大跨屋盖结构风荷载特性的试验研究  

Experimental Investigation of the Wind Load Characteristics of Long Span Roof

作　　者：李秋胜[1,2] 陈伏彬[1] 傅继阳[3] 谢壮宁[4] 

机构地区：[1]湖南大学建筑安全与节能教育部重点实验室,湖南长沙410082 [2]香港城市大学建筑系 [3]暨南大学土木工程系,广东广州510006 [4]汕头大学土木工程系,广东汕头515063

出　　处：《湖南大学学报（自然科学版）》2009年第8期12-17,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50578061;506080371);广东省科技计划资助项目(2006B37201011)

摘　　要：在大气边界层风洞中通过模拟大气边界层风场对广州国际会展中心模型进行风压分布风洞试验.得到了平均风压系数、极小风压系数的等值线图,同时分析了位于高湍流区域的大跨屋盖的平均风压和脉动风压分布特性、相干特性以及相关系数.研究结果表明:负风压主要发生在迎风角区,但在下风向会出现正压力;脉动风压相干性随着频率与距离的增大而减小.A detailed test of the wind pressure distribution of the Guangzhou International Convention ＆ Exhibition Center was carried out in a Boundary Layer Wind Tunnel. The contours of the mean and minimal wind pressure coefficients were presented. The analysis of the characteristics of the mean wind pressure, fluctu- ating wind pressure, coherence functions and correlation coefficients of the long-span roof structure located in the high turbulence district were conducted. It has been found that high negative pressure occurs on the roof comer on the windward and positive pressure will occur on the leeward, and that the coherence functions of fluctuating pressure decrease when the frequencies and the distance between the two taps increase. The results will be very useful for the design of future long-span roof structures.

关 键 词：大跨屋盖 风洞试验 风载分布 风压测量 

分 类 号：TV314[水利工程—水工结构工程]