2011年1月 施工技术 第40卷第1期 CONSTRUCTION TECHNOLOGY 29 上海世博会主题馆结构设计与建造方面的一些思考 丁洁民,吴宏磊 (同济大学建筑设计研究院(集团)有限公司,上海200092) [摘要]主题馆作为2010年上海世博会“一轴四馆核心建筑群的重要组成部分,是国内最大跨度展厅之一.针 对屋盖跨度大、整体结构超长且平面不规则等问题,对屋盖结构体系选型和下部框架支撑体系选型进行了详细比 选,最终,屋盖采用由新型索撑张弦桁架与立体桁架组成的长度为270m的4跨连续梁结构,下部钢框架采用了钢- 黏滞阳尼支撑形成的混合支撑框架体系.在结构设计阶段以及施工过程中,针对施工中的一些关键技术问题进行 了详细研究,主要包括126m跨度张弦桁架的施工张拉过程以及关键节点设计,屋盖支座施工过程释放,以及大跨 度预应力楼面的施工张拉问题. [关键词]上海世博会主题馆;大跨度结构;张弦桁架;混合支撑体系:施工阶段;预应力张拉 [中图分类号]TU318 [文献标识码]A[文章编号]1002-8498(2011)01-0029-07 Some Key Issues of Structural Design and Construction of Theme Pavilion of Expo 2010 Shanghai Ding Jiemin.Wu Honglei (Architecture Design Research Institute of Tongji University(Group)Co.Ltd. Shanghai 200092 China) Abstract:As an important building of the core area“one axis and four pavilions'"of Expo2010 Shanghai China the Theme Pavilion is one of the largest halls in China.As the roof span is very large and the whole structure is super long and irregular plane the roof structural system and the braced frame system are pared in detail.For the final design the roof structural system adopts a 270m long four-span continuum beam which has a 126m-span truss string structure and three-span spatial trusses and the steel frame adopts mixed column brace system which is posed of steel brace and energy dissipation brace.Some construction problems are discussed including stressing process of 126m-span truss string structure and key joints design roof supporting release in construction and stressing process of lar...