Taking a certain long-span arch bridge as the example

this article calculated and compared the seismic responses of the arch bridge under three kinds of traveling wave excitation.Then the arch foot traveling wave excitation was proposed as a simplified input model.According to the symmetrical structure

a simplification computational method was proposed for seismic response analysis of arch bridge in time domain.The time history analysis results indicated that the simplified model can achieve good precision.This method can turn the complex problem of seismic response of the arch bridge under multiple-support excitation into the problem of seismic response under simple support which most of the engineering technologist are familiar with.