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    Simulation and Measurement of Human-Induced Vibrations of the Beijing Olympic Watchtower with Tuned Mass Dampers

    Source: Journal of Performance of Constructed Facilities:;2017:;Volume ( 031 ):;issue: 006
    Author:
    Zhiqiang Zhang
    ,
    Tong Guo
    ,
    Kang Yang
    ,
    Fei Ma
    ,
    Aiqun Li
    DOI: 10.1061/(ASCE)CF.1943-5509.0001089
    Publisher: American Society of Civil Engineers
    Abstract: The Beijing Olympic Watchtower (BOW) is a landmark building with irregular shape and complex structural configuration; however, excessive human-induced vibrations of the sightseeing platform may occur during service, resulting in discomfort or panic of sightseers. Therefore, tuned mass dampers (TMDs) were designed to control the maximum acceleration under human activities. This paper presents the finite-element (FE) simulation of the vibrations under different human densities and moving frequencies. Field vibration tests on the fifth sightseeing platform of the BOW were further conducted to study the dynamic behavior of the platform and to validate the effectiveness of TMDs. The tests consisted of two free vibration modal tests (before and after the construction of the floor surface layer) and tests to measure the dynamic responses with controlled crowd moving. It is observed that prior to the use of TMDs, the accelerations significantly exceeded the threshold value, and there was lateral torsional vibration of the platform; resonance occurred as the crowd moved at 2.5 Hz, resulting in significant human discomfort. After the installation of TMDs, the human-induced responses were significantly mitigated, although due to the absence of a floor surface layer during the field measurement, there were some differences between the designed and measured modal frequencies, and the TMDs may not have fully reached their capacity.
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      Simulation and Measurement of Human-Induced Vibrations of the Beijing Olympic Watchtower with Tuned Mass Dampers

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4241380
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    contributor authorZhiqiang Zhang
    contributor authorTong Guo
    contributor authorKang Yang
    contributor authorFei Ma
    contributor authorAiqun Li
    date accessioned2017-12-16T09:19:04Z
    date available2017-12-16T09:19:04Z
    date issued2017
    identifier other%28ASCE%29CF.1943-5509.0001089.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4241380
    description abstractThe Beijing Olympic Watchtower (BOW) is a landmark building with irregular shape and complex structural configuration; however, excessive human-induced vibrations of the sightseeing platform may occur during service, resulting in discomfort or panic of sightseers. Therefore, tuned mass dampers (TMDs) were designed to control the maximum acceleration under human activities. This paper presents the finite-element (FE) simulation of the vibrations under different human densities and moving frequencies. Field vibration tests on the fifth sightseeing platform of the BOW were further conducted to study the dynamic behavior of the platform and to validate the effectiveness of TMDs. The tests consisted of two free vibration modal tests (before and after the construction of the floor surface layer) and tests to measure the dynamic responses with controlled crowd moving. It is observed that prior to the use of TMDs, the accelerations significantly exceeded the threshold value, and there was lateral torsional vibration of the platform; resonance occurred as the crowd moved at 2.5 Hz, resulting in significant human discomfort. After the installation of TMDs, the human-induced responses were significantly mitigated, although due to the absence of a floor surface layer during the field measurement, there were some differences between the designed and measured modal frequencies, and the TMDs may not have fully reached their capacity.
    publisherAmerican Society of Civil Engineers
    titleSimulation and Measurement of Human-Induced Vibrations of the Beijing Olympic Watchtower with Tuned Mass Dampers
    typeJournal Paper
    journal volume31
    journal issue6
    journal titleJournal of Performance of Constructed Facilities
    identifier doi10.1061/(ASCE)CF.1943-5509.0001089
    treeJournal of Performance of Constructed Facilities:;2017:;Volume ( 031 ):;issue: 006
    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
    yabeshDSpacePersian