To analyze the influence of seismic characteristics on the pounding responses of isolated continuous girder bridges

the finite element program ABAQUS is used to build an analytical model for a three-span concrete bridge as an example

which considers the concrete damage plasticity（CDP）and the spatial arbitrary pounding.First

twelve typical seismic waves are used in the analysis to investigate the effect of the ratio of peak ground acceleration to peak ground velocity（PGA/PGV）on the simulated results.The maximum displacement of the girder with no pounding effect

the pounding times

and maximum pounding force with pounding effect are derived.Then

a typical ground motion is chosen to analyze the effect of PGA on the pounding response.The simulated results indicate that the maximum pounding forces and pounding times vary insignificantly with PGA/PGV

though the maximum displacement of the deck increases with the reduction of PGA/PGV when the pounding effect is ignored.With different lengths of the joint expansion

the maximum pounding force may increase linearly with PGA

or it may fluctuate with PGA.