Abstract
System identification using Kalman filter was applied to an in-situ reinforced concrete bridge to identify its modal properties. A field vibration test was conducted to obtain vibration response data for the purpose of the identification. Using a step-by-step parameter identification technique based on modal analysis of a linear multi-degree of freedom system, the estimation of the modal parameters, which are the dominant natural frequencies and the corresponding damping ratios, was examined. The results from the system identification are presented and compared with those obtained from spectra analysis.
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