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工程力学  2015 

黄河复杂地形桥位风特性现场实测

DOI: 10.6052/j.issn.1000-4750.2014.05.S031, PP. 233-239

Keywords: 复杂地形桥位,风特性,现场实测,风剖面,风攻角,脉动风

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Abstract:

结合某拟建黄河大桥,在大桥桥位附近建立一座高85m的测风塔,分别在测风塔10m、30m、50m及80m高度处设立观测层对大桥桥位处风特性进行现场实测,实测风速风向数据采用GPRS传输,基于MATLAB开发了相应的数据处理程序对实测风速数据进行处理。结果表明:桥位处平均风速沿高度方向总体服从幂指数分布,大风状况下风剖面指数拟合值为,接近规范推荐的B类地表。大风天气(10m高度处10min平均风速大于10m/s)大风时段10m高度处风攻角范围为-4.9°~6.7°,80m高度处风攻角范围为-4.4°~5.3°。桥面高度处脉动风紊流度及风谱等与规范推荐值总体比较接近。

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