下游干扰体对上游高层建筑风力的影响

Interference Effects of Wind Forces of Downstream Buildings on Upstream HighRise Building

在用数值模拟和风洞实验方法对比研究两个方形高层建筑模型干扰影响的基础上,进一步用数值模拟方法研究了距离较近时下游干扰体对上游建筑的干扰影响.以广州合景大厦为背景,用数值模拟方法,并通过数值模拟与风洞实验平均风底部剪力的比较,得出当干扰的高层建筑处于下游或斜下游时,上游合景大厦的静风力比不受干扰时显著增大.说明在高层建筑密集、下游或斜下游建筑体量较大时,对上游建筑干扰后的静风力会有显著增加.

Tests of wind interference effects on two square tall building models are carried out on the basis of CFD and wind tunnel methods. A further analysis with numerical simulation shows the downstream buildings have marked effects on the wind forces of upstream building when the distance between buildings is short. Then a case study is conducted on Hejing High-Rise Building. When Hejing Building is located at the upstream of the surrounding buildings the mean wind loads is increased greatly in comparison with the case of single building, It means the huge downstream interference buildings have an increasingly effect on the wind forces of the principal building adjacent to surrounding buildings. The comparison of base mean shear forces of Hejing Building between numerical prediction and wind tunnel test verifies the conclusion about interference effects in this paper.