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Spectral element modeling based structure piezoelectric impedance computation and damage identification

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Abstract

This paper presents a numerical simulation study on electromechanical impedance technique for structural damage identification. The basic principle of impedance based damage detection is structural impedance will vary with the occurrence and development of structural damage, which can be measured from electromechanical admittance curves acquired from PZT patches. Therefore, structure damage can be identified from the electromechanical admittance measurements. In this study, a model based method that can identify both location and severity of structural damage through the minimization of the deviations between structural impedance curves and numerically computed response is developed. The numerical model is set up using the spectral element method, which is promised to be of high numerical efficiency and computational accuracy in the high frequency range. An optimization procedure is then formulated to estimate the property change of structural elements from the electric admittance measurement of PZT patches. A case study on a pin-pin bar is conducted to investigate the feasibility of the proposed method. The results show that the presented method can accurately identify bar damage location and severity even when the measurements are polluted by 5% noise.

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Authors and Affiliations

  1. Department of Bridge Engineering, Tongji University, Shanghai, 200092, China

    Zhigang Guo

  2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, 200092, China

    Zhi Sun

Authors
  1. Zhigang Guo
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  2. Zhi Sun
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Correspondence to Zhi Sun.

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Guo, Z., Sun, Z. Spectral element modeling based structure piezoelectric impedance computation and damage identification. Front. Archit. Civ. Eng. China 5, 458–464 (2011). https://doi.org/10.1007/s11709-011-0133-7

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  • DOI: https://doi.org/10.1007/s11709-011-0133-7

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