尾流受扰下复杂体形高层建筑的风压分布特性

本文结合汕头粤东信息大厦的风洞试验,详细分析了复杂结构断面建筑物在其尾流受到下游结构干扰下的风压分布特性。试验表明:处于受扰物体尾流边界上的施扰物体可以降低来流在受扰物体上的分离速度,从而使最大负压系数降低。当施扰物体处于被扰物体尾流边界的某些位置时,被扰物体表面的最大负压系数受到显著影响,最多可降低45%。文中还对典型断面结构进行了进一步的试验研究,在验证以上的结论同时,试验结果也显示,施扰建筑位于被扰结构临近的较大区域,其风压增大15%以上,最大可增大39%。本文所得的一些结论可为相应的工程提供参考。

Wind Pressure Distribution on Complex Shape Tall Buildings Under Wind Action with Interference Effects by a Downwind Building

Based on the wind tunnel test of the Ea st Guangdong Information Building o f Shantou,the wind pressure distribution on complex exterior ge ometry building with an interfering building in its wakes has been researched.The maximum suction coefficient of the b uilding surface can be interfered ob viously by a downwind building.The w ind pressure of the interfered building can be decreased by 45%in case the int erfering building is situated at som e special position of the interfered building' s wake boundary.An additional test i n consideration of the interference between two prismatic buildings has been carrie d out to verify the observed result.T he result also shows that the wind pre ssure can be increased by more than 15%by the exis tence of an adjacent building due to t he narrow pipe effect.The observed maximum interference factor can be e ven up to 1.39.The results given by th is paper may be valuable for building designers and planners.