Abstract
The dynamic behavior of the base isolated bridge with the sliding system composed of the sliding bearings and the restoring force devices is studied by using the dynamic response analysis. For the simple supported bridge model, the influences of the friction coefficient, the stiffness during sliding of the isolation system and the predominant period of the bridge are analyzed. Artificial motions for the design of bridges are used in the analysis. As the results of the analyses, the effect of these parameters on the response have been clarified. The sufficient isolation capability as well as the suppression of the excessive displacement can be achieved by selecting appropriate design parameters. One example of the analysis for the continuous bridge with the sliding isolation system is carried out. The effectiveness of the sliding type isolation system for the continuous bridges is confirmed.
