大跨度挑蓬气弹模型风振系数风洞试验  

Wind tunnel test of wind load factors of long-span cantilevered roof aeroelastic model

作　　者：鲜荣 廖海黎[2] 李明水[2] 

机构地区：[1]广东公路建设有限公司,广东广州510600 [2]西南交通大学风工程中心,四川成都610031

出　　处：《四川建筑科学研究》2010年第2期51-54,共4页Sichuan Building Science

摘　　要：气弹模型试验能够全面考虑结构和气流间相互作用,真实地反映结构在大气边界层中的受力特性和响应形式,是结构风振研究的一种重要手段。探讨适用于复杂外形建筑结构模型设计相似准则,通过一体育场大跨度挑蓬缩尺比1:200气弹模型,在模拟大气边界层风场及场址地形地物的条件下,测量体育场罩棚表面的位移响应,进而得到罩棚结构设计需要的风振系数。The interaction between structures and wake can be fully taken into consideration through aerodynamic elastic models which can get structure＇s real force characteristics and response formats in atmosphere boundary layer.Then aerodynamic elastic model has been an important method to research wind induced vibration of structures.However,the similarity criterion should be discussed in detail so as to properly design aerodynamic elastic models of building structures with complex shapes.An aerodynamic elastic model,whose geometry scale is 1：200,is designed by taking one stadium with long-span cantilevered roof as an example.The displacement responses of surface of the roof are measured based on simulation of atmosphere boundary layer wake and terrain and buildings around the cantilevered roof.Furthermore,the wind load factors are calculated to give reference to structure designation of the roof.

关 键 词：气弹模型 相似准则 风洞试验 风振系数 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]