(上海现代建筑设计(集团)有限公司，上海 200041)

［摘要］上海世博轴索膜结构的设计经历了多种方案的比选。以世博轴特大型张拉索膜结构的设计过程为主线，采用非线性有限元方法对该项目各种方案的结构响应进行计算，分析比较了4个不同方案的结构受力和变形特征。在参考国内外相关规范的基础上，对安全系数取值、位移控制标准、等效风荷载取值问题做了深入探讨，总结出一套合理的设计方法。将非稳态计算得到的风荷载时程通过插值直接加载到有限元模型上进行动力时程分析，获得等效静力风荷载。

［关键词］索膜结构；结构选型；结构设计；数值风洞

Structural form selection and design of cable-membrane structure for EXPO Axis

Lu Dan, Li Chengming, Wang Dasui, Tian Wei(Shanghai Xian Dai Architectural Design (Group) Co., Ltd., Shanghai 200041, China)

Abstract:Taking the design process of EXPO Axis cable-membrane structure as clue, the mechanical evolution and scheme development were discussed for the membrane structure. Various schemes had been proposed along with the analysis of structural response using nonlinear finite elements. Based on worldwide specifications, codes and papers, the value of safety factor, the controlling standard of displacement and the equivalent static wind load were discussed. By interpolating, the wind loads from CFD simulation were directly acted on the FEM nodes to calculate the dynamic responses in time domain.

Keywords:membrane structure; structural form selection; structral design; numerical wind tunnel

*上海市科学技术委员会科研计划项目世博科技项目(08dz0580305)；国家科技支撑计划项目世博科技项目(2009BAK43B06)。

作者简介：卢旦，Email:dan-lu@xd-ad.com.cn。

参考文献

［1］胥传喜，武岳.膜结构设计(1)——膜结构的基本体系与方案选择［J］.工业建筑，2004,34(6):79-83.

［2］FORSTER BRIAN，MOLLAERT MARIJKE. 欧洲张力薄膜结构设计指南［M］. 杨庆山，姜忆南,译. 北京：机械工业出版社，2007.

［3］BERGER H. Form and function of tensile structures for permanent buildings［J］. Engineering Structure, 1999, 21(8):669-679.

［4］CECS 158：2004 膜结构技术规程［S］.北京：中国计划出版社，2004.

［5］卢旦，李承铭，王国俭.上海金茂大厦风振响应的CFD非稳态数值模拟分析［J］.土木工程学报，2008,41(8)：31-35.