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胡昌琼, 张雪婷, 王必强, 方怡, 童奇, 丁丽丽. 2019: 武汉青山长江公路大桥设计的风参数研究. 暴雨灾害, 38(3): 276-283. DOI: 10.3969/j.issn.1004-9045.2019.03.010
引用本文: 胡昌琼, 张雪婷, 王必强, 方怡, 童奇, 丁丽丽. 2019: 武汉青山长江公路大桥设计的风参数研究. 暴雨灾害, 38(3): 276-283. DOI: 10.3969/j.issn.1004-9045.2019.03.010
HU Changqiong, ZHANG Xueting, WANG Biqiang, FANG Yi, TONG Qi, DING Lili. 2019: Analysis of wind parameters for Wuhan Qingshan Yangtze River Highway Bridge. Torrential Rain and Disasters, 38(3): 276-283. DOI: 10.3969/j.issn.1004-9045.2019.03.010
Citation: HU Changqiong, ZHANG Xueting, WANG Biqiang, FANG Yi, TONG Qi, DING Lili. 2019: Analysis of wind parameters for Wuhan Qingshan Yangtze River Highway Bridge. Torrential Rain and Disasters, 38(3): 276-283. DOI: 10.3969/j.issn.1004-9045.2019.03.010

武汉青山长江公路大桥设计的风参数研究

Analysis of wind parameters for Wuhan Qingshan Yangtze River Highway Bridge

  • 摘要: 利用黄陂气象站、武汉青山长江公路大桥桥位处新建的测风塔和湖北省农展中心自动气象站风资料,采用极值Ⅰ型分布法对武汉青山长江公路大桥设计的风参数进行研究,结果表明:(1)桥位区10 m高度年最大、极大风速为分别为17.0 m·s-1、20.9 m·s-1,年均大风日数为5.8 d,年最多风向为NNE;(2)气象站100 a重现期10 m高度10 min平均年最大风速(基本风速)为25.6 m·s-1,桥位处100 a重现期10 m高度10 min平均年最大风速(设计风速)为29.0 m·s-1;(3)风速较大时水平动量的垂直湍流通量较风速小时大、湍流参数较风速小时小、湍流谱密度值较风速小时增大1~2个量级;极大风速发生时1 h内的风攻角为0 °~3 °。

     

    Abstract: 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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