（1 天津大学建筑设计研究院， 天津 300073； 2 天津大学建筑工程学院， 天津 300072；3 天津市房屋建筑钢结构技术工程中心， 天津 300072）

［摘要］简述了沁阳体育馆工程的概况，结合主馆平面投影为椭圆形的弧形屋面造型及下部主体结构布置，通过三种结构方案的分析对比，提出屋盖采用椭圆抛物面弦支穹顶结构，并阐述了弦支穹顶结构的详细布置。采用有限元分析软件MIDAS/Gen800建立了主馆屋盖弦支穹顶结构分析模型，在各种荷载工况及组合下对结构进行了分析计算，得到结构的静动力响应。选取恒载+活载工况并考虑初始缺陷和几何非线性对结构进行了全过程分析，得到了结构稳定性能。计算结果表明各个指标均满足规范要求。最后对关键支座和拉索节点构造进行了设计。

［关键词］弦支穹顶； 体育馆； 稳定性能； 非线性； 节点构造

中图分类号：TU393.3,TU394    文献标识码：A    文章编号：1002-848X(2015)03-0077-06

Analysis and design of suspendome structure roof of  Qinyang Gymnasium

Yan Xiangyu1,3, Yu Jinghai1,3, Ma Shufei2, Yu Yong1, He Caiyun1, Chen Zhihua2,3

 (1 Architectural Design and Research Institute of Tianjin University, Tianjin 300073, China;2 School of Civil Engineering, Tianjin University, Tianjin 300072, China;3 Tianjin Steel Building Structure Engineering Center,Tianjin 300072, China)

Abstract:The overview of Qinyang Gymnasium was briefly introduced. Considering the arc shaped roof with elliptic plane projection of main gymnasium  and structural arrangement of lower main body, the elliptic parabolic suspendome structure for roof was put forward and adopted through  analysis and comparison of three schemes, and the detailed layouts were discussed. By finite element analysis software MIDAS/Gen800, the analytical model of the suspendome structure was established. Under various load cases and combinations, analyses of the suspendome structure were carried out and the static and dynamic responses of the structure were obtained. Taking initial imperfection and geometric nonlinearity into account, the whole process analysis under the action of dead and live loads was done to obtain the structure stability. The calculation results showed that each index can meet the requirements of specifications. Finally, the details of key bearings and cable joints were designed.

Keywords:suspendome; gymnasium; stability; nonlinearity; joint detail

*国家自然科学基金资助项目（51408414），教育部高等学校博士学科点专项科研基金（20130032120024）。

作者简介：闫翔宇，博士，高级工程师，一级注册结构工程师，Email: xy_yan2005@163.com。

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