大跨度高空弧形连廊模型风洞试验研究

介绍了杭州市民中心建筑群模型测压的风洞试验,给出了大跨高空弧形连廊表面的平均(静)风压系数、平均风压和平均风荷载体型系数值,详细讨论了风场和风向角对风压系数和体型系数的影响.结果表明:连廊迎风面处于正压区,而背风面、顶面和底面处于负压区;连廊顶面风载狭缝效应十分明显,而底面不太明显;连廊的整体体型系数大于规范对弧形建筑的规定;按规范(基于平均风压)计算的用于连廊覆面设计的风压结果比应用统计方法(基于平均风压和脉动风压)计算的结果偏小.

Wind Tunnel Test Study on Wind Load Characteristics for Long Span Steel Arc Skybridge Model

This paper introduces the details of the wind tunnel of Hangzhou citizen center,which is a tall building cluster with skybridge between individual buildings.The results of the wind tunnel test of the skytridge are presented,including the mean pressure coefficients and body shape coefficients.The contour curves of mean wind pressures for the most unfavorable conditions are illustrated showing clearly the characteristics of the wind pressure distributions on the skybridge.The paper also reveals the effects of wind turbulence and wind direction condition on the mean pressure coefficients and mean body shape coefficients.Results indicate that the mean wind pressures on the windward wall are positive while those on the back wall,bottom surface and roof of corridor are all negative.Unlike the bottom surface of the skybridge,there is an obvious "canyon effect" on the roof of skybridge.The mean body shape coefficients for the whole structure are larger than the value specified by the code.The wind pressures for the cladding design calculated by the code are smaller than those from statistical method.