【摘要】 利用5a的多层梯度测风资料,对工程区3个测点与参照气象站风速的相关关系、风随高度变化的规律以及阵风系数等进行了分析研究。结果表明,工程区3个测点与参照气象站风速之间的关系均以线性方程拟合效果最佳。利用这些线性方程对工程区短期测风资料进行了延长,并采用极值Ⅰ型分布计算了10m高处重现期10min平均最大风速。然后,根据风随高度变化的规律和阵风系数,计算了桥面高度各重现期瞬时最大风速。更多还原

【Abstract】 Based on multi-layers gradient observations for five years,the correlations of wind speeds between three measuring sites and reference meteorological station, the changes of wind with altitude and gust factor were analyzed for the project region. The results showed that linear equations were optimal in fitting wind speeds correlations between three measuring sites and reference meteorological station.Short-term wind data for the project region were prolonged according to the linear equations, and by using Extreme Type-Ⅰdistribution.Ten minute average maximum wind speeds were calculated at different return periods at 10 meters. Then, based on the changes of wind with altitude and gust factor, instantaneous maximum wind speeds were calculated for different return periods at bridge surface height.更多还原