摘要
青岛大剧院屋盖钢结构采用非等高双向正交桁架体系,跨度85 m,最大悬挑长度达16 m。采用有限元非线性分析理论对该大跨空间钢桁架屋盖结构的整体稳定性进行了全过程跟踪分析,分别讨论了该大跨结构在有无初始安装偏差影响下的稳定性态;并对钢桁架屋盖结构进行了动力分析,研究了结构的自振特性,采用振型分解反应谱法对结构进行了抗震分析,给出了结构地震内力系数的分布规律,为结构设计提供了详细可靠的数据,为此类大空间结构提供了有价值的参考资料。
The steel roof of Qingdao grand theatre is a large span spatial truss structure with a span of 85 m and a cantilever of 16 m.The space truss is composed of two-way orthogonal plane trusses with different height.The geometrically nonlinear overall stability analysis with or without considering the effects of geometric imperfections of the large span steel structure has been conducted in this paper by means of the nonlinear finite element method.And the dynamic characteristics have been studied by virtue of the seismic response spectrum method.The distribution characters of seismic inner force coefficients of the structure are provided for the design of the structure.It is a valuable reference for the similar large span spatial structure.
出处
《结构工程师》
2007年第4期24-29,共6页
Structural Engineers
关键词
整体稳定性
特征值分析
几何非线性分析
振动模态
地震内力系数
overall stability,eigenvalue analysis,geometric nonlinear analysis,seismic mode,seismic inner force coefficient
