(北京工业大学建筑工程学院 100022)
【提要】 以2008年奥运会羽毛球比赛馆张弦穹顶结构为例，对张弦穹顶和单层网壳进行了内力、节点位移、特征值屈曲和非线性屈曲的荷载位移平衡路径的跟踪分析，阐述了张弦穹顶结构的优越性。对联方型、肋环型、肋环斜杆型张弦穹顶的分析比较表明，联方型网格经济合理，更适用于张弦穹顶结构。分析了网格密度、矢跨比、撑杆长度、初始缺陷、钢索预应力等设计参数的影响，得到了具有工程实用意义的结论。分别以网壳杆件内力和节点位移为目标函数编制了优化程序，研究了钢索合理预应力度的确定方法。
【关键词】 张弦穹顶 整体稳定 初始缺陷 预应力度 非线性屈曲特征值屈曲
Suspendome Optimal Design of Olympic Badminton Stadium Based on Integral Stability/
Zhang Ailin,Liu Xuechun(Civil Engineering Department of Beijing Institute of Technology,Beijing 100022,China)
Abstract:With the suspenddome of Olympic badminton stadium,analysis to suspenddome and single layer shell including force,displacement,eigenvalue buckling and nonlinear buckling is conducted separately,and the advantages of suspenddome are provided. The analysis of Lamella's,ribloop,ribloop tilted bar shell indicates that Lamella's shell is the most effective for suspenddome. The influence of density of net,risespan ratio,height of strut,initial defect,prestress of cable are analyzed,and some engineering valuable conclusion are drawn for practical design. Programs are developed with the axis force and joint displacement of upper dome as  object function respectively,and the effective method of prestress degree is developed.
Keywords:suspendome; integral stability; initial defect; prestress degree; eigenvalue buckling; nonlinear buckling
*国家自然科学基金资助项目(50278005)，北京市科委科技奥运专项资助项目(Z0005191040111)。