贵阳奥体中心主体育场罩篷风洞试验及风荷载体型系数研究  

Wind tunnel test and shape coefficient of wind load research for roof of the main stadium in Guiyang Olympic Sports Center

作　　者：吴军 张忠 王树[2] 刘鑫刚[2] 黄季阳[2] 葛家琪[2] 

机构地区：[1]贵阳金阳建设投资有限公司,贵阳550001 [2]中国航空规划建设发展有限公司,北京100120

出　　处：《建筑结构》2010年第12期41-45,55,共6页Building Structure

基　　金：贵州省科技厅工业攻关项目([2010]3002);贵阳市科技局工业攻关项目[2010]

摘　　要：贵阳奥体中心主体育场由东、西两个呈牛角造型的罩篷构成,采用了预应力平面桁架斜交网格结构体系,最大悬挑49m。对其刚性模型进行了风洞试验,给出了平均风压系数、平均风荷载体型系数及风压分布规律并与规范计算值进行了比较,详细讨论了风向角对风压系数和体型系数的影响。结果表明:在大多数风向角下,西罩篷的风荷载要比东罩篷的大,罩篷立面迎风面都是正压,在所有风向角下罩篷上、下表面基本都是负压,负压分布的局部最大值通常出现的迎风罩篷上表面的前缘和下风向罩篷上表面的后缘部分。建议对于有上、下表面围护结构的建筑应分别按内、外风荷载体型系数设计。The roof of the main stadium in Guiyang Olympic Sports Center is composed of east and west roof like ox horns,and prestressed oblique in-plane truss lattice with maximum cantilever of 49m is adopted.The mean pressure coefficient,mean shape coefficient of the wind load and the wind pressure distribution on the roofs were obtained by the wind tunnel test of the rigid model and compared with the results of the local code.The effects of wind direction on the mean pressure coefficient and mean shape coefficient were researched in detail.The results indicate that the wind load of west roof is larger than that of east roof at most wind directions.The mean wind pressure on the windward profile is positive,while that on the outside and inside surfaces of roof is negative basically.The local maximum negative wind pressure distributes on the front edge of windward roof and the back edge of leeward roof generally.It is suggested that the roof cladding system with the inside and outside surfaces bearing wind load meanwhile should be designed according to the shape coefficients of the inside and outside surfaces respectively.

关 键 词：体型系数 刚体模型 风洞试验 风向角 风压分布 

分 类 号：TU249[建筑科学—建筑设计及理论]