Response characteristics and seismic reinforcement methods of a steel arch bridge near the faults

Abstract

The three dimensional nonlinear earthquake response behavior of a steel arch bridge near the strike slip and thrust faults are investigated. And also, the effective seismic reinforcement methods for the steel arch bridge near the faults are proposed using the nonlinear earthquake response analyses. In these analyses, the input ground motions with permanent displacements due to the fault with the Japan Meteorological Agency Magnitude M6.5, subjected to each supports of the bridge, are simulated using the stiffness matrix method where the kinematical source model and the horizontally layered half space are assumed. The steel arch bridge is modeled as the three dimensional nonlinear frames using the Fiber Element Method.