汤  征     （宝钢设计研究院  上海 200941）

[提要]  依据几个大跨度单层门式刚架轻型房屋的设计体会，对支撑体系的设计，着重对支撑体系的刚度、承载力、连接进行了分析和研究。同时就支撑体系的设计要点提出了建议。
[关键词]  圆钢十字支撑  刚度  变形

Through the design of huge span rigid frames recently, the bracing system and detail are discussed, especially about calculation of the bracing connection and local deformation. Types of failure included tearing of welds and web are described. The behavior and stiffness of the bracing are analyzed. Based on the experience of several projects, the key points of the design suggestions on bracing system are proposed.
Keywords:  steel structure; rigid frame; diagonal rod brace; stiffness; deformation