According to the unique dynamic vulnerability of high and steep loess slope and the typical building distribution characteristics in loess area

taking the safety distance of building to high and steep loess slope under the dynamic loading as the research target

by using the shaking table model test

the dynamic response and failure characteristics of the buildings on top and foot of the loess slope are discussed through magnifying the seismic wave amplitude gradually.The test results show that

under the action of earthquakes

the dynamic response of the upper building is far greater than that at the bottom.After landslide

the top buildings have a risk of overturning to the slope side

and the landslide deposit piles up to the 4 th layer of the foot buildings.The failure mode of top buildings foundation is"asymmetric tension shear failure".The acceleration response has an amplification effect along the height of the building

and the amplification effect is more obvious with the increase of seismic acceleration amplitude.Under the interaction of soil and building structure

the length of vertical crack in the head of the slope can reach up to50 cm

comparing to 25 min the practical loess slope.The test showed that

considering a high and steep loess slope with a height of 55 mand a slope angle of 70 degree

the safe distance for multi-storey buildings on top of the loess slope is about 20 m.