Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform
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....
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/807620 |
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| author | Bo Chen Zhi-wei Chen Gan-jun Wang Wei-ping Xie |
| author_facet | Bo Chen Zhi-wei Chen Gan-jun Wang Wei-ping Xie |
| author_sort | Bo Chen |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-d8cf4f92f3244d2ea86b8e803e7993c7 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-d8cf4f92f3244d2ea86b8e803e7993c72025-02-03T05:52:13ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/807620807620Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet TransformBo Chen0Zhi-wei Chen1Gan-jun Wang2Wei-ping Xie3Key Laboratory of Roadway Bridge and Structural Engineering, Wuhan University of Technology, Wuhan 430070, ChinaKey Laboratory of Roadway Bridge and Structural Engineering, Wuhan University of Technology, Wuhan 430070, ChinaZhongshan Power Supply Bureau, Guangdong 528400, ChinaKey Laboratory of Roadway Bridge and Structural Engineering, Wuhan University of Technology, Wuhan 430070, ChinaThe 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.http://dx.doi.org/10.1155/2014/807620 |
| spellingShingle | Bo Chen Zhi-wei Chen Gan-jun Wang Wei-ping Xie Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform The Scientific World Journal |
| title | Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform |
| title_full | Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform |
| title_fullStr | Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform |
| title_full_unstemmed | Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform |
| title_short | Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform |
| title_sort | damage detection on sudden stiffness reduction based on discrete wavelet transform |
| url | http://dx.doi.org/10.1155/2014/807620 |
| work_keys_str_mv | AT bochen damagedetectiononsuddenstiffnessreductionbasedondiscretewavelettransform AT zhiweichen damagedetectiononsuddenstiffnessreductionbasedondiscretewavelettransform AT ganjunwang damagedetectiononsuddenstiffnessreductionbasedondiscretewavelettransform AT weipingxie damagedetectiononsuddenstiffnessreductionbasedondiscretewavelettransform |