Research on design wind speed of typical bridge sites in coastal hybrid strong wind regions of China
To address the issue of difficulty in accurately estimating extreme wind speeds for different wind cli-mates in typical coastal areas of China with strong/typhoon mixed wind climates,a method for estimating ex-treme wind speeds considering both typhoons and non-typhoons is proposed.For non-typhoon data,the opti-mal probability density distribution is used to fit the annual extreme wind speed samples of meteorological sta-tions,and the uncertainty caused by limited sample size and the selection of different probability models are taken into consideration,to obtain the extreme wind speed range.The estimation uncertainty of generalized ex-treme value(GEV)and Pearson-Ⅲ(P3)is approximately 3 to 8 m/s.For typhoon data,the stochastic path simulation combined with three-dimensional typhoon wind field model is adopted to directly estimate the ex-treme wind speed at a height of 10 m and the reference height.Therefore,non-typhoon and typhoon events are treated as independent events,and the outer envelope of their extreme wind speed curves is used as the recom-mended design curve,and compared with the current regulations.The results show that using intervals to choose wind speed can ensure that the standard wind speed is generally 2 to 5 m/s lower than the upper enve-lope wind speed,close to the interval mean,and falls within the interval,providing a more comprehensive method for wind speed values.
万方数据
维普
