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大尺度的建筑物和密集的建筑群都会对其周边的风环境造成较大的影响,并可能引起行人风环境问题。首先阐述了行人风环境评估的超越阈值概率方法,提出了综合考虑平均风和阵风影响的行人风环境评估标准;其次,结合某半开敞式的大跨空间建筑,统计了该地区风速气象观测资料并估计了概率参数;再次,使用计算流体力学数值风洞技术,获得了8个风向下的风场分布;最后,给出了场地全风向超越不舒适风速阈值的概率分布图,评价了该建筑的行人风环境。结果表明:该文所述方法能够给出复杂建筑的行人不舒适度和危险度详实评估结果。
Large-scale buildings and densely populated buildings will have a greater impact on the wind environment around them and may cause pedestrian wind and environmental problems. Firstly, the threshold probability of pedestrian wind assessment is expounded, and the standard of assessment of pedestrian wind considering the effect of average wind and gusting is put forward. Secondly, the wind speed meteorological observation Data and estimated the probability parameters. Thirdly, using the CFD numerical wind tunnel technique, the wind field distribution under eight wind directions is obtained. Finally, the probability distribution map of the total wind direction over the uncomfortable wind speed threshold is given, The pedestrian wind environment of the building. The results show that the method described in this paper can give a detailed assessment of pedestrian uncomfortableness and risk in complex buildings.