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对圆柱形建筑双幕墙进行了风洞试验,着重分析了不同分隔形式的圆弧双幕墙的风载特性.结果表明:圆弧双幕墙的内幕墙各部位的风荷载比较一致,且随着圆心角的减小,内幕墙所承受的风荷载增大;圆弧双幕墙的外幕墙各部位的风荷载分布则很不均匀,圆弧端部区域的风荷载比圆弧中间区域的大,且由于外幕墙端部测点的内外压随风向角变化不同步,存在相位差,导致了其净风压比单层幕墙的风荷载还大,这在双幕墙的抗风设计中应特别注意.
The wind tunnel test was carried out on the double-curtain wall of cylindrical building, and the wind load characteristics of the circular arc double-curtain wall with different partition forms were emphatically analyzed.The results show that the wind load of each part of the inner wall of arc double-curtain wall is relatively consistent, The wind load on the inner wall increases; the wind load distribution on the outer wall of the circular arc double-curtain wall is very uneven, and the wind load on the end of the circular arc is larger than the middle area of the arc As the external pressure at the end of the external curtain wall measuring point changes with the wind angle is not synchronized, there is a phase difference, resulting in a net wind pressure than the single curtain wall wind load is also large, which should be particularly noted in the double-curtain wall wind design .