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本文利用拟静力概念,根据塑性极限平衡原理,结合变分法,确定了地震条件下土坡的屈服加速度系数К_y;根据数值计算结果,探讨了地震载荷沿坡高的非均匀分布、水平与竖向地震载荷的共同作用、土粘结力沿深深度的非均匀变化、各种坡面坡面载荷、坡面几何特征等因素对土坡极限抗震能力的影响;建议采用所提出的土坡稳定包络图并配合某种分离位移量计算方法以综合评价堤坝的地震稳定性.
In this paper, based on the concept of pseudo-static force, the yield acceleration coefficient К_y of the slope under seismic conditions is determined according to the principle of plastic limit equilibrium and variational method. Based on the numerical calculation results, the non-uniform distribution and level of seismic load along the slope height are discussed. The combined effects of vertical seismic loads, non-uniform changes in soil cohesion along deep depths, various slope surface loads, and the geometric characteristics of the slopes influence the ultimate seismic capacity of the slope; the proposed slope is recommended Stabilize the envelope map and cooperate with a certain separation displacement calculation method to comprehensively evaluate the stability of the embankment.