Damage detection of gird-slab combined bridge based on lifting wavelet entropy indexes

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (11) : 114-117.

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Damage detection of gird-slab combined bridge based on lifting wavelet entropy indexes

Sun zeng-shou1, fan ke-ju2

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Abstract

Taking advantage of characteristic of lifting wavelet and entropy, the structural damage identification method based on lifting wavelet entropy is proposed in this paper. And the lifting wavelet time entropy index and the relative lifting wavelet entropy index is established. The new method and damage indexs are verified in numerical simulation of gird-slab combined bridge. The analysis results show that lifting wavelet time entropy can identify structural damage moment and the relative lifting wavelet entropy can identify structural damage location.

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Lifting wavelet / Lifting wavelet entropy / Structural damage identification

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Sun zeng-shou;fan ke-ju. Damage detection of gird-slab combined bridge based on lifting wavelet entropy indexes[J]. Journal of Vibration and Shock, 2012, 31(11): 114-117