Damage Detection in Initially Nonlinear Structures Based on Variational Mode Decomposition
Nonlinear characteristics in the dynamic behaviors of civil structures degrade the performance of damage detection of the linear theory based traditional time- and frequency-domain methods. To overcome this challenge, this paper proposes a damage detection approach for nonlinear structures based on...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Language: | English |
| Published: |
WORLD SCIENTIFIC PUBL CO PTE LTD
2020
|
| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/FL180100196 http://hdl.handle.net/20.500.11937/91513 |
| _version_ | 1848765534892457984 |
|---|---|
| author | Xin, Y. Li, Jun Hao, Hong |
| author_facet | Xin, Y. Li, Jun Hao, Hong |
| author_sort | Xin, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Nonlinear characteristics in the dynamic behaviors of civil structures degrade the performance of damage detection of the linear theory based traditional time- and frequency-domain methods. To overcome this challenge, this paper proposes a damage detection approach for nonlinear structures based on Variational Mode Decomposition (VMD). In this approach, the measured dynamic responses from nonlinear structures under earthquake excitations are adaptively decomposed into a finite number of monocomponents by using VMD. Each decomposed mono-component represents an amplitude modulated and frequency modulated (AMFM) signal with a limited frequency bandwidth. Hilbert transform is then employed to identify the instantaneous modal parameters of the decomposed monomodes, including instantaneous frequencies and mode shapes. Based on the identified modal parameters from the decomposed structural dynamic responses, two damage indices are defined to identify the location and severity of structural damage, respectively. To validate the effectiveness and accuracy of the proposed approach, a nonlinear seven-storey shear building model with four different damage cases under earthquake excitations is used in the numerical studies. In experimental verifications, data from shake table tests on a 12-storey scaled reinforced concrete frame structure with different earthquake excitations are analyzed with the proposed approach. The results in both numerical studies and experimental validations demonstrate that the proposed approach can be successfully applied for nonlinear structural damage identification. |
| first_indexed | 2025-11-14T11:36:47Z |
| format | Journal Article |
| id | curtin-20.500.11937-91513 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:36:47Z |
| publishDate | 2020 |
| publisher | WORLD SCIENTIFIC PUBL CO PTE LTD |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-915132023-05-04T07:37:44Z Damage Detection in Initially Nonlinear Structures Based on Variational Mode Decomposition Xin, Y. Li, Jun Hao, Hong Science & Technology Technology Engineering, Civil Engineering, Mechanical Mechanics Engineering Variational mode decomposition initially nonlinear structure earthquake excitation damage identification instantaneous modal parameters damage index IDENTIFICATION TRANSFORM FREQUENCIES Nonlinear characteristics in the dynamic behaviors of civil structures degrade the performance of damage detection of the linear theory based traditional time- and frequency-domain methods. To overcome this challenge, this paper proposes a damage detection approach for nonlinear structures based on Variational Mode Decomposition (VMD). In this approach, the measured dynamic responses from nonlinear structures under earthquake excitations are adaptively decomposed into a finite number of monocomponents by using VMD. Each decomposed mono-component represents an amplitude modulated and frequency modulated (AMFM) signal with a limited frequency bandwidth. Hilbert transform is then employed to identify the instantaneous modal parameters of the decomposed monomodes, including instantaneous frequencies and mode shapes. Based on the identified modal parameters from the decomposed structural dynamic responses, two damage indices are defined to identify the location and severity of structural damage, respectively. To validate the effectiveness and accuracy of the proposed approach, a nonlinear seven-storey shear building model with four different damage cases under earthquake excitations is used in the numerical studies. In experimental verifications, data from shake table tests on a 12-storey scaled reinforced concrete frame structure with different earthquake excitations are analyzed with the proposed approach. The results in both numerical studies and experimental validations demonstrate that the proposed approach can be successfully applied for nonlinear structural damage identification. 2020 Journal Article http://hdl.handle.net/20.500.11937/91513 10.1142/S0219455420420092 English http://purl.org/au-research/grants/arc/FL180100196 WORLD SCIENTIFIC PUBL CO PTE LTD fulltext |
| spellingShingle | Science & Technology Technology Engineering, Civil Engineering, Mechanical Mechanics Engineering Variational mode decomposition initially nonlinear structure earthquake excitation damage identification instantaneous modal parameters damage index IDENTIFICATION TRANSFORM FREQUENCIES Xin, Y. Li, Jun Hao, Hong Damage Detection in Initially Nonlinear Structures Based on Variational Mode Decomposition |
| title | Damage Detection in Initially Nonlinear Structures Based on Variational Mode Decomposition |
| title_full | Damage Detection in Initially Nonlinear Structures Based on Variational Mode Decomposition |
| title_fullStr | Damage Detection in Initially Nonlinear Structures Based on Variational Mode Decomposition |
| title_full_unstemmed | Damage Detection in Initially Nonlinear Structures Based on Variational Mode Decomposition |
| title_short | Damage Detection in Initially Nonlinear Structures Based on Variational Mode Decomposition |
| title_sort | damage detection in initially nonlinear structures based on variational mode decomposition |
| topic | Science & Technology Technology Engineering, Civil Engineering, Mechanical Mechanics Engineering Variational mode decomposition initially nonlinear structure earthquake excitation damage identification instantaneous modal parameters damage index IDENTIFICATION TRANSFORM FREQUENCIES |
| url | http://purl.org/au-research/grants/arc/FL180100196 http://hdl.handle.net/20.500.11937/91513 |