Seismic Fragility Analysis of Landscape-Covered Bridge with Consideration of the Bridge–Building Interaction

Abstract

The seismic fragility analysis of a three-span landscape-covered bridge with a continuous rigid frame and a reinforced concrete frame structure is performed using traditional reliability theory. To assess the effect of the upper building structures on the bridge, nonlinear dynamic transient analysis is performed based on the spatial finite element model of the structure. The damage indexes of the pier and the bearing are defined based on the displacement failure criterion. Considering the uncertainties of ground motion and structure material, the fragility curves of piers and bearings are obtained by taking the peak ground acceleration (