Study of the correlation between the measured wind field and wind pressure on a high-rise building

Based on the field measurement and wind pressure measurement on the surface of a super-tall building on the coast of the Xiamen city during the passage of typhoon Usagi in Sep-tember 2013,the wind field was measured by a propeller anemometer placed at the roof of the test building,and the wind pressure was measured by 18 pressure sensors stuck on the glass wall on the refuge floor at the height of about 70m.This paper presents selected measurement data (such as the mean wind direction,mean wind speed,turbulence intensity,mean pressure,and soon).Through in-depth analysis it is shown that the 10min wind direction and wind speed are relatively stable,the filed turbulence intensity of typhoon Usagi is normal,and with the increase of wind velocity the turbulence intersity varies steadily.The wind pressure coefficient shows the following characteristics:the wind pressure coefficient of each measuring point on the windward side shows a relatively large value in the middlepoint and smaller values from the middle to each end point,but the gap is not great.Meanwhile,the correlation between the measured wind field (the mean and RMS wind velocity,the turbulence intensity)and wind pressure (mean and RMS wind pressure)on the windward side is analyzed from two aspects.One is to investigate the corre-lation in 8 selected different time intervals:1s,2s,3s,10s,30s,1min,3min,10min,and the results of the research clearly reveal that:when the average time interval is taken as 3s,there is a relatively high correlation between the measured wind field and wind pressure.The other one is to evaluate the correlation under different wind directions:30.8°,33.2°,36.7°,39.4°,42.1°, 45.3°,47.6°,49.5°,and as the wind direction is roughly perpendicular to the windward wall (when the wind direction is 39.4°),the correlation between the wind field and the wind pressure is relatively large.