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- Title
Characteristics of dynamic monitoring data and observed behaviour of the Confederation Bridge due to operational load variations<sup>1</sup>.
- Authors
Londoño, Nicolás A.; Lau, David T.; Rahman, Muhammad
- Abstract
A dynamic monitoring system has been installed on the Confederation Bridge to capture ambient and triggered vibration responses of the bridge due to wind, traffic, ice, and earthquake loads. The field monitoring data and observed behaviour of the bridge provide useful information and insights for practical application of vibration based structural health monitoring techniques in actual field operating conditions. In the present study, monitoring data collected under different loading scenarios have been analyzed to better understand the variability characteristics of the field measured data and extracted dynamic properties of the bridge. Calibration of computer bridge models using the monitoring data is presented. The field measured vibration modal frequencies differ only by 2% to 4% from the calibrated computer models. Field observed vibration mode shapes and damping ratios of the bridge are also presented. The frequency contents of the bridge responses and their variability under different loading scenarios are presented.
- Subjects
BRIDGE dead loads; STRUCTURAL health monitoring; MODAL analysis; STRUCTURAL analysis (Engineering); CALIBRATION; BRIDGE construction safety
- Publication
Canadian Journal of Civil Engineering, 2013, Vol 40, Issue 5, p393
- ISSN
0315-1468
- Publication type
Article
- DOI
10.1139/cjce-2011-0370