Non-Gaussian features of fluctuating wind pressures on rectangular tall buildings with large side ratio
To investigate the non-Gaussian features of fluctuating wind pressures on rectangular high-rise buildings with large side ratios,wind tunnel tests were conducted on scale models with side ratios ranging from 1/9 to 9.Based on the results,the third and fourth statistical moments of wind pressures on building surface were analyzed.Zones of Gaussian and non-Gaussian were classified for rectangular buildings with various side ratios.The relationship between spatial correlation coefficient of wind pressure and non-Gaussian intensity was studied and a new method for estimating the mean reattachment length at building side wall was proposed by evaluating the correlation coefficient of wind pressure.The results show that on the side wall,the non-Gaussian wind pressures are related to the distance from the leading edge.Apart from the non-Gaussianity in the corner of windward wall,separated flow regions of side wall and leeward wall noted by some literature,wind pressures behind the area where reattachment happens present non-Gaussian nature as well.The correlation coefficient method proposed in this paper has good accuracy in calculating the mean reattachment length,and the mean reattachment length calculated by the correlation coefficient method along the height changes in a parabolic shape.
万方数据
维普
