Influence of rate-dependent properties of material on the spatial effects of seismic motion of bridge

Based on the finite element analysis software ABAQUS, a model of a reinforced concrete bridge is built. Using the time-history analysis method, the effects of the material strain rate on the spatial seismic response of the bridge are studied. The displacement time-history curves of the pier top and the shear force time-history curves of the pier base are plotted, and the dynamic responses of the bridge under consistent excitation and multi-support excitation are compared. The results indicate that when only the effects of material strain rate are considered, the displacement of the pier top is reduced and the shear force of the pier base is increased. When only the spatial effects of earthquake motion are considered, both the displacement value of the pier top and the shear force of the pier base are amplified. However, the strain rate effects of materials weaken the impact of seismic spatial effects on the pier displacement of the bridge to a certain degree.