The use of an instrumented vehicle in a wavelet based damage detection approach for bridge structures

P. J. McGetrick, C. W. Kim

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

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    Abstract

    Periodic monitoring of structures such as bridges is necessary as their condition can deteriorate due to environmental conditions and ageing, causing the bridge to become unsafe. This monitoring - so called Structural Health Monitoring (SHM) - can give an early warning if a bridge becomes unsafe. This paper investigates an alternative wavelet-based approach for the monitoring of bridge structures which consists of the use of a vehicle fitted with accelerometers on its axles. A simplified vehicle-bridge interaction model is used in theoretical simulations to examine the effectiveness of the approach in detecting damage in the bridge. The accelerations of the vehicle are processed using a continuous wavelet transform, allowing a time-frequency analysis to be performed. This enables the identification of both the existence and location of damage from the vehicle response. Based on this analysis, a damage index is established. A parametric study is carried out to investigate the effect of parameters such as the bridge span length, vehicle speed, vehicle mass, damage level, signal noise level and road surface roughness on the accuracy of results. In addition, a laboratory experiment is carried out to validate the results of the theoretical analysis and assess the ability of the approach to detect changes in the bridge response.
    Original languageEnglish
    Title of host publicationProceedings of the Second Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, SMAR 2013
    PublisherSMAR
    Number of pages8
    Publication statusPublished - 2013
    EventSecond Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2013) - Istanbul, Turkey
    Duration: 09 Sep 201311 Sep 2013

    Conference

    ConferenceSecond Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2013)
    Abbreviated titleSMAR 2013
    Country/TerritoryTurkey
    CityIstanbul
    Period09/09/201311/09/2013

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