AERO-INTERFERENCE OF SURROUNDING HIGH RISE BUILDINGS ON LARGE-SPAN CURVED ROOF
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摘要: 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。Abstract: Based on wind tunnel test of Wuxi New District Science and Technology Communication Center, the windpressure distribution was analyzed under the condition of with and without surrounding buildings. Moreover, the shapecoefficients of three typical regions of the plum-blossom-shaped roof were studied. Several conclusions about aerointerference of surrounding high-rise buildings on large-span curved roof were provided. Although the mostdisadvantageous wind direction and wind pressure have changed while aero-interference occurred, the roof of theinterfered building still mainly bear negative wind pressure and the most fragile location is still along eaves. Windpressure of the interfered building is acutely increased under the action of wind-catching effect. Wind pressure of theinterfered building changes from negative to positive value under the action of wind-obstructing effect. The concave ofroof will bear the greatest sucking load when the direction of its trough is identical to wind direction because eddycurrents cooperate with wind-catching effect, which should be focused in the design of the curved roof.
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Key words:
- surrounding building /
- large-span /
- curved roof /
- wind tunnel test /
- wind-caching effect /
- aero-interference
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