EVALUATION OF THE EFFECT OF FAULT DISPLACEMENT ON THE TYPE SELECTION OF BRIDGE CONSTRUCTED NEAR STRIKE-SLIP FAULTS

Abstract

 The location where the bridge construction is planned has a shatter zone due to past fault activity. When an earthquake occurs due to fault activity, permanent displacement of the foundation ground due to fault displacement is predicted. Bridges are required to prevent serious damage in order to maintain their functions even when fault displacement occurs. In this study, we focused on a bridge planned at a place where a fault exists in the vicinity but the location is unclear. In addition to grasping the displacement followability to fault displacement by push-over analysis, nonlinear time history response analysis was performed using input seismic ground motion including fault displacement generated based on fault information. As a result, it was clarified that a bridge type with excellent displacement followability against fault displacement is not necessarily structurally advantageous against superimposed seismic motion.