The deterioration of rock mass in the hydro-fluctuation belt and reservoir-induced earthquakes in the Three Gorges Reservoir Area (TGRA) have great impact on the stability of bedding rock slope. The cumulative damage mechanism and stability of bedding rock slope under the deterioration of rock mass in the hydro-fluctuation belt, when subjected to repeated seismic loads, were investigated using the shaking table model test and Universal Distinct Element Code (UDEC) numerical simulation. Under the continuous action of seismic loads, the peak ground acceleration (PGA) amplification coefficient clearly weakens; the cumulative displacement, pore water pressure and earth pressure of the slope show a change trend of increase, increase and decrease, respectively; the damping ratio and damage degree (D_G) of the slope increase, while the natural frequency of the slope decreases gradually; the nonlinear cumulative damage mechanical models of the slope in the stages of microseism—small earthquake action and strong earthquake action can be characterized by the cubic function of “S-type” and the exponential function of “steep rise type,” respectively. Based on the good agreement between the experimental observations and numerical simulation results, the evolution process of the dynamic cumulative damage—instability and typical failure modes of the slope (including the hydro-fluctuation belt) was observed. Furthermore, the stability of the slope increases with the decrease of the slope height (A), slope angle (B), seismic load amplitude (C), seismic load frequency (D), or deterioration depth of rock mass in hydro-fluctuation belt (E), while it decreases with the increases of the strength degradation ratio of the rock discontinuities in hydro-fluctuation belt (F); the ranking of sensitivity of the mentioned-above influence factors is C > A > D > E > B > F according to the orthogonal analysis method (OAM).

三峡库区（TGRA）水力脉动带岩体退化和水库诱发地震对顺层岩质边坡稳定性影响很大。采用振动台模型试验和UDEC数值模拟方法，研究了水文脉动带岩体劣化作用下顺层岩质边坡在反复地震荷载作用下的累积损伤机制和稳定性。在地震荷载的持续作用下，峰值地面加速度（PGA）放大系数明显减弱；边坡累积位移、孔隙水压力和土压力分别呈现增加、增加和减少的变化趋势；阻尼比和损伤程度（D _G) 边坡的增加，而边坡的自然频率逐渐减小；边坡在微震阶段的非线性累积损伤力学模型——小地震作用和强地震作用分别可以用“S型”的三次函数和“陡升型”的指数函数来表征。在实验观测与数值模拟结果吻合较好的基础上，观察了边坡（包括水文脉动带）动态累积损伤—失稳及典型破坏模式的演化过程。此外，随着坡高（A）、坡角（B）、地震荷载幅值（C）、地震荷载频率（D）或水文脉动带岩体劣化深度的减小，边坡稳定性增加。 (E), 而随着水文脉动带（F）岩石间断面强度退化率的增大而减小；根据正交分析法（OAM），上述影响因素的敏感性排序为 C > A > D > E > B > F。