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Abstract By using 2D finite element modeling (FEM) method, the interface debonding defects of bonded steel-reinforced concrete under different debonding conditions were detected by broadband excitation signals based on guided wave. Based on the FEM results, experimental investigation was carried out on the bonded steel-reinforced concrete specimens with different debonding defects. The received signals were processed by modal analysis method and wavelet packet energy spectrum method. It was found that whether the steel plate concrete interface is debonded or not can be verified by the normalized cross-correlation coefficient between the unknown component and the fully bonded specimen.The location of interface debonding can be quantitatively judged by the arrival time of the first reflection mode guided wave A0/A0 and debonding index based on model analysis method. The extent of interface debonding can be determined by wavelet packet energy spectrum analysis. This method provides theoretical and technical support for the debonding detection of steel plate-concrete interface in practical engineering.
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Received: 15 March 2022
Published: 15 June 2023
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