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Title |
Damage Evaluation of a Structure Using Continuous Wavelet Transform
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Keywords |
연속웨이블렛 변환 ; 손상평가 Continuous wavelet transform(CWT) ; Damage evaluation |
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Abstract |
The damage evaluation method for framed structures using continuous wavelet transform (CWT) is proposed. CWT is applied to the response acceleration of a structure subjected to earthquake load to decompose the response acceleration corresponding to each scale, then the normalized energy value for each scale is calculated. The difference between the normalized energy curvature (NEC) in each node before and after damage indicates a damaged element, which makes it possible to assess the soundness of structural elements. As damage becomes more severe the difference in normalized energy curvature becomes larger. The NEC calculated from the signal corresponding to high scale in CWT analysis is found to be a good index that shows the location and severity of damage.
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