A Two-Step FE Model Updating Approach for System and Damage Identification of Prestressed Bridge Girders
This study presents a two-step FE model updating approach for health monitoring and damage identification of prestressed concrete girder bridges. To reduce the effects of modeling error in the model updating process, in the first step, modal-based model updating is used to estimate linear model para...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/2/420 |
| _version_ | 1797621920591511552 |
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| author | Niloofar Malekghaini Farid Ghahari Hamed Ebrahimian Matthew Bowers Eric Ahlberg Ertugrul Taciroglu |
| author_facet | Niloofar Malekghaini Farid Ghahari Hamed Ebrahimian Matthew Bowers Eric Ahlberg Ertugrul Taciroglu |
| author_sort | Niloofar Malekghaini |
| collection | DOAJ |
| description | This study presents a two-step FE model updating approach for health monitoring and damage identification of prestressed concrete girder bridges. To reduce the effects of modeling error in the model updating process, in the first step, modal-based model updating is used to estimate linear model parameters mainly related to the stiffness of boundary conditions and material properties. In the second step, a time-domain model updating is carried out using acceleration data to refine parameters accounting for the nonlinear response behavior of the bridge. In this step, boundary conditions are fixed at their final estimates using modal-based model updating. To prevent the convergence of updating algorithm to local solutions, the initial estimates for nonlinear material properties are selected based on the first-step model updating results. To validate the applicability of the two-step FE model updating approach, a series of forced-vibration experiments are designed and carried out on a pair of full-scale decommissioned and deteriorated prestressed bridge I-girders. In the first step, parameters related to boundary conditions, including stiffness of supports and coupling beams, as well as material properties, including initial stiffness of concrete material, are estimated. In the second step, concrete compressive strength and damping properties are updated. The final estimates of the concrete compressive strength are used to infer the extent of damage in the girders. The obtained results agree with the literature regarding the extent of reduction in concrete compressive strength in deteriorated concrete structures. |
| first_indexed | 2024-03-11T09:03:52Z |
| format | Article |
| id | doaj.art-4574db49d4a24faea67c66f57e07b459 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T09:03:52Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-4574db49d4a24faea67c66f57e07b4592023-11-16T19:32:20ZengMDPI AGBuildings2075-53092023-02-0113242010.3390/buildings13020420A Two-Step FE Model Updating Approach for System and Damage Identification of Prestressed Bridge GirdersNiloofar Malekghaini0Farid Ghahari1Hamed Ebrahimian2Matthew Bowers3Eric Ahlberg4Ertugrul Taciroglu5Department of Civil and Environmental Engineering, University of Nevada, Reno, NV 89557, USADepartment of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USADepartment of Civil and Environmental Engineering, University of Nevada, Reno, NV 89557, USASC Solutions Inc., Sunnyvale, CA 94085, USADepartment of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USADepartment of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USAThis study presents a two-step FE model updating approach for health monitoring and damage identification of prestressed concrete girder bridges. To reduce the effects of modeling error in the model updating process, in the first step, modal-based model updating is used to estimate linear model parameters mainly related to the stiffness of boundary conditions and material properties. In the second step, a time-domain model updating is carried out using acceleration data to refine parameters accounting for the nonlinear response behavior of the bridge. In this step, boundary conditions are fixed at their final estimates using modal-based model updating. To prevent the convergence of updating algorithm to local solutions, the initial estimates for nonlinear material properties are selected based on the first-step model updating results. To validate the applicability of the two-step FE model updating approach, a series of forced-vibration experiments are designed and carried out on a pair of full-scale decommissioned and deteriorated prestressed bridge I-girders. In the first step, parameters related to boundary conditions, including stiffness of supports and coupling beams, as well as material properties, including initial stiffness of concrete material, are estimated. In the second step, concrete compressive strength and damping properties are updated. The final estimates of the concrete compressive strength are used to infer the extent of damage in the girders. The obtained results agree with the literature regarding the extent of reduction in concrete compressive strength in deteriorated concrete structures.https://www.mdpi.com/2075-5309/13/2/420modal-based model updatingBayesian model updatingsystem identificationdamage identificationoperational health monitoringI-girder |
| spellingShingle | Niloofar Malekghaini Farid Ghahari Hamed Ebrahimian Matthew Bowers Eric Ahlberg Ertugrul Taciroglu A Two-Step FE Model Updating Approach for System and Damage Identification of Prestressed Bridge Girders Buildings modal-based model updating Bayesian model updating system identification damage identification operational health monitoring I-girder |
| title | A Two-Step FE Model Updating Approach for System and Damage Identification of Prestressed Bridge Girders |
| title_full | A Two-Step FE Model Updating Approach for System and Damage Identification of Prestressed Bridge Girders |
| title_fullStr | A Two-Step FE Model Updating Approach for System and Damage Identification of Prestressed Bridge Girders |
| title_full_unstemmed | A Two-Step FE Model Updating Approach for System and Damage Identification of Prestressed Bridge Girders |
| title_short | A Two-Step FE Model Updating Approach for System and Damage Identification of Prestressed Bridge Girders |
| title_sort | two step fe model updating approach for system and damage identification of prestressed bridge girders |
| topic | modal-based model updating Bayesian model updating system identification damage identification operational health monitoring I-girder |
| url | https://www.mdpi.com/2075-5309/13/2/420 |
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