矩形钢管焊接空心球节点承载能力的简化理论解与实用计算方法研究  

Simplified theoretical solution and practical calculation method for welded hollow spherical joints of rectangular hollow section members

作　　者：董石麟[1] 邢丽[1] 赵阳[1] 顾磊 傅学怡 

机构地区：[1]浙江大学空间结构研究中心,浙江杭州310027 [2]中建国家游泳中心设计联合体,北京100029

出　　处：《土木工程学报》2006年第6期12-18,共7页China Civil Engineering Journal

基　　金：国家科技攻关计划课题(2004BA904B02);北京市科技计划项目(Z0004028040221)

摘　　要：国家游泳中心“水立方”的新型多面体空间刚架结构采用配合矩形钢管、且承受轴力与弯矩共同作用的焊接空心球节点,目前规范对该类节点的设计方法尚属空白。在有限元分析和试验研究的基础上,进一步研究轴力、弯矩及两者共同作用下矩形钢管焊接空心球节点的承载能力及设计方法。首先推导基于冲切面剪应力破坏模型的节点承载力简化理论解,从而得到节点承载力计算公式的基本形式。在此基础上,利用有限元分析和试验结果,建立了轴力、单向弯矩以及两者共同作用下节点承载力的实用计算公式。对双向任意弯矩作用的情况,提出了基于线性插值的简化计算方法。成果可供实际工程设计采用,也可供相关规程修订时参考。and bending moments, are employed in the polyhedron spatial frame for the National Swimming Center, the ＂Water Cube＂. No provision is provided in current design codes for such joints. On the basis of finite element analysis and experimental study, the load-bearing capacity of and the design method for these joints, subjected to axial forces, bending moments, or combinations of the two, are investigated. Based on the punch-shear failure model, a simplified theoretical solution is derived for the loading-bearing capacity of the joints, and basic form of the design equation is obtained. By utilizing the results from finite element analysis and experimental study, a practical calculation method is established for the load-bearing capacity of the joints. For joints subject to biaxial bending moments, a simplified method is proposed based on linear interpolation.

关 键 词：焊接空心球节点 矩形钢管 承载能力 简化理论解 实用计算方法 

分 类 号：TU392[建筑科学—结构工程]