地震加速度放大对均质土坡稳定性的影响规律研究

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中图分类号：TU43 文献标识码：A

Abstract：Based on the upper-bound theory of limit analysis，the pseudo-static method was carried out to assess the amplification effects of seismic acceleration on stability of homogeneous earth slopes.The least upper-bound solutions of seismic slope stability are determined and then compared with other results for verification of the presented method.A parametric sensitivity analysis is conducted for the horizontal seismic acceleration at the botom of the slope and the seismic amplification coeffcient to investigate their influences on slope stability. The results demonstrate that the stability of seismic slopes decreases with the increase of seismic amplification coeffcient，while the most critical slip surface becomes deeper.Finally，according to the correlation between the factor of safety for seismic slope and dimensionless parameters，a fitting formula is established to calculate the factor of safety for slopes subjected to the seismic amplification.It is convenient for practical engineering to quickly evaluate the influence of seismic amplification effect on slope stability.

Key Words： limit analysis；pseudo-static method; seismic amplification； earth slopes； stability analy-sis

地震强度在空间上存在很大的差异性，这不仅与震中距离、震源深度有关，还很大程度上受到地形地貌等地质条件的影响。（剩余7715字）