The reasonably structured isolation system can decrease the ground motion input and response. To apply the isolation system to railway bridges, there is a problem of its interaction with track structure, or clarification of the dynamic constraining force by the track structure. Shaking table tests were implemented with a part of a slab track structure and an examination model of an isolation structure. The effects of track structure on the seismic behavior of the isolation system bridge were studied by nonlinear dynamic response analyses. As a result, it was confirmed that the constraining force of the track structure was able to decrease the seismic response of isolation system bridges.

Copyright (c) 2005 Railway Technical Research Institute