Performance evaluation of base-isolated Yama-agé bridge with high damping rubber bearings using recorded seismic data

Identification of system parameters with the help of records made on a base-isolated bridge during earthquakes, provides an excellent opportunity to study the performance of various components of such a bridge system under these loading conditions. This study utilizes a two-stage system identification methodology for identifying the modal and structural parameters of base-isolated Yama-agé bridge in Japan from multiple set of recorded seismic acceleration data. By comparing the identified and physical parameters, performance of the base-isolation system is evaluated and the effect of soil–structure interaction on the overall performance of the bridge is examined.