CHARACTERS OF WIND LOADS ACTING ON LONG-SPAN ROOF OF IRREGULAR SHAPE
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摘要: 结合深圳市民中心风洞试验结果,分析了复杂体型大跨屋盖的平均风压及均方根风压分布特性,结果表明:风吹经屋盖上翘角部时由于流线分离所产生的漩涡,导致屋盖角部的平均风压和极值风压都远大于屋盖中部。同时还给出屋盖表面典型测点的三维功率谱,结果表明:屋盖测点风压的能量基本集中在迎风状态的低频部分,尾流和高频部分的风压能量较小。Abstract: This paper presents results from a wind tunnel study of wind pressures on an extra-long-span roof structure.In this study,mean,root-mean-square and peak wind pressure coefficient distributions on the roof are presented and discussed.The result presents maximum mean and peak pressure coefficient at corner of the roof.Major intermittent wind energy distribution is presented when the 3-D power spectrum density(PSD) of some typical measuring points on the roof is discussed.
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[2] Melbourne W H.The Relevance of Codification to Design//Proc.4th Int.Conf.on Wind Effects on Building and Structures.Heathrow:1975:785-790 GB 50009-2001 建筑结构荷载规范 [3] Melbonrne W H.Turbulence Effects on Maximum Surface Pressures-A Mechanism and Possibility of Reduction//Proc.5th Int.Conf.on Wind Engineering.Fort Collins:1979:541-552 [4] Cook N J.Reduction of Wind Loads on a Grandstand Roof.J.Wind Eng.Ind.Aerodyn,1982(10):373-380 [5] 黄本才.结构抗风分析原理及应用.上海:同济大学出版社,2001:49
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