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(北京市建筑設(shè)計(jì)研究院 北京 100045)
【提要】 五棵松文化體育中心體育館為2008北京奧運(yùn)會(huì)籃球館，鋼結(jié)構(gòu)屋架跨度為1223m，采用了非等高（63～93m）雙向正交鋼桁架體系。桁架結(jié)構(gòu)支承在周邊20根鋼筋混凝土柱上。除與四角柱為雙向固定鉸接外，鋼屋架與其它柱在平行于桁架方向采用了有彈簧限位的滑動(dòng)支座，垂直于桁架方向?yàn)楣潭ㄣq接?；瑒?dòng)支座有效地控制了屋架傳給承重柱的推力，尤其在地震作用下。在考慮豎向荷載組合、多遇地震荷載組合和設(shè)防地震荷載組合的情況下，均能滿足承載力極限狀態(tài)和正常使用極限狀態(tài)要求。
【關(guān)鍵詞】 雙向正交桁架 彈簧限位滑動(dòng)支座 多遇地震 設(shè)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