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    Damage detection of rc slabs using nonlinear vibration features

    Access Status
    Fulltext not available
    Authors
    Zhu, X.
    Hao, Hong
    Date
    2009
    Type
    Conference Paper
    
    Metadata
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    Citation
    Zhu, X. and Hao, H. 2009. Damage detection of rc slabs using nonlinear vibration features, pp. 687-709.
    Source Title
    International Journal of Structural Stability and Dynamics
    DOI
    10.1142/S0219455409003247
    ISSN
    0219-4554
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/29462
    Collection
    • Curtin Research Publications
    Abstract

    Studied herein are the signatures of nonlinear vibration characteristics of damaged reinforced concrete structures using the wavelet transform (WT). A two-span RC slab built in 2003 was tested to failure in the laboratory. Vibration measurements were carried out at various stages of structural damage. The vibration frequencies, mode shapes, and damping ratios at each loading stage were extracted and analyzed. It is found that the vibration frequencies are not sensitive to small damages, but are good indicators when damage is severe. The dynamic responses are also analyzed in the timefrequency domain by WT and the skeleton curve is constructed to describe the nonlinear characteristics in the reinforced concrete structures. The results show that the skeleton curves are good indicators of damage in the reinforced concrete structures because they are more sensitive to small damages than vibration frequencies. © 2009 World Scientific Publishing Company.

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