Study on Variation Effect of Foundation Elastic Stiffness to Seismic Responses of Railway Simply Supported Beam Bridge

Considering the effect of m value on the foundation stiffness, the single-pier analysis model for finite element of railway simply supported beam bridge is established. The dynamic responses of the piers under different seismic excitations are calculated in general FEA software ANSYS by time-history method. The results indicate that the variation of vertical foundation stiffness has much influence on bridge seismic responses. The study provides the meaningful reference for anti-seismic safety design for railway simply supported bridge on hard-soil foundation.