Wavelet Analysis in Damage Detection for Bridge Structure

Abstract:

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The damage of structure leads to variation of structural modal parameter,so the wavelet transform for damage detection is introduced in this paper for considering the variation. First, structural dynamic response signal on the basis of the vibration-based structural damage diagnosis methods is calculated by structural analysis in the paper, then, each of sub-signals is calculated according to wavelet analysis, also, the sub-signal energy spectrum of dynamic response signal and energy spectrum variation are known. By observing the difference of the sub-signal and the variation of the sub-signal energy spectrum, we can get the variation of structural modal parameter and the sub-signal energy spectrum due to the performance degradation of the whole structure and local variations of damage level and location ,so that this method can be used in on-line damage detection for bridge structure.

Info:

Periodical:

Key Engineering Materials (Volumes 417-418)

Edited by:

M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee

Pages:

813-816

DOI:

10.4028/www.scientific.net/KEM.417-418.813

Citation:

W. B. Hu et al., "Wavelet Analysis in Damage Detection for Bridge Structure", Key Engineering Materials, Vols. 417-418, pp. 813-816, 2010

Online since:

October 2009

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Price:

$35.00

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