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    Experimental and Numerical Study on the Aerodynamic Admittance of Twin-Box Bridge Decks in Sinusoidal Gusts and Continuous Turbulence

    Source: Journal of Bridge Engineering:;2023:;Volume ( 028 ):;issue: 011::page 04023078-1
    Author:
    Weilin Li
    ,
    L. Patruno
    ,
    Huawei Niu
    ,
    Yonghui An
    ,
    Xugang Hua
    DOI: 10.1061/JBENF2.BEENG-6198
    Publisher: ASCE
    Abstract: Aerodynamic admittance functions (AAFs) of twin-box decks are particularly complex due to the presence of a central gap, so require the performance of dedicated studies to determine them. Two main approaches are available for this purpose, which consist of studying the aerodynamic forces produced by the section when impinged by sinusoidal gusts or continuous turbulence, respectively. However, owing to the difficulty in the generation of large-scale turbulence in traditional wind tunnel tests, the two aforementioned approaches often provide remarkably different results. To address this problem, this study aims to systematically investigate the admittance function of twin-box decks by comparing three approaches: active wind tunnel tests, and large eddy simulations (LESs) using both sinusoidal gusts and continuous synthetic turbulence. In particular, wind tunnel tests equipped with an active gust generator are conducted to generate a series of single-frequency vertical sinusoidal gusts. The effects of gust amplitudes and gap widths on the AAFs are experimentally investigated. In addition, LESs are performed aiming to provide valuable insights regarding the discrepancy between AAFs obtained in the two inflow conditions. Results obtained adopting all the aforementioned methodologies are compared, showing good agreement among the three approaches and values sometimes higher than the Sears function. It is also shown that buffeting forces are mainly produced by the upstream deck, so explaining the good agreement obtained between sinusoidal gust and continuous turbulent inflows.
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      Experimental and Numerical Study on the Aerodynamic Admittance of Twin-Box Bridge Decks in Sinusoidal Gusts and Continuous Turbulence

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4293343
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    contributor authorWeilin Li
    contributor authorL. Patruno
    contributor authorHuawei Niu
    contributor authorYonghui An
    contributor authorXugang Hua
    date accessioned2023-11-27T23:09:40Z
    date available2023-11-27T23:09:40Z
    date issued11/1/2023 12:00:00 AM
    date issued2023-11-01
    identifier otherJBENF2.BEENG-6198.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4293343
    description abstractAerodynamic admittance functions (AAFs) of twin-box decks are particularly complex due to the presence of a central gap, so require the performance of dedicated studies to determine them. Two main approaches are available for this purpose, which consist of studying the aerodynamic forces produced by the section when impinged by sinusoidal gusts or continuous turbulence, respectively. However, owing to the difficulty in the generation of large-scale turbulence in traditional wind tunnel tests, the two aforementioned approaches often provide remarkably different results. To address this problem, this study aims to systematically investigate the admittance function of twin-box decks by comparing three approaches: active wind tunnel tests, and large eddy simulations (LESs) using both sinusoidal gusts and continuous synthetic turbulence. In particular, wind tunnel tests equipped with an active gust generator are conducted to generate a series of single-frequency vertical sinusoidal gusts. The effects of gust amplitudes and gap widths on the AAFs are experimentally investigated. In addition, LESs are performed aiming to provide valuable insights regarding the discrepancy between AAFs obtained in the two inflow conditions. Results obtained adopting all the aforementioned methodologies are compared, showing good agreement among the three approaches and values sometimes higher than the Sears function. It is also shown that buffeting forces are mainly produced by the upstream deck, so explaining the good agreement obtained between sinusoidal gust and continuous turbulent inflows.
    publisherASCE
    titleExperimental and Numerical Study on the Aerodynamic Admittance of Twin-Box Bridge Decks in Sinusoidal Gusts and Continuous Turbulence
    typeJournal Article
    journal volume28
    journal issue11
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/JBENF2.BEENG-6198
    journal fristpage04023078-1
    journal lastpage04023078-15
    page15
    treeJournal of Bridge Engineering:;2023:;Volume ( 028 ):;issue: 011
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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