| Summary: | The wind climate characteristics around the Wuhan Qingshan Yangtze River Highway Bridge are analyzed based on the wind data of the newly built wind tower at the Bridge site, Huangpi and the Provincial Agricultural Exhibition Center automatic weather station. The basic wind speed at the automatic weather station is estimated by the extreme value type Ⅰ distribution. Then, combined with the wind data at the bridge site, the design wind speed is calculated based on the basic wind speed by the ratio method. Finally, the characteristics of atmospheric turbulence are analyzed in the near surface layer around the bridge. Results are as follows. (1) The annual maximum and extreme wind speeds in the bridge area are 17.0 and 20.9 m·s-1, respectively. Mean number of high wind days is 5.8 d, and the most frequent wind direction is NNE. (2) The annual 10min average maximum wind speed (designed wind speed) in the bridge area at 10m height is 25.6 m·s-1 in a hundred years reappearing period. (3) When wind speed is high, the vertical turbulent flux of horizontal momentum is large and the turbulence parameter is small. The turbulence spectral density is higher by 1-2 orders of magnitude at high twind speed than at low wind speed. The wind attack angle in 1 h is 0 to 3 degrees when the extreme wind speed occurs.
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