Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement
The load distribution to each mode of a structure under seismic loading depends on the modal participation factors and mode shapes and thus the exact estimation of modal participation factors and mode shapes is essential to analyze the seismic response of a structure. In this study, an identificatio...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2015/627852 |
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| _version_ | 1849309302763814912 |
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| author | Jae-Seung Hwang Hongjin Kim Bong-Ho Cho |
| author_facet | Jae-Seung Hwang Hongjin Kim Bong-Ho Cho |
| author_sort | Jae-Seung Hwang |
| collection | DOAJ |
| description | The load distribution to each mode of a structure under seismic loading depends on the modal participation factors and mode shapes and thus the exact estimation of modal participation factors and mode shapes is essential to analyze the seismic response of a structure. In this study, an identification procedure for modal participation factors and mode shapes from a vibration test is proposed. The modal participation factors and mode shapes are obtained from the relationship between observability matrices realized from the system identification. Using the observability matrices, it is possible to transform an arbitrarily identified state space model obtained from the experimental data into a state space model which is defined in a domain with physical meaning. Then, the modal participation factor can be estimated based on the transformation matrix between two state space models. The numerical simulation is performed to evaluate the proposed procedure, and the results show that the modal participation factor and mode shapes are estimated from the structural responses accurately. The procedure is also applied to the experimental data obtained from the shaking table test of a three-story shear building model. |
| format | Article |
| id | doaj-art-11875f45b7154ee0a04deb5aabfcd455 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-11875f45b7154ee0a04deb5aabfcd4552025-08-20T03:54:12ZengWileyShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/627852627852Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability MeasurementJae-Seung Hwang0Hongjin Kim1Bong-Ho Cho2School of Architecture, Chonnam National University, Gwangju 500-757, Republic of KoreaSchool of Architecture & Civil Engineering, Kyungpook National University, Daegu 702-701, Republic of KoreaSchool of Architecture, Ajou University, Gyeonggi-do 443-749, Republic of KoreaThe load distribution to each mode of a structure under seismic loading depends on the modal participation factors and mode shapes and thus the exact estimation of modal participation factors and mode shapes is essential to analyze the seismic response of a structure. In this study, an identification procedure for modal participation factors and mode shapes from a vibration test is proposed. The modal participation factors and mode shapes are obtained from the relationship between observability matrices realized from the system identification. Using the observability matrices, it is possible to transform an arbitrarily identified state space model obtained from the experimental data into a state space model which is defined in a domain with physical meaning. Then, the modal participation factor can be estimated based on the transformation matrix between two state space models. The numerical simulation is performed to evaluate the proposed procedure, and the results show that the modal participation factor and mode shapes are estimated from the structural responses accurately. The procedure is also applied to the experimental data obtained from the shaking table test of a three-story shear building model.http://dx.doi.org/10.1155/2015/627852 |
| spellingShingle | Jae-Seung Hwang Hongjin Kim Bong-Ho Cho Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement Shock and Vibration |
| title | Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement |
| title_full | Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement |
| title_fullStr | Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement |
| title_full_unstemmed | Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement |
| title_short | Modal Parameters Estimation of Building Structures from Vibration Test Data Using Observability Measurement |
| title_sort | modal parameters estimation of building structures from vibration test data using observability measurement |
| url | http://dx.doi.org/10.1155/2015/627852 |
| work_keys_str_mv | AT jaeseunghwang modalparametersestimationofbuildingstructuresfromvibrationtestdatausingobservabilitymeasurement AT hongjinkim modalparametersestimationofbuildingstructuresfromvibrationtestdatausingobservabilitymeasurement AT bonghocho modalparametersestimationofbuildingstructuresfromvibrationtestdatausingobservabilitymeasurement |