大跨柔性屋盖矩形截面结构横风向共振分析  

Analysis of Crosswind Resonant Response of Large span Flexible Roof Structures with Rectangular Section

作　　者：王国砚[1] 王修琼[1] 林炽杰 张相庭[1] 

机构地区：[1]同济大学,上海200092

出　　处：《结构工程师》1999年第4期27-31,共5页Structural Engineers

基　　金：国家自然科学基金九五重大项目

摘　　要：本文根据大跨柔性屋盖矩形截面结构的特点，从空间计算模型出发建立这类结构横风向共振响应的计算方法，得到了考虑多振型贡献的位移响应和等效风振力计算式；文中还对有关参数的取值进行了讨论。工程算例的结果表明，对于空间振动特征较强、固有频率较密集的屋盖类结构，考虑多振型贡献与只考虑共振振型贡献相比，计算结果有很大差别。In this paper, computational method is developed for crosswind resonant response of large span flexible roof structures with rectangular section from the point of view of 3 D model; expressions of resonant response computation in which multi mode contribution is taken into account are obtained; and the evaluation of certain coefficients is discussed. The result of an engineering example shows that, for roof structures with 3 D features, these expressions can give quite different results from those given by the expressions in which only the resonant mode is taken into account.

关 键 词：大跨度 屋盖结构 横风向共振 矩形截面 

分 类 号：TU231[建筑科学—建筑设计及理论] TU359.01