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Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform
Joint Authors
Wang, Gan-jun
Chen, Zhi-wei
Xie, Wei-ping
Chen, Bo
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-06-01
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
The sudden stiffness reduction in a structure may cause the signal discontinuity in the acceleration responses close to the damage location at the damage time instant.
To this end, the damage detection on sudden stiffness reduction of building structures has been actively investigated in this study.
The signal discontinuity of the structural acceleration responses of an example building is extracted based on the discrete wavelet transform.
It is proved that the variation of the first level detail coefficients of the wavelet transform at damage instant is linearly proportional to the magnitude of the stiffness reduction.
A new damage index is proposed and implemented to detect the damage time instant, location, and severity of a structure due to a sudden change of structural stiffness.
Numerical simulation using a five-story shear building under different types of excitation is carried out to assess the effectiveness and reliability of the proposed damage index for the building at different damage levels.
The sensitivity of the damage index to the intensity and frequency range of measurement noise is also investigated.
The made observations demonstrate that the proposed damage index can accurately identify the sudden damage events if the noise intensity is limited.
American Psychological Association (APA)
Chen, Bo& Chen, Zhi-wei& Wang, Gan-jun& Xie, Wei-ping. 2014. Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-16.
https://search.emarefa.net/detail/BIM-1051127
Modern Language Association (MLA)
Chen, Bo…[et al.]. Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform. The Scientific World Journal No. 2014 (2014), pp.1-16.
https://search.emarefa.net/detail/BIM-1051127
American Medical Association (AMA)
Chen, Bo& Chen, Zhi-wei& Wang, Gan-jun& Xie, Wei-ping. Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-16.
https://search.emarefa.net/detail/BIM-1051127
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1051127