并列圆角弧边三角形双塔层风力干扰特性研究

INTERFERENCE CHARACTERISTICS OF FLOOR WIND FORCES FOR ROUNDED CORNER ARC EDGE TRIANGULAR TWIN TOWERS UNDER PARALLEL ARRANGEMENT

采用刚性模型测压风洞试验方法,研究了双塔并列情况下不同建筑间距和排布方式对圆角弧边三角形高层建筑层阻力系数和层升力系数的影响规律。结果表明不同间距比下,施扰建筑对受扰建筑平均和脉动层风力系数的干扰效果有明显改变;单体建筑弧面迎风时会出现强烈的漩涡脱落;双塔并列弧面迎风时,施扰建筑在间距比很小时会抑制受扰建筑的漩涡脱落,从而显著减小其脉动升力。

Using the rigid model pressure measurement wind tunnel test techniques,the effect of different building distances and layout schemes on the layer drag coefficient and layer lift coefficient of rounded corner arc edge trian⁃gular twin-tower high-rise buildings under parallel arrangement are studied.The results show that under different spacing ratios,the interference effect of disturbing building on the mean and fluctuating layer wind coefficients of disturbed buildings has obvious changes.Strong vortex shedding occurs when the arc surface of a single building happens to be the windward face.For the twin tower parallel arrangement buildings under the windward condition,the disturbing building will inhibit its vortex shedding when the spacing ratio is quite small,leading to significant de⁃crease of the fluctuating lift force.