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    Identification of Vortex-Induced Vibration on the Osman Gazi Suspension Bridge Tower and Mitigation by an Active Mass Damper

    Source: Journal of Bridge Engineering:;2025:;Volume ( 030 ):;issue: 002::page 04024108-1
    Author:
    Manabu Inoue
    ,
    Dionysius M. Siringoringo
    ,
    Yozo Fujino
    ,
    Yuji Koike
    DOI: 10.1061/JBENF2.BEENG-7131
    Publisher: American Society of Civil Engineers
    Abstract: This paper describes a study on identifying vortex-induced vibration (VIV) of the Osman Gazi Bridge tower during construction and in-service conditions and its control strategy using an active mass damper. In the wind tunnel tests conducted before bridge construction, tower VIV was identified in the first out-of-plane tower bending mode despite the presence of aerodynamic corner cuts on the tower cross section. Bridge towers are made of steel boxes with inherently low damping, resulting in a VIV amplitude exceeding the limits for the workability and safety required in the design specification. An active mass damper (AMD) was proposed to mitigate tower VIV during construction and in-service conditions. The investigations of tower aerodynamic characteristics related to VIV in wind tunnel tests, design considerations, and implementation of AMD in construction and in-service conditions are presented. Unlike active control systems on other long-span bridge towers that were removed after construction completion, the AMD systems on the Osman Gazi Bridge tower continue to function even after bridge construction completion. This makes the AMD on the Osman Gazi Bridge the world’s first application of a full active control system on a long-span bridge tower for in-service conditions. The AMD system was found effective in controlling the vibration under both conditions by providing additional damping higher than the requirement in the design specification. The robustness and effectiveness of the active control system are demonstrated in a 1-year full observation of AMD performance via a structural monitoring system. In general, the RMS of tower VIV accelerations under AMD control is lower than 15 cm/s2 or approximately 50% smaller than the corresponding accelerations without AMD control.
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      Identification of Vortex-Induced Vibration on the Osman Gazi Suspension Bridge Tower and Mitigation by an Active Mass Damper

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4304732
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    • Journal of Bridge Engineering

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    contributor authorManabu Inoue
    contributor authorDionysius M. Siringoringo
    contributor authorYozo Fujino
    contributor authorYuji Koike
    date accessioned2025-04-20T10:26:37Z
    date available2025-04-20T10:26:37Z
    date copyright11/20/2024 12:00:00 AM
    date issued2025
    identifier otherJBENF2.BEENG-7131.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4304732
    description abstractThis paper describes a study on identifying vortex-induced vibration (VIV) of the Osman Gazi Bridge tower during construction and in-service conditions and its control strategy using an active mass damper. In the wind tunnel tests conducted before bridge construction, tower VIV was identified in the first out-of-plane tower bending mode despite the presence of aerodynamic corner cuts on the tower cross section. Bridge towers are made of steel boxes with inherently low damping, resulting in a VIV amplitude exceeding the limits for the workability and safety required in the design specification. An active mass damper (AMD) was proposed to mitigate tower VIV during construction and in-service conditions. The investigations of tower aerodynamic characteristics related to VIV in wind tunnel tests, design considerations, and implementation of AMD in construction and in-service conditions are presented. Unlike active control systems on other long-span bridge towers that were removed after construction completion, the AMD systems on the Osman Gazi Bridge tower continue to function even after bridge construction completion. This makes the AMD on the Osman Gazi Bridge the world’s first application of a full active control system on a long-span bridge tower for in-service conditions. The AMD system was found effective in controlling the vibration under both conditions by providing additional damping higher than the requirement in the design specification. The robustness and effectiveness of the active control system are demonstrated in a 1-year full observation of AMD performance via a structural monitoring system. In general, the RMS of tower VIV accelerations under AMD control is lower than 15 cm/s2 or approximately 50% smaller than the corresponding accelerations without AMD control.
    publisherAmerican Society of Civil Engineers
    titleIdentification of Vortex-Induced Vibration on the Osman Gazi Suspension Bridge Tower and Mitigation by an Active Mass Damper
    typeJournal Article
    journal volume30
    journal issue2
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/JBENF2.BEENG-7131
    journal fristpage04024108-1
    journal lastpage04024108-17
    page17
    treeJournal of Bridge Engineering:;2025:;Volume ( 030 ):;issue: 002
    contenttypeFulltext
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