Abstract
It is in fact difficult to construct all bridges so as not to cross the inland active fault because a lot of inland active faults exist in Japan. In this study, the relation between fault displacement in the direction of the bridge axis and the damage of the bridge has been examined using static analysis with displacement control method for the PC rigid frame bridge with center span of 100m. Here, two cases have been assumed for the boundary conditions of analytical model of the PC rigid frame bridge, one is with the spread foundation being fixed, the other is to consider the nonlinear behavior between the spread foundation and soil. By the analytical results of these two cases, comparative study has been carried out about the influence of the foundation size on the damage of the bridge caused by fault displacement.
