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借助风洞动态同步测压试验,对某办公楼镂空外墙双层幕墙平均风压分布特性进行分析,根据测点风压时程及其概率密度分布,并基于第三、四阶矩统计量对脉动风压分布的非高斯特性进行了描述。结果表明,外层幕墙的内表面风压和内层幕墙的外表面风压几乎相等,外层幕墙的净风压很小;建筑双层幕墙的风压脉动非高斯性的区域主要为建筑迎风下游尾流区,而外层幕墙由于内外压平衡的原因,其内表面边缘位置基本符合高斯性。在进行幕墙结构设计时,应对非高斯分布区域的风荷载设计予以特别重视,以保证其安全性。
Based on the dynamic synchronous pressure measurement test in wind tunnel, the average wind pressure distribution characteristics of the double-wall curtain wall with an external wall of an office building are analyzed. According to the wind pressure time history and its probability density distribution at the measuring point and based on the third and fourth moment statistics The non-Gaussian characteristics of the fluctuating wind pressure distribution are described. The results show that the pressure of the inner surface of the outer curtain wall is almost the same as the pressure of the outer surface of the inner curtain wall, and the pressure of the outer curtain wall is small. The non-Gaussian wind pressure pulsation of the double-wall curtain wall is mainly the construction of the windward Downstream wake area, and the outer wall due to internal and external pressure balance reasons, the inner surface of the edge position basically consistent with Gaussian. In the design of curtain wall structure, special attention should be paid to wind load design in non-Gaussian distribution area to ensure its safety.