In order to reveal the variation law of seismic damage multiplier of foundation pit considering the influence of seismic force under plastic limit state,taking a foundation pit project as an example,the seismic performance is analyzed by using the principle of limit analysis.The results show that the limit analysis solution is more conservative than the traditional finite element solution and the difference between the two is not large.The bearing capacity of the foundation pit to the seismic acceleration in all directions is different,among which the bearing capacity to the vertical downward seismic acceleration is the strongest.Under the action of seismic force,the bending failure of bored piles and carbon steel anchors will occur.With the increase of the number of anchor bolts and the depth of bored piles,the seismic damage multiplier of foundation pits also increases gradually.
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