风向对相邻建筑风压分布的影响研究

通过风洞实验研究了风向对两个和三个邻近建筑风压分布的影响特性.实验结果给出了在不同风向角下,作用于受扰建筑上的平均和脉动风压系数.当受扰建筑处于下游位置时,建筑之间的干扰效应主要表现为遮挡影响,建筑物上的总体风压系数不是很大,但在建筑物表面上有时会产生局部较大的负压系数.另外,在某些风向角下由于受到上游分离气流的影响,在下游建筑的局部表面又会出现较大正压.这些结果可供建筑布置和结构设计时参考.

Influence of wind direction on pressure distributions of adjacent buildings

Wind tunnel experiments were carried out to investigate the influence of wind direction on the wind pressure of proximite buildings. Mean and fluctuating pressure coefficients on a high building, at sixteen different wind incidences and with one and two interfering buildings, were measured in the tests. This paper presents the characteristics of wind pressure on the building, which varies with the incident wind angle and with the numbers of adjacent buildings. Due to the variation of wind angle and the interference effects, the complex feature of pressure distributions can be found on the downstream building surfaces for building group arrangement at certain angle of wind attack. Some area of the interfered building for such configuration, in comparison with one single building's, may undergo very strong positive or negative pressures.