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    Substructural Damage Detection With Incomplete Information of the Structure

    Access Status
    Fulltext not available
    Authors
    Li, Jun
    Law, S.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, J. and Law, S. 2012. Substructural Damage Detection With Incomplete Information of the Structure. Journal of Applied Mechanics. 79 (4): Article ID 041003.
    Source Title
    JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
    DOI
    10.1115/1.4005552
    ISSN
    0021-8936
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/26846
    Collection
    • Curtin Research Publications
    Abstract

    This paper proposes a substructural damage identification approach without the information of responses and forces at the interface degrees-of-freedom. It is based on the response reconstruction technique using the unit impulse response function in the wavelet domain. The finite element model of the target substructure and acceleration measurement data from the damaged substructure are required in the identification. A dynamic response sensitivity-based method is used for the substructural finite element model updating, and local damage is identified as a change in the elemental stiffness factors. The adaptive Tikhonov regularization technique is adopted to improve the identification results with the measurement noise effect. Numerical studies on a three-dimensional box-section girder are conducted to validate the proposed method of substructural damage identification. The simulated damage can be identified effectively even with 10% noise in the measurements and a 5% coefficient of variation in the elastic modulus of material of the structure.

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