Smart Structures and Systems

  • 제1권1호
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  • Pages.29-46
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  • 2005
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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Structural damage localization using spatial wavelet packet signature

  • Chang, C.C. (Department of Civil Engineering, Hong Kong University of Science and Technology) ;
  • Sun, Z. (Department of Civil Engineering, Hong Kong University of Science and Technology)
  • 투고 : 2004.03.27
  • 심사 : 2004.12.08
  • 발행 : 2005.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, a wavelet packet based method is proposed for identifying damage occurrence and damage location for beam-like structures. This method assumes that the displacement or the acceleration response time histories at various locations along a beam-like structure both before and after damage are available for damage assessment. These responses are processed through a proper level of wavelet packet decomposition. The wavelet packet signature (WPS) that consists of wavelet packet component signal energies is calculated. The change of the WPS curvature between the baseline state and the current state is then used to identify the locations of possible damage in the structure. Two numerical studies, one on a 15-storey shear-beam building frame and another on a simply-supported steel beam, and an experimental study on a simply-supported reinforced concrete beam are performed to validate the proposed method. Results show the WPS curvature change can be used to locate both single and sparsely-distributed multiple damages that exist in the structure. Also the accuracy of assessment does not seem to be affected by the presence of 20-15dB measurement noise. One advantage of the proposed method is that it does not require any mathematical model for the structure being monitored and hence can potentially be used for practical application.

키워드

참고문헌

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피인용 문헌

  1. Performance of Vibration-Based Damage Detection Methods in Bridges vol.24, pp.1, 2009, https://doi.org/10.1111/j.1467-8667.2008.00546.x
  2. A statistical reference-free damage identification for real-time monitoring of truss bridges using wavelet-based log likelihood ratios vol.12, pp.2, 2013, https://doi.org/10.12989/sss.2013.12.2.181
  3. Two-Step Method for Instability Damage Detection in Tower Body of Transmission Structures vol.16, pp.1, 2013, https://doi.org/10.1260/1369-4332.16.1.219
  4. Structural damage assessment using output-only measurement: Localization and quantification vol.25, pp.9, 2014, https://doi.org/10.1177/1045389X13498318
  5. Integrity Assessment for Beam-Like Structures by Continuous Wavelet Transform vol.321-323, pp.1662-9795, 2006, https://doi.org/10.4028/www.scientific.net/KEM.321-323.282