The seismic response solutions of 1-D soil layered model based on rigid and elastic base boundary are derived respectively at first in this paper.According to the theoretical analysis

it is put forward that the rigid base boundary should be applied

when the vertical borehole array records are directly used as the incident waves for soil layer seismic response analysis.Then a 1-D soil layer model is designed.The seismic responses of this model with elastic base are obtained by using two general programs of DEEPSOIL and LSSRLI-1

and the consistency and reliability of these two programs are verified by the comparisons of their calculation results.Then the seismic motion of one depth is extracted as the input wave to a soil model matched this depth and using rigid base boundary.The seismic responses of this model are simulated by DEEPSOIL program

and the results coincide exactly with the above ones

which demonstrates that when the borehole array records are directly used in soil seismic response analysis

the rigid base boundary should be applied at the bottom of the soil model.This is helpful to appropriate use of borehole array records in soil seismic response analysis.