Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete Bridge
In vibration-based damage detection, changes to structural modal properties are tracked over time in order to infer the current state of damage or deterioration. As such, the ability to obtain reliable estimates of modal parameters, particularly natural frequencies and mode shapes, is of critical im...
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| Format: | Article |
| Language: | English |
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Wiley
2009-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2009/859217 |
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| _version_ | 1832548500580073472 |
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| author | M. Alwash B. F. Sparling L. D. Wegner |
| author_facet | M. Alwash B. F. Sparling L. D. Wegner |
| author_sort | M. Alwash |
| collection | DOAJ |
| description | In vibration-based damage detection, changes to structural modal properties are tracked over time in order to infer the current state of damage or deterioration. As such, the ability to obtain reliable estimates of modal parameters, particularly natural frequencies and mode shapes, is of critical importance. In the present study, the influence of the dynamic excitation source on the accuracy and statistical uncertainty of modal property estimates for a three span reinforced concrete bridge was investigated experimentally and numerically. Comparisons were made between the dynamic responses due to vehicle loading, harmonic and random forcing, impact, and environmental excitation. It was demonstrated that natural frequencies and mode shapes extracted from the free vibration response following vehicle and random loading events were of higher quality than corresponding values determined during the forcing phase of those events. Harmonic excitation at resonant frequencies and impact were also found to produce statistically reliable results. |
| format | Article |
| id | doaj-art-e5865a4ac4de4f70bc0ca4293adac0d4 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2009-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-e5865a4ac4de4f70bc0ca4293adac0d42025-02-03T06:13:59ZengWileyAdvances in Civil Engineering1687-80861687-80942009-01-01200910.1155/2009/859217859217Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete BridgeM. Alwash0B. F. Sparling1L. D. Wegner2Department of Civil and Geological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9, CanadaDepartment of Civil and Geological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9, CanadaDepartment of Civil and Geological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK, S7N 5A9, CanadaIn vibration-based damage detection, changes to structural modal properties are tracked over time in order to infer the current state of damage or deterioration. As such, the ability to obtain reliable estimates of modal parameters, particularly natural frequencies and mode shapes, is of critical importance. In the present study, the influence of the dynamic excitation source on the accuracy and statistical uncertainty of modal property estimates for a three span reinforced concrete bridge was investigated experimentally and numerically. Comparisons were made between the dynamic responses due to vehicle loading, harmonic and random forcing, impact, and environmental excitation. It was demonstrated that natural frequencies and mode shapes extracted from the free vibration response following vehicle and random loading events were of higher quality than corresponding values determined during the forcing phase of those events. Harmonic excitation at resonant frequencies and impact were also found to produce statistically reliable results.http://dx.doi.org/10.1155/2009/859217 |
| spellingShingle | M. Alwash B. F. Sparling L. D. Wegner Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete Bridge Advances in Civil Engineering |
| title | Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete Bridge |
| title_full | Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete Bridge |
| title_fullStr | Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete Bridge |
| title_full_unstemmed | Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete Bridge |
| title_short | Influence of Excitation on Dynamic System Identification for a Multi-Span Reinforced Concrete Bridge |
| title_sort | influence of excitation on dynamic system identification for a multi span reinforced concrete bridge |
| url | http://dx.doi.org/10.1155/2009/859217 |
| work_keys_str_mv | AT malwash influenceofexcitationondynamicsystemidentificationforamultispanreinforcedconcretebridge AT bfsparling influenceofexcitationondynamicsystemidentificationforamultispanreinforcedconcretebridge AT ldwegner influenceofexcitationondynamicsystemidentificationforamultispanreinforcedconcretebridge |