title: Study on typhoon characteristic based on bridge health monitoring system.
abstract: Through the wind velocity and direction monitoring system installed on Jiubao Bridge of Qiantang River, Hangzhou city, Zhejiang province, China, a full range of wind velocity and direction data was collected during typhoon HAIKUI in 2012. Based on these data, it was found that, at higher observed elevation, turbulence intensity is lower, and the variation tendency of longitudinal and lateral turbulence intensities with mean wind speeds is basically the same. Gust factor goes higher with increasing mean wind speed, and the change rate obviously decreases as wind speed goes down and an inconspicuous increase occurs when wind speed is high. The change of peak factor is inconspicuous with increasing time and mean wind speed. The probability density function (PDF) of fluctuating wind speed follows Gaussian distribution. Turbulence integral scale increases with mean wind speed, and its PDF does not follow Gaussian distribution. The power spectrum of observation fluctuating velocity is in accordance with Von Karman spectrum.
authors.affiliation: State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
authors.affiliation: Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China.
authors.forename: Dezhang
authors.initials: D
authors.lastname: Sun
authors.affiliation: Bureau of Public Works of Shenzhen Municipality, Shenzhen 518006, China.
authors.forename: Yinqiang
authors.initials: Y
authors.lastname: Wu
mesh_terms: D055867:Cyclonic Storms; D008962:Models, Theoretical; D055883:Structure Collapse