(北京市建筑设计研究院 北京 100045)
【提要】 五棵松文化体育中心体育馆为2008北京奥运会篮球馆，钢结构屋架跨度为1223m，采用了非等高（63～93m）双向正交钢桁架体系。桁架结构支承在周边20根钢筋混凝土柱上。除与四角柱为双向固定铰接外，钢屋架与其它柱在平行于桁架方向采用了有弹簧限位的滑动支座，垂直于桁架方向为固定铰接。滑动支座有效地控制了屋架传给承重柱的推力，尤其在地震作用下。在考虑竖向荷载组合、多遇地震荷载组合和设防地震荷载组合的情况下，均能满足承载力极限状态和正常使用极限状态要求。
【关键词】 双向正交桁架 弹簧限位滑动支座 多遇地震 设防地震
Application of Sliding Supports with Spring Resistances in Largespan Steel Truss Roof of the gymnasium of Wukesong Culture and Sports Center/Yan Feng，Qi Wuhui，Gan Ming（Beijing Institute of Architectural Design, Beijing 100045,China）
Abstract:The Gymnasium of Wukesong Culture and Sports Center  is the main basketball stadium of 2008 Beijing Olympic Games. The roof structure of the gymnasium is steel truss which has span of 1223m. The truss is twoway orthogonal and the height is changed from 63m to 93m. The trusses are supported by 20 RC columns around the Gymnasium. The supports between the truss and corner columns are fixedhinged supports. Others are oneway sliding supports with spring resistances, and the truss is fixed out the plane of truss but sliding in the plane of the truss. Horizontal forces transferred to the columns can be controlled because of the supports. The truss and columns can meet the requests of ultimate limit state and serviceability limit state under vertical load combination, frequent seismic load combination and design seismic load combination.
Keywords:gymnasium; orthogonal truss; sliding support with spring resistances; frequent seismic; design seismic load