两并列方形高层建筑局部风压干扰特性

Interference Effects on Wind Pressure of Two Square Tall Buildings in Sidebyside Arrangement

摘要:

对2个并列方形高层建筑模型进行了受扰建筑风压测量的风洞试验.根据试验结果,分析了施扰模型高度变化以及相对位置变化对受扰方形高层建筑表面局部风压的影响.结果显示,高度比固定、间距比变化时,平均和脉动风压系数干扰因子最大值在狭缝面和外侧面均随间距比的增大而减小,间距比等于2时,狭缝面的脉动风压放大较为显著,在前缘棱边的上端角部处为2.2,在迎风面和背风面则随间距比的增大而略有增大.间距比固定、高度比变化时,平均和脉动风压系数干扰因子最大值在狭缝面、外侧面和背风面均随高度比的增大而增大,狭缝面脉动风压增大最为显著,局部达2.7,在迎风面则受高度比变化的影响较小.

Abstract:

Wind tunnel tests were conducted to study the wind pressure on principal square building adjacent to another one in sidebyside arrangement at attack angle 0°.The interference effects on wind pressure of the principal building were analyzed with different heights and positions of the interfering building.The results show that with an increase in spacing ratio,associated with buildings of the same height,the maximum value of mean and fluctuating pressure coefficient interference factor decreases on the gap and outer side while slightly increases on the front and rear face.Notably,the fluctuating pressure coefficient interference factors on the gap side grow visibly,the maximum value is 2.2 on the top leading corner when the spacing ratio is 2.In addition,for effects on change of height ratio,the same index on the front side is affected little but increases on the other three sides with increasing height ratio,besides,the fluctuating pressure coefficient interference factors on the gap side increases apparently,its value even reaches 2.7.