The pseudo-dynamic method can better consider the spatial and temporal variation character-istics of earthquake propagation.In this paper,the pseudo-dynamic analysis method is used to study the three-dimensional seismic stability of reinforced soil slopes under two different reinforcement modes of uniform reinforcement and triangular reinforcement.Based on the upper limit theorem of limit analysis,the failure mechanism of three-dimensional reinforced soil slope is constructed,the ex-pression of three-dimensional safety factor of seismic slope is derived,and the difference between pseudo-static and pseudo-dynamic analysis results is investigated.The variation law of pseudo-dynam-ic safety factor of three-dimensional reinforced soil slope is revealed by parameter analysis.The results show that the safety factor solution obtained by pseudo-static analysis is more conservative than that obtained by pseudo-dynamic analysis,especially when the horizontal seismic force coefficient kh and slope angle β are larger,the difference is more significant.With the increase of horizontal seismic force coefficient kh,ratio of slope width to height B/H and amplification factor f,the stability of re-inforced soil slope decreases obviously,while the stability of reinforced soil slope increases with the increase of average reinforcement strength k0.The influence of seismic wave period T on slope stabili-ty is small,the influence of two reinforcement modes on slope stability is the same,and the effect of triangular reinforcement mode is better.
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