shell

Qiu Guozhi, Zhao Jincheng(Department of Civil Engineering, Shanghai Jiaotong University，Shanghai 200030，China)

Abstract:Importing the computational formulas of tubular X-joint stiffness,including axial stiffness,out-of-plane bending stiffness and in-plane bending stiffness,into the design software STCAD for tubular structures,the static analysis and global stability analysis were carried out aiming at a single-layer reticulated shell of a gymnasium with tubular X-joints. The analysis results show that the stiffness of tubular X-joints decreases with the increasing structural loads. The non-rigidity characteristics of tubular X-joints have great effects on deformation and global stability behavior of tubular structures,and should be taken into account in design.

Keywords:tubular joint; joint stiffness; single-layer reticulated shell; global stability

作者简介：邱国志，博士，一级注册结构工程师，Email:qiugz@sjtu.edu.cn。

参考文献

［1］邱国志.圆钢管相贯节点刚度及其对结构整体性能的影响［D］.上海：上海交通大学，2008.

［2］上海交通大学土木工程系. 上海交通大学体育馆屋盖钢结构整体性能分析报告［R］. 2006.

［3］美国ANSYS公司. ANSYS 用户使用手册［M］.北京:美国ANSYS公司北京办事处,1998.

［4］QIU GUOZHI，ZHAO JINCHENG. Parameter analysis and axial stiffness formulae of tubular X-joints when braces are pressed［J］. Journal of Shanghai Jiaotong University (Science), 2009，14(4)：410-417.

［5］QIU GUOZHI，ZHAO JINCHENG. Experimental research and parameter analysis on rigidity of unstiffened tubular X-joints［C］//Shanghai：Proceedings of the 12th International Symposium on Tubular Structures (ISTS12)，2008:589-596.

［6］邱国志，赵金城. X型圆钢管相贯节点刚度试验研究［J］.上海交通大学学报，2008，42(6)：966-970.

［7］JGJ61—2003网壳结构技术规程［S］. 北京：中国建筑工业出版社，2003.