To investigate the seismic cumulative failure effect (SCFE) of a reservoir bank rock slope, the dynamic displacement response of the slope was analysed using shaking table tests. A plastic effect coefficient (PEC) is proposed to reflect the plastic deformation degree of the slope under the influence of earthquakes, and its applicability in analysing the SCFEs of slopes is verified by using the Arias intensity (I_a) from the perspective of energy. The effects of the wave frequency components on the SCFE and local failure mechanism of the landslide are discussed based on the frequency-domain analysis. The results shows that the PEC fully considers the plastic deformation characteristics of the slope, and its physical significance is clear; thus, it can reflect the local failure of the slope better than the peak ground displacement (PGD). The analyses of the PEC and I_a show that the seismic cumulative failure process of the slope includes the progressive failure effect stage, initiating effect stage, and accelerated sliding stage. In addition, according to the frequency-domain analysis, the high-frequency components of seismic waves have a great impact on the accumulation process of the local slope deformation, while the low-frequency components have a controlling effect on the overall instability of the slip mass. The seismic instability of rock slopes containing complex geological structures is a progressive and cumulative failure process. Obtaining a better understanding of the SCFEs of slopes can provide a scientific basis for the identification of the seismic damage status and appropriate seismic reinforcement.

为了研究库岸岩石边坡的地震累积破坏效应（SCFE），使用振动台试验分析了边坡的动态位移响应。一种塑料效应系数（PEC），提出了以反映地震的影响下的斜率的塑性变形程度，其在分析斜坡的SCFEs适用性通过使用阿里亚斯强度验证（我_一个）从能源的角度来看。在频域分析的基础上，讨论了波频率分量对SCFE和滑坡局部破坏机制的影响。结果表明，PEC充分考虑了边坡的塑性变形特征，其物理意义明显。因此，它比峰值地面位移（PGD）更好地反映了边坡的局部破坏。PEC和I _a的分析结果表明，边坡的地震累积破坏过程包括渐进破坏作用阶段，起爆作用阶段和加速滑动阶段。另外，根据频域分析，地震波的高频分量对局部边坡变形的累积过程影响很大，而低频分量对滑坡的整体失稳具有控制作用。大量的。包含复杂地质结构的岩质边坡的地震失稳是一个逐步累积的破坏过程。更好地了解斜坡的SCFE可以为识别地震破坏状态和适当的地震加固提供科学依据。