地震作用下含软弱夹层的反倾向岩质边坡动力响应及变形破坏机制研究

his article Established a three-dimensional model of the toppling rock slope with weak layer, First The acceleration response regulation of a toppling rock slope under the seismic action is discussed by using the three-dimensional finite difference software FLAC3D. Then the deformation and failure mechanism is analyzed through the nature of the plastic zone, the formation of order, the expansion of the plastic zone, changes of shear strain increment of key elements , The results showed that: under the seismic action, the amplification coefficients of the horizontal and vertical peak accelerations of the toppling rock slopes increase with the increasing elevation. The rock mass has vertical amplification effect on the input seismic waves and come to the maximum at the weak layer and the top of the slope. And the effect amplified the input seismic waves with low frequency and filtered those with high frequency．But the filtering effect is not obvious; toppling rock slope deformation and failure occurs mainly in the weak layer, The performance of the plastic zone is the upper tensile failure and the lower part of the pull-shear failure with weak layer.