Analysis of vortex-induced vibration and wind characteristics of Wuhan Yingwuzhou Yangtze River Bridge on April 26th，2020
CHEN Cheng1, ZHAI Hongnan2, LIU Huosheng2, SUN Pengjie3, WANG Biqiang3
1.Hubei Provincial Public Meteorological Service Center，Wuhan 430074，China；2.Wuhan Municipal Public Meteorological Service Center， Wuhan 430040，China；3.Hubei Provincial Meteorological Service Center， Wuhan 430074，China
Abstract：Using the vertical displacement data of the main span on the Hanyang side of the Wuhan Yingwuzhou Yangtze River Bridge on April 26， 2020， and the concurrent wind data from the bridge's meteorological station at different time intervals， combined with historical data from surrounding national meteorological stations， this study statistically analyzed the background wind and real-time wind characteristics of the bridge area， and the key wind parameters affecting the bridge， aiming to provide a reasonable explanation for the vortex-induced vibration phenomenon observed. The results are shown as follows. 1） The Yingwuzhou Bridge experienced two perceptible wave-like vertical vibrations around 2：00 and 18：30 on that day， with a maximum vibration amplitude exceeding 1.0 meters. 2） The wind speed began to increase at 8：00， with average and maximum wind speeds between 7~10 m·s-1 from 12：00 to 17：00， and peak wind speeds between 8-11 m·s-1， within the high-normal wind speed range. The wind direction was highly concentrated in the SW direction， nearly perpendicular to the Main span of the bridge， increasing the pressure on the bridge deck. 3） The turbulence intensity and gust factor were not significant from 12：00 to 18：00 that day. The tail of the fluctuating wind power spectrum at a frequency of 0.1 Hz （corresponding to a period of 10 seconds） had a certain resonance effect on some rigid building structures， but the area was small， having little impact on the bridge. Before the occurrence of the vortex-induced vibration， the wind speed gradually increased， and the energy accumulation lasted for a long time， but the key wind parameters remained within controllable limits， so the vibration amplitude of the bridge deck was limited.
2025, Vol. 59 
