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    Damage detection of shear connectors based on power spectral density transmissibility

    Access Status
    Fulltext not available
    Authors
    Li, Jun
    Hao, Hong
    Date
    2013
    Type
    Journal Article
    
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    Citation
    Li, J. and Hao, H. 2013. Damage detection of shear connectors based on power spectral density transmissibility. Key Engineering Materials. 569-570 (2013): pp. 1241-1248.
    Source Title
    Key Engineering Materials
    DOI
    10.4028/www.scientific.net/KEM.569-570.1241
    ISSN
    10139826
    URI
    http://hdl.handle.net/20.500.11937/42176
    Collection
    • Curtin Research Publications
    Abstract

    Damage of shear connectors in slab-on-girder structures will result in shear slippage between slab and girder, which significantly reduces the load-carrying capacity of the bridge. This paper proposes a dynamic damage detection approach to identify the damage of shear connectors in slab-on-girder bridges with power spectral density transmissibility (PSDT). PSDT formulates the relationship between the auto-spectral density functions of two responses. Measured impact force and acceleration responses from hammer tests are analyzed to obtain the frequency response functions at the slab and girder sensor locations by experimental modal analysis. When measurement data from the undamaged structure are available, PSDT from the slab response to the girder response is derived with the obtained frequency response functions. PSDT matrices in the undamaged and damaged states are directly compared to identify the damage of shear connectors. When the measurement data from the undamaged structure are not available, PSDT matrices from measured response at a reference sensor response to those of the slab and girder in the damaged state can also be used to detect the damage of shear connectors. Experimental studies with a concrete slab supported by two steel girders are conducted to investigate the accuracy and efficiency of the proposed approach. Identification results demonstrated that damage of shear connectors can be identified accurately and efficiently with and without measurement data from the undamaged structure.

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    • Damage assessment of shear connectors with vibration measurements and power spectral density transmissibility
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      Shear connectors are generally used to link the slab and girders together in slab-on-girder bridge structures. Damage of shear connectors in such structures will result in shear slippage between the slab and girders, which ...
    • Damage detection of shear connectors in bridge structures with transmissibility in frequency domain
      Li, Jun; Hao, Hong; Xia, Y.; Zhu, P. (2014)
      Shear connectors are generally used to link the slab and girder together in slab-on-girder bridge structures. Damage of shear connectors in such structures will result in shear slippage between the slab and girder, which ...
    • Dynamic Assessment of Shear Connectors in Composite Bridges with Ambient Vibration Measurements
      Li, Jun; Hao, Hong; Zhu, H. (2014)
      Shear connectors are normally used in composite bridges, such as slab-ongirder structures, to link the slab and girder together. Damage of shear connectors will result in shear slippage between slab and girder, which ...
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