Wind characteristics and responses of Xihoumen Bridge during typhoons based on field monitoring

Abstract

Based on the field monitoring data from the structural health monitoring system of Xihoumen Bridge, the full-scale wind field characteristics (10-min mean wind speed and direction, turbulence intensity, gust factor, wind spectrum power density, and integral length) were calculated. Moreover, the relationship between turbulence intensity and mean wind characteristics (10-min mean wind speed and mean wind direction), the relationship between gust factor and mean wind characteristics, and the relationship between gust factor and turbulence intensity were analyzed. Additionally, wind-induced responses during Typhoons Meifa, HaiKui, and Chan-hom were analyzed and compared with designed values. The analysis results can provide a basis for the formulation of emergency plans and management measures when the bridge is hit by typhoons.