大桥桥位不同重现期年最大风速推算  

Calculation of Annual MaximumWind Speed for Different Return Periods at Bridge Sites

作　　者：杨春明[1] 陈晓伟[1] 李碧寒 YANG Chun-ming;Chen Xiao-wei;Li Bi-han(Maanshan Meteorological Bureau,Maanshan 243000,China)

机构地区：[1]马鞍山市气象局,安徽马鞍山243000

出　　处：《安徽师范大学学报（自然科学版）》2024年第3期264-269,共6页Journal of Anhui Normal University(Natural Science)

基　　金：安徽省气象局自主创新发展专项(AHQXZC202220).

摘　　要：大风是威胁桥梁安全的主要灾害之一,是大型桥梁工程设计的关键,它影响到整个工程的安全性。科学的桥梁抗风设计可以有效预防或降低风险,减少损失。以安徽马鞍山长江大桥为例,借助当涂气象站1960—2022年逐年风速资料,采用时距一致性订正方法,建立相应时段当涂县气象站10 m高度10 min平均年最大风速系列(其中2000—2008年逐年最大风速,通过与未受城市化影响的马鞍山气象站比较进行了合理订正),利用耿贝尔法推算出大桥桥位区不同高度不同重现期10 min平均年最大风速。结果表明:马鞍山长江大桥桥位区不同重现期(100 a,50 a,30 a)10 m高度10 min平均年最大风速分别为28.8 m/s、27.2 m/s和26.0 m/s。利用指数和对数法,将桥位区风速外推到200 m以下每10 m高度层最大风速。Strong wind is one of the main disasters threatening the safety of bridges,and it is the key to the design of large bridges,which affects the safety of the whole project.Scientific wind-resistant design of bridge can effec-tively prevent or reduce the risk and reduce the loss.Taking Maanshan Yangtze River Bridge in Anhui Province as an example,with the help of the annual wind speed data of Dangtu meteorological station from 1960 to 2022,the annual average maximum wind speed series of 10 minutes at 10 m height of Dangtu meteorological station in the corresponding period were established by using the time-distance consistency correction method(The maximum wind speed from 2000 to 2008 was reasonably corrected by comparing it with the Maanshan meteorological sta-tion,which was not affected by urbanization).Using the Gumbel method to calculate the 10 minute average annu-al maximum wind speed at different heights and return periods in the bridge site area.The results show that the av-erage annual maximum wind speed at a height of 10 meters and 10 minutes for different return periods(100 a,50 a,30 a)at the location of the Maanshan Yangtze River Bridge is 28.8 m/s,27.2 m/s,and 26.3 m/s,respectively.Using exponential and logarithmic methods,the wind speed in the bridge site area is extrapolated to the maximum wind speed per 10 meters of height below 200 meters.

关 键 词：大桥 重现期 最大风速 耿贝尔 

分 类 号：P425[天文地球—大气科学及气象学]