针对武汉体育中心体育馆索支穹顶结构大型焊接空心球支座节点设计的需要,对其进行了非线性有限元分析和足尺试验研究。该节点与12根杆件、2个方向拉索相连,且其中有3根杆件相贯连接。通过有限元分析,得到了该节点的应力分布规律,且在1.4倍设计荷载下,杆件相贯处和其底端部分区域屈服。进一步的足尺试验结果表明,在1.4倍设计荷载作用下,最大杆件根部屈服,与有限元结果基本一致。进而,对这类节点的设计提出了建议。 Aiming at the design of the large welded hollow ball bearing node of the Suqian dome in Wuhan Sports Center Gymnasium, the nonlinear finite element analysis and the full-scale test are carried out. The node is connected with 12 rods and two directions cables, and three of the rods are connected through each other. Through the finite element analysis, the stress distribution law of the node was obtained, and under the 1.4 times of design load, the rod members yield at the intersection and at the bottom part. Further full-scale test results show that under the 1.4 times of design load, the maximum yielding of the rod root is basically consistent with the finite element results. Furthermore, some suggestions on the design of such nodes are proposed.