Identification of the Dynamic Parameters of a Real Bridge under Different Damage Conditions in a Field Experiment

Patrick J. McGetrick, Kai-Chun Chang, Chul-Woo Kim

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    This paper presents the results of a real bridge field experiment in which damage was applied artificially to a steel truss bridge. The aim of this paper is to identify the dynamic parameters of this bridge using conventional techniques and investigate the effect of various damage conditions on those parameters. In the field experiment, acceleration measurements were recorded at a number of locations on the bridge deck. To excite the bridge, a two-axle van was driven across the bridge at constant speed. Dynamic parameters, such as the bridge mode shape, natural frequency and damping constant, are identified from the acceleration signals using existing techniques such as the fast Fourier transform, logarithmic decrement and frequency domain decomposition. The variation of these parameters under the influence of artificially applied damage conditions is investigated in order to evaluate their sensitivity to the bridge damage.
    Original languageEnglish
    Title of host publicationProceedings of the 15th Asia Pacific Vibration Conference, APVC 2013
    Number of pages6
    Publication statusPublished - Jun 2013
    Event15th Asia Pacific Vibration Conference (APVC 2013) - Jeju, Korea, Republic of
    Duration: 02 Jun 201306 Jun 2013


    Conference15th Asia Pacific Vibration Conference (APVC 2013)
    Abbreviated titleAPVC 2013
    Country/TerritoryKorea, Republic of


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