Based on large-scale shaking table tests

using the pre-processed peak ground acceleration(PGA) and its amplification factor

taking slopes with two types of lithology variations including high strength materials overlying low strength materials and low strength materials overlying high strength materials as the research objects

this paper investigates systematically the change laws of the horizontal and vertical accelerations in different slope levels with the gradual increasing intensity

under sine waves and crude seismic waves. Analysis shows that: ① When crude seismic waves are loaded

the PGAs in two directions both increased as input waves strengthened

while their corresponding amplification factors increased first

then gradually decreased into stability change. ② When sine waves are loaded

the PGAs in two directions also increased as input waves strengthened

however

their corresponding amplification factors still increased slowly all the time

which indicates the weaker nonlinearity. ③ Under the horizontal and vertical seismic action of the same magnitude

the acceleration amplification appears respectively in the upper part and in the lower part of the two slope models. In addition

several extremum zones of accelerations appear at the bottom

middle and top of slope models. ④ Under the horizontal seismic action

the effect of low frequency is stronger than that of high frequency

furthermore

with the same seismic wave

the acceleration responses in slope with high strength materials overlying low strength materials are stronger than those in the other slope; while under the vertical seismic action of the same magnitude

the results are contrary. The research provides a guidance and reference to quakeproof and post-disaster reconstruction in the high seismic hazard zones.