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结合无锡新区科技交流中心的风洞试验,分析了有无周边建筑两种情况下的风压分布,并对梅花形屋盖的花蕊、花瓣凹弧面和花瓣凸弧面3个典型部位的风荷载体型系数进行了研究,获得周边高层建筑对大跨度曲面屋盖气动干扰的相关结论:虽然受扰建筑的最不利风向角和风压发生很大变化,但是最危险部位始终处于檐口附近,而且是负风压为主;在“兜风效应”的作用下,受扰建筑的风压会急剧增大;在“阻挡效应”的作用下,受扰建筑的风压存在由负压向正压变化的趋势;屋盖凹弧面的槽向与风向角一致时,存在涡流作用与“兜风效应”叠加的现象,受“吸”破坏力极大,在曲面屋盖设计中应予以重视。
Combining with the wind tunnel test of Wuxi New Area Science and Technology Exchange Center, the wind pressure distribution in two cases with or without surrounding buildings was analyzed. The winds of three typical parts of the flower-shaped roof, petal concave surface and petal convex arc surface were analyzed. Load body coefficient was studied to obtain the surrounding high-rise building on the long-span curved roof aerodynamic interference related conclusions: Although the most adverse wind direction of the disturbed building and wind pressure changes, but the most dangerous parts are always near the cornice, and is Under the action of “ride effect ”, the wind pressure of the disturbed building will increase sharply; under the effect of “blocking effect ”, the wind pressure of the disturbed building will be changed from negative pressure Positive pressure changes trend; roof concave arc surface groove angle and the wind direction angle, there is the phenomenon of eddy current and “Ride Effect ” superimposed by the “suction ” destructive power in the curved roof design Should be taken seriously.