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    Numerical and Experimental Investigation on Vortex-Induced Vibration Suppression of a Self-Anchored Suspension Bridge with a Central-Slotted Box Girder

    Source: Journal of Bridge Engineering:;2025:;Volume ( 030 ):;issue: 001::page 04024106-1
    Author:
    Han Xiao
    ,
    Zhiwen Liu
    ,
    Zhengqing Chen
    ,
    Renjie Qing
    ,
    Cunguo Wang
    DOI: 10.1061/JBENF2.BEENG-6959
    Publisher: American Society of Civil Engineers
    Abstract: In this study, the vortex-induced vibration (VIV) performance, mechanism, and control of a self-anchored suspension bridge with the central-slotted box girder (CSBG) under the operating wind velocity of the bridge were investigated via numerical simulations and experimental methods. First, the VIV responses and mechanism of the original CSBG at a wind angle of attack (AOA) of α = 0° were investigated by fluid–structure interaction (FSI) calculations. Then, based on the VIV responses and mechanism, the corresponding aerodynamic countermeasures were proposed to suppress the VIV of the original CSBG. Finally, the small-scale (1:50) sectional model wind tunnel tests were conducted to verify the vibration suppression effect of the aerodynamic countermeasures. Moreover, the large-scale (1:30) sectional model wind tunnel tests were conducted to further verify the vibration suppression effect of the modified CSBG with the final aerodynamic countermeasure. The results showed that the vertical VIV occurs in the original CSBG at an AOA of α = 0°, owing to the strong flow field connection between upstream and downstream box girders and vortices shedding off alternately at the tail of box girders. Moreover, for six types of closed grid plates with different BGP/BCS ratios (where BGP is the width of the closed grid plate and BCS is the width of the central slot), the flow field around the stationary CSBG showed that as BGP/BCS increases, less flow passes through the central slot, the tail vortex intensity weakens, and the fluctuating pressure coefficients become more stable. The 3.5-m-wide closed grid plate (BGP/BCS = 63.6%) at the central slot 0.5 m away from one side of the box girder was selected as the aerodynamic countermeasure, and the results of the FSI calculation showed that the vertical VIV of the original CSBG can be suppressed after taking the aerodynamic countermeasure. The results of the small-scale and large-scale sectional model wind tunnel tests verified the vibration suppression effect of the 3.5-m-wide closed grid plate. However, there were discrepancies in VIV responses between the small- and large-scale tests, especially for torsional VIV at an AOA of α = −5° to +3°. This study verified the potential of the computational fluid dynamics method to advance the VIV suppression of the bridge girder before conducting the wind tunnel tests.
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      Numerical and Experimental Investigation on Vortex-Induced Vibration Suppression of a Self-Anchored Suspension Bridge with a Central-Slotted Box Girder

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4305021
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    contributor authorHan Xiao
    contributor authorZhiwen Liu
    contributor authorZhengqing Chen
    contributor authorRenjie Qing
    contributor authorCunguo Wang
    date accessioned2025-04-20T10:35:39Z
    date available2025-04-20T10:35:39Z
    date copyright11/6/2024 12:00:00 AM
    date issued2025
    identifier otherJBENF2.BEENG-6959.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4305021
    description abstractIn this study, the vortex-induced vibration (VIV) performance, mechanism, and control of a self-anchored suspension bridge with the central-slotted box girder (CSBG) under the operating wind velocity of the bridge were investigated via numerical simulations and experimental methods. First, the VIV responses and mechanism of the original CSBG at a wind angle of attack (AOA) of α = 0° were investigated by fluid–structure interaction (FSI) calculations. Then, based on the VIV responses and mechanism, the corresponding aerodynamic countermeasures were proposed to suppress the VIV of the original CSBG. Finally, the small-scale (1:50) sectional model wind tunnel tests were conducted to verify the vibration suppression effect of the aerodynamic countermeasures. Moreover, the large-scale (1:30) sectional model wind tunnel tests were conducted to further verify the vibration suppression effect of the modified CSBG with the final aerodynamic countermeasure. The results showed that the vertical VIV occurs in the original CSBG at an AOA of α = 0°, owing to the strong flow field connection between upstream and downstream box girders and vortices shedding off alternately at the tail of box girders. Moreover, for six types of closed grid plates with different BGP/BCS ratios (where BGP is the width of the closed grid plate and BCS is the width of the central slot), the flow field around the stationary CSBG showed that as BGP/BCS increases, less flow passes through the central slot, the tail vortex intensity weakens, and the fluctuating pressure coefficients become more stable. The 3.5-m-wide closed grid plate (BGP/BCS = 63.6%) at the central slot 0.5 m away from one side of the box girder was selected as the aerodynamic countermeasure, and the results of the FSI calculation showed that the vertical VIV of the original CSBG can be suppressed after taking the aerodynamic countermeasure. The results of the small-scale and large-scale sectional model wind tunnel tests verified the vibration suppression effect of the 3.5-m-wide closed grid plate. However, there were discrepancies in VIV responses between the small- and large-scale tests, especially for torsional VIV at an AOA of α = −5° to +3°. This study verified the potential of the computational fluid dynamics method to advance the VIV suppression of the bridge girder before conducting the wind tunnel tests.
    publisherAmerican Society of Civil Engineers
    titleNumerical and Experimental Investigation on Vortex-Induced Vibration Suppression of a Self-Anchored Suspension Bridge with a Central-Slotted Box Girder
    typeJournal Article
    journal volume30
    journal issue1
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/JBENF2.BEENG-6959
    journal fristpage04024106-1
    journal lastpage04024106-19
    page19
    treeJournal of Bridge Engineering:;2025:;Volume ( 030 ):;issue: 001
    contenttypeFulltext
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