Ambient vibration tests and analyses of a long-span rigid-frame bridge were conducted using distributed long-gauge fiber-optic sensors. The concept of a long-gauge fiber-optic sensor and its merit to reveal local and global structural features are presented. Monitoring of a long-span bridge was performed using long-gauge sensors, and a method to calculate structural deformation distribution from the measured long-gauge strains is proposed, in which shear-deformation effect is considered because the main girder of the studied bridge is deep with a length–depth ratio of 17.9 at the end of the middle span. Modal identification of the studied bridge using the measured long-gauge dynamic strains was also performed, from which strain and displacement mode shapes were identified. Those results demonstrate the superiority of long-gauge fiber-optic sensors and their successful application to the studied bridge.


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    Title :

    Vibration and Deformation Monitoring of a Long-Span Rigid-Frame Bridge with Distributed Long-Gauge Sensors


    Contributors:
    Zhang, Jian (author) / Tian, Yongding (author) / Yang, Caiqian (author) / Wu, Bitao (author) / Wu, Zhisen (author) / Wu, Gang (author) / Zhang, Xin (author) / Zhou, Liming (author)

    Published in:

    Publication date :

    2016-10-31




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown