某规划展览馆大跨预应力钢筋混凝土屋盖结构设计  

Structural Design of A Large-span Prestressed Concrete Roof

作　　者：李刚[1] 潘从建[1] 张吉柱[1] 张建林[1] 

机构地区：[1]中国建筑科学研究院,北京100013

出　　处：《建筑科学》2014年第9期112-116,共5页Building Science

基　　金：国家"十二五"科技支撑计划课题<建筑结构绿色建造专项技术研究>(2012BAJ03B06)资助

摘　　要：通过引入双向预应力,对某规划展览馆大跨度屋盖结构进行优化设计。采用空间有限元软件建立结构的整体有限元模型,计算分析该结构的次内力及温度作用效应,并进行预应力施工阶段的反拱分析。结果表明,该结构由预应力产生的次内力及温度作用效应对结构影响较小。该结构的平面洞口、错层屋盖及较小的抗侧刚度有利于减小结构次内力及温度效应,说明了该屋盖采用大跨双向预应力的合理性。A large-span concrete roof is optimized by using post prestressing technology. The effects of secondary internal forces and temperature are analyzed using spatial FEM model for the structure, and the camber during the building period is studied. The results show that the influences of secondary internal forces and temperature are not notable to the structure. The secondary interior force and temperature effects decrease because of openings, staggers roof and small lateral stiffness. The use of post prestressing technology for this large-span concrete roof is reasonable and beneficial.

关 键 词：预应力 次内力 反拱 温度作用 

分 类 号：TU378[建筑科学—结构工程]