对高层钢结构经常采用的一种支撑连接节点进行研究。通过力学机制解析,指出此种节点存在承载能力不足的缺陷。采用数值分析方法,建立27个参数模型,根据分析结果,给出节点极限承载力与截面宽高比、翼缘宽厚比、腹板高厚比等各参数的关系,验证此节点承载能力不足的缺陷。最后给出此种支撑连接节点的改进措施。 A kind of supporting connection node often used in high-rise steel structures is studied. Through mechanics analysis, it is pointed out that this kind of node has the disadvantage of insufficient bearing capacity. According to the analysis results, the relationship between the ultimate bearing capacity of the joint and the aspect ratio of the section, the aspect ratio of the flange and the ratio of web thickness to thickness is established, and the bearing capacity of the node is not enough defect. Finally, this kind of support measures to improve the connection node.