李  云1，  张同亿1，  何晓洪2，  王利群1
(1 中国中元国际工程公司，北京100089；2 北京清华安地建筑设计顾问有限责任公司，北京100084)

[摘要] 北京国际花卉物流港罩棚是前端有较大仰角的马鞍形开敞式覆膜结构，由屋脊桁架、径向倒三角桁架、周边环梁和斜柱组成骨架，上表面采用PTFE张拉膜材。本文结合具体的结构设计，介绍了结构风荷载、雪荷载取值特点，给出结构静力、动力分析及屈曲分析结果，研究了支撑柱计算长度系数取值及节点受力情况，可供类似工程设计参考。
[关键词] 罩棚；风洞试验；静力、动力分析；屈曲分析；计算长度系数

    Structure Design of the Canopy in Trade Center of the International Flower Expo in Beijing
    Li Yun¹, Zhang Tongyi¹, He Xiaohong², Wang Liqun²
    (1China IPPR  Intemational  Engineering  Corporation, Beijing  100089, China; 2 Beijing Tsinghua-Andi Architects Consultants Ltd,Beijing 100084, China)

Abstract: The canopy in trade center of the international flower expo in Beijing is designed as saddle opening style with a big angle of elevation. The main supporting structure is made u Pof roof truss, triangle truss, beams and columns and PTFE material is used as membrane. The wind and snow load is introduced in detail. The static and dynamic analysis, and the buckling analysis of the structure are analyzed. The effective lengths of the columns and the node design are introduced. The experience can be referred by the similar engineering.
Keywords: canopy; wind tunnel test; static and dynamic analysis; buckling analysis; effective length