Analysis of transient wind⁃induced response of long⁃span bridge under nonstationary wind field

被引：0
|
作者：
Feng Y. [1 ]
Hao J.-M. [1 ,2 ]
Wanf F. [1 ,2 ]
Zhang J.-P. [1 ]
Huang X.-M. [3 ]
机构：
[1] School of Highway, Chang'an University, Xi'an
[2] Wind Tunnel Laboratory, Chang'an University, Xi'an
[3] School of Transportation, Southeast University, Nanjing
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2023年 / 53卷 / 06期
关键词：
bridge engineering; buffeting; long-span bridges; nonstationary wind field; transient effects;
D O I：
10.13229/j.cnki.jdxbgxb.20221511
中图分类号：
学科分类号：
摘要：
To study the influence of transient effects of nonstationary wind field on wind-induced bridge response，the nonstationary wind field was simulated based on the Hilbert spectrum，and the wind field spatial correlation was introduced by the Cholesky decomposition. The 2-D indicial response function was applied to the nonstationary wind-induced bridge buffeting response analysis method considering the transient effects. The Hilbert spectrum was obtained from the measured data of downburst and typhoon to reappear the real downburst/typhoon wind field with high accuracy. A long-span suspension bridge was selected to implement the nonstationary buffeting response analysis，the influence of transient effects embedded in nonstationary wind field on the aerodynamics and buffeting response of the bridge was discussed. The results show that the downburst presents significant nonstationarity，and the time-varying mean wind-induced transient effects significantly modify the aerodynamics of the wind-bridge interaction system，which exerts a significant impact on the indicial response function and buffeting response of long-span bridges. However，the time-varying mean wind-induced transient effects are insignificant in typhoon case，and the influence on the aerodynamics and the buffeting response is almost negligible. © 2023 Editorial Board of Jilin University. All rights reserved.
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页码：1638 / 1649
页数：11
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