In general

the seismic response analysis in earthquake engineering assumes that the vibration parameters at the interface between the target and the external media are exactly the same

that is

single point input.However

the seismic wave energy

amplitude attenuation and scattering phenomenon exist during seismic wave propagation

so the movements at different input points of the interface are not completely consistent.The single point input method in large scale has some deviation comparing with the reality.Thus

researches on multi point input are needed to cope with this condition.Taking a 2 Dsoil slope model as an example

results between single input and multi input were compared.The similarities and differences of the seismic response of soil layer

plastic zone and safety factor between the two methods were analyzed in detail.Suggestions were put forward for reference in seismic design of slope.The results show that

in the aspect of soil seismic response analysis

the peak acceleration and velocity responses of multi-point input are both larger than those of single point input at the same monitoring point.The time to reach peak value is also shorter.A more obvious tensile-shear failure phenomenon was found for multi-point input according to plastic zone analysis.The factor of safety obtained by multi-point input is about 7% larger than that of single point input at each time.As mentioned above

seismic response analysis of slope considering multi-point input is more reasonable and practical in large scale.Therefore

multi-point input should be considered in earthquake resistance design.