Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method
To investigate the time-varying dynamic characteristics of concrete dams under the excitation of large earthquakes for online structural health monitoring and damage evaluation, an online modal identification procedure based on strong-motion records is proposed. The online modal identification of co...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/7513261 |
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| _version_ | 1832558852966449152 |
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| author | Lin Cheng Fei Tong Jie Yang Dongjian Zheng |
| author_facet | Lin Cheng Fei Tong Jie Yang Dongjian Zheng |
| author_sort | Lin Cheng |
| collection | DOAJ |
| description | To investigate the time-varying dynamic characteristics of concrete dams under the excitation of large earthquakes for online structural health monitoring and damage evaluation, an online modal identification procedure based on strong-motion records is proposed. The online modal identification of concrete dams is expressed as a subspace tracking problem, and a newly developed recursive stochastic subspace identification (RSSI) method based on the generalized yet another subspace tracker (GYAST) algorithm, which exploits both the accuracy of the subspace identification and fast computational capability, is used to extract the time-varying modal parameters of concrete dams during earthquakes. With the simulated vibration response records, a numerical example is used to verify the accuracy, robustness, and efficiency of the proposed GYAST-based, time-varying modal identification method. Then, the realistic strong-motion records of the Pacoima arch dam are analysed using the proposed modal identification procedure, and the time-varying characteristics of the concrete arch dam during three different earthquakes are analysed. |
| format | Article |
| id | doaj-art-3eb5edc2804245678285ee2a1b73a5a5 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-3eb5edc2804245678285ee2a1b73a5a52025-02-03T01:31:22ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/75132617513261Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based MethodLin Cheng0Fei Tong1Jie Yang2Dongjian Zheng3State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, ChinaTo investigate the time-varying dynamic characteristics of concrete dams under the excitation of large earthquakes for online structural health monitoring and damage evaluation, an online modal identification procedure based on strong-motion records is proposed. The online modal identification of concrete dams is expressed as a subspace tracking problem, and a newly developed recursive stochastic subspace identification (RSSI) method based on the generalized yet another subspace tracker (GYAST) algorithm, which exploits both the accuracy of the subspace identification and fast computational capability, is used to extract the time-varying modal parameters of concrete dams during earthquakes. With the simulated vibration response records, a numerical example is used to verify the accuracy, robustness, and efficiency of the proposed GYAST-based, time-varying modal identification method. Then, the realistic strong-motion records of the Pacoima arch dam are analysed using the proposed modal identification procedure, and the time-varying characteristics of the concrete arch dam during three different earthquakes are analysed.http://dx.doi.org/10.1155/2019/7513261 |
| spellingShingle | Lin Cheng Fei Tong Jie Yang Dongjian Zheng Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method Shock and Vibration |
| title | Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method |
| title_full | Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method |
| title_fullStr | Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method |
| title_full_unstemmed | Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method |
| title_short | Online Modal Identification of Concrete Dams Using the Subspace Tracking-Based Method |
| title_sort | online modal identification of concrete dams using the subspace tracking based method |
| url | http://dx.doi.org/10.1155/2019/7513261 |
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