【摘要】 双层通风幕墙的抗风设计需考虑外层幕墙的内、外表面风压以及内层幕墙的外表面风压,其风荷载取值不同于普通单层幕墙,使得其风载取值变得复杂。通过多个不同截面形式的模型进行双层幕墙压力分布风洞试验研究。介绍风洞试验模型的设计及数据处理方法,着重分析一字形双层幕墙和L形双层幕墙的内外层幕墙的平均风压分布。试验结果表明:L形双层幕墙和一字形双层幕墙的平均风压分布有很大的不同。对于一字形双层幕墙,无论是正风压还是负风压,都主要作用在内幕墙上,外幕墙除拐角区域外所承担的风压很小。对于L形双层幕墙,其外幕墙的正风压要比内幕墙的风压大;负风压时,L形双层幕墙的短边区域是外幕墙所承担的风压大于内幕墙,其长边区域则是内幕墙所受的风压要大于外幕墙。更多还原

【Abstract】 For buildings with double-skin facade,there are three surfaces subjected to wind pressure due to the airflow between the double facades.Those are the outside and inside surfaces of the external skin facade and the outside surface of the internal skin facade.Consequently,the wind loads acting on the double skin facades become complicated.Some skin facade models which shapes of different section were tested in a wind tunnel,and the methods of the wind tunnel test and data processing were presented in detail.The mean wind pressure distribution on the internal and external skin facade of straight facade and L-section facade were discussed.Results showed that mean wind pressure mostly acts on internal facade for the straight facade,while for the L-section facade, compression force acted on the external facade is larger than that on the internal facade,and it has the same distribution for the suction acted on short side of L-section facade,but the suction′s distribution acted on long side of Lsection facade is reverse.更多还原