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dc.contributorDepartment of Civil and Environmental Engineering-
dc.creatorLaw, SS-
dc.creatorLi, J-
dc.publisherDepartment of Civil and Structural Engineering and Department of Mechanical Engineering, The Hong Kong Polytechnic University.en_US
dc.rightsCopyright ©2011 Department of Civil and Structural Engineering and Department of Mechanical Engineering, Hong Kong Polytechnic University .en_US
dc.rightsPosted with permission of the publisheren_US
dc.subjectDamage identificationen_US
dc.subjectResponse reconstructionen_US
dc.subjectUnit impulse response functionen_US
dc.subjectMoving loadsen_US
dc.titleDamage detection in a bridge structure under traffic loadsen_US
dc.typeConference Paperen_US
dc.description.otherinformationAuthor name used in this publication: S. S. Lawen_US
dcterms.abstractThis paper proposes a damage detection approach for a structure under moving vehicular loads. The dynamic response reconstruction technique in the wavelet domain is extended in the scenario where a structure is subject to moving vehicular loads. The transmissibility matrix between two sets of response vectors of the structure is formulated using the unit impulse response function in the wavelet domain with the moving loads at different locations. Measured acceleration responses from the structure in the damaged state are used for the identification and the damage detection procedure is conducted without the knowledge of the time-histories of the moving loads and properties of the moving vehicle. A dynamic response sensitivity-based method is used for the structural damage identification and the adaptive Tikhonov regularization technique is adopted to improve the identification results when noise effect is included in the measurements. Numerical studies on a three-dimensional box-section girder subject to a two-axle three-dimensional vehicle are conducted to validate the proposed approach of damage identification of a structure under moving loads. The simulated damage can be effectively identified even with 10% noise in the measurements.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationDynamics for sustainable engineering : proceedings of the 14th Asia-Pacific Vibration Conference, 5-8 December 2011, Hong Kong, v. 1, p. 103-112-
dc.description.oaVersion of Recorden_US
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