Study on the influence of voids on high-rise building on the wind environment

Li, Yangluxi; Chen, Lei

In order to further investigate the influence of the wind on the surrounding wind height environment under different conditions of the number of openings. To set different points along a horizontal line at the height of 1.5 m to record the wind speed locating at the centre of each model. As can be seen from the analysis of Figs. 8(c), (d) at the pedestrian height the increase of the number of voids is beneficial to the amplification of the wind speed at the pedestrian height and the improvement of the wind environment. For example, the wind amplification factor of the case A9 hole is the best, and case A0 is the worst. Moreover, under the condition of 7, 9 concavities, the maximum value of the WVA is also the biggest among all models. For case A0, the wind amplification coefficient of the pedestrian height at the back of the building is small, which is less than 1, indicating that the wind speed diminishes apparently after flow blowing through the building. Furthermore, for cases A7 and A9, WVA values starts to increase around 75 m, and reaches the extreme value when it is about 125 m. Although the extreme value is still less than 1, it is far more than cases A0 and A3.