体育馆大跨屋盖空间风振分析  

Spatial wind-induced vibration analysis for long-span roof of gymnasium

作　　者：史益军[1] 黄本才[1] 刘丹[1] 

机构地区：[1]同济大学航空航天与力学学院,上海200092

出　　处：《计算机辅助工程》2008年第1期21-24,29,共5页Computer Aided Engineering

摘　　要：采用高效的完全背景响应法与共振分量法,结合有限元法对某体育馆大跨屋盖进行较为准确的空间风振分析.在屋盖同步风洞试验的基础上,按空间随机风振分析方法考虑多个振型的影响,计算3个风向下屋盖各节点的静力等效风载荷和最大动位移以及杆件最大动内力,并给出位移和应力两个风振因数,为结构的抗风设计提供风载荷数据.数值计算结果证明完全背景响应方法与共振分量法在工程应用上的可行性,可为同类屋盖的风振分析提供参考.By using the effective methods of complete background component and resonant component, the relatively accurate analysis on spatial wind-induced vibration is done for the long-span roof of a gymnasium combining with finite element method. Based on the simultaneous wind tunnel experiment, the effect of multi-modes are considered according to the analysis method of spatial random wind-induced vibration. And the equivalent static wind load on nodes, maximum dynamical displacement of the nodes and maximum dynamical internal force of bars are computed under three wind directions. The displace- ment and stress wind-induced vibration factors are provided. So the wind load data is provided for wind-insist design of the structure. The numerical results prove that the methods of complete background component and resonant component are feasible in engineering application and can provide a reference for the wind-induced vibration analysis of similar structure.

关 键 词：大跨屋盖 风振分析 脉动风压谱 风致响应 风振因数 有限元 

分 类 号：TU312.1[建筑科学—结构工程]