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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Application of modal-based damage-detection method to locate and evaluate damage in timber beams

Journal of Wood Science volume 53, pages 394–400 (2007)Cite this article

Abstract

Modal-based damage-detection algorithms were used to identify the location of defects commonly found in timber and to estimate their severities. In this study, the authors propose modifications to an existing damage-detection algorithm for locating and evaluating damage by comparing the modal strain energy before and after damage using the first two flexural modes of vibration. Experimental verification was performed on pin-pin supported timber beams by employing the algorithms with extracted modal parameters using experimental modal analysis. Single and multiple cases of damage used to simulate pocket(s) of rot with various severities were inflicted by removing sections of timber beam specimens. The proposed damage indicator, computed from the first two flexural modes, was capable of detecting all damage locations. It was also able to estimate, with reasonable accuracy, the severity of damage in term of loss of sectional moment of inertia. The modified damage index method is generally reliable in detecting the location and estimating the severity of simulated defects in timber beams.

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Authors and Affiliations

  1. Center for Built Infrastructure Research, Faculty of Engineering, University of Technology Sydney, PO Box 123 Broadway, NSW, 2007, Australia

    Fook Choon Choi, Jianchun Li, Bijan Samali & Keith Crews

Authors
  1. Fook Choon Choi
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  2. Jianchun Li
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  3. Bijan Samali
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  4. Keith Crews
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Correspondence to Bijan Samali.

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Choi, F.C., Li, J., Samali, B. et al. Application of modal-based damage-detection method to locate and evaluate damage in timber beams. J Wood Sci 53, 394–400 (2007). https://doi.org/10.1007/s10086-006-0881-5

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  • DOI: https://doi.org/10.1007/s10086-006-0881-5

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