(北京市建筑设计研究院 北京 100045)
【提要】 大开口环形空间索桁架结构是由内环索将平面索桁架连成整体的一种索杆张力结构，目前世界上已有几个大型体育场采用了这种结构体系。介绍了这种结构体系的稳定性分析理论和自应力模态计算方法，研究了这种结构体系自应力模态的特点和力学性能。分析表明结构空间性能好，内力分布均匀，对非对称荷载有较强的适应能力，并具有较高的承载能力。
【关键词】 索桁架 内环索 自应力模态 静力性能 结构承载力
Research of Space Cabletruss Structure with Large Opening Annular Plan/Zhu Zhongyi, Ke Changhua(Beijing Institute of Architectural Design, Beijing 100045, China)
Abstract:The space cabletruss structure with large opening annular plan is one of cablestrut tensile structures, composed plan cabletruss structures connected by inner rings. Several stadiums in the world have adopted the structural type. The cablestrut structure's stability theory and method of solving the selfstress modes are introduced. The study about characters of the selfstress modes and static performance is carried out. It is shown that the structure is a good spatial structural system which internal force distributes uniformly, can fit better unsymmetric load and has excellent loadcarrying capacity.
Keywords:cabletruss structure; inner ring; states of selfequilibrium stress; static performance; loadcarrying capacity