China is a country with frequent seismic disasters, so it is of great significance to explore the effects of earthquakes on slope stability to study the safety and protection of slope engineering. The loading of seismic waves easily leads to slope instability, and the effect of the loading amplitude on various slope parameters needs to be further studied. This paper uses the FLAC3D numerical simulation software to establish a slope model with three fixed directions at the bottom. The loading values of seismic waves with amplitudes of 0.1g, 0.2g, 0.4g, 0.6g, 0.8g, and 1.0g are input into the model to compare and analyze the dynamic response of rocky slopes under the input of accelerations with different amplitudes and combine with the analysis of the cloud diagrams of various parameters of the slope, which shows that: the results of numerical simulations can cause the slope instability, and the influence of the loading amplitude on the parameters of the slope needs to be further investigated. The results show that the numerical simulation results can better reflect the effect of seismic wave loading. The increment of displacement and shear strain increases exponentially with the amplitude, and the stress shows an increasing and decreasing trend. Under the action of high-intensity earthquakes, the slope is most seriously damaged in the XZ direction. When the input acceleration reaches 1.0g, the local plastic deformation accumulates to form a through-sliding surface, and the slope appears to be seriously damaged and unstable. Basically, an earthquake causes gradual damage to a rocky slope: first, the slope stabilizes itself, then the soil at the slope's top undergoes plastic deformation, and finally, the slope tends to slide and sustain damage.

Zhe Huang, Cheng Li. Study on Dynamic Response and Progressive Damage Process of Rocky Slopes under Seismic Action. Academic Journal of Architecture and Geotechnical Engineering (2025), Vol. 7, Issue 2: 31-38. https://doi.org/10.25236/AJAGE.2025.070205.

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