双并列高层建筑平均风压系数干扰效应分析

Interference Effect on Average Wind Pressure Coefficients Between Double-Parallel High-Rise Buildings

基于风洞测压试验,通过改变双并列高层建筑间的间距和风向角,分析双并列且高度不一的高层建筑表面风压分布特性。结果表明,在单栋高层建筑周围加入施扰建筑形成双并列布局后,两建筑相对立面上的风压分布和风压值会发生较大变化。建筑表面的风压极值随着间距的增大而减小,且随着风向角从0°增大至90°,其由自上而下逐级分布逐渐转变为从左到右的规律分布,正负风压极值分别出现在建筑立面左右边缘的拐角处;当风向角为90°时,两建筑立面间形成加速气流,在建筑表面形成较大的负压,影响建筑结构的抗风性能。

The study analyzed the wind pressure distribution characteristics of double-juxtaposed high-rise buildings with different heights based on the wind tunnel pressure test by changing the interspaces and wind angles.The results show that,after adding a disturbing building next to a single high-rise building to form a double layout,the wind pressure distributions and wind pressure values on the opposite facades of the two buildings change greatly.The wind pressure extremes on the facades decrease with the increase of interspace,and gradually change from top-down distribution to left-right distribution with the wind angle extending from 0°to 90°.The positive and negative wind pressure extremes appear at the corners of the left and right edges of the building facade,and when the wind angle is 90°,the accelerated air flow is formed between the facades of the two high-rises that forms a large negative pressure on the facades,which has an impact on the wind resistance of the structure.