Dynamic stability analysis method of anchored rocky slope considering seismic deterioration effect

Area of Science:

• Geotechnical Engineering
• Earthquake Engineering
• Rock Mechanics

Background:

• Seismic stability analysis of anchored rocky slopes often overestimates safety by neglecting cable and structural plane deterioration.
• Accurate assessment is crucial for preventing catastrophic failures during earthquakes.

Purpose of the Study:

• To develop a dynamic calculation method for anchored rocky slopes that incorporates seismic deterioration effects.
• To propose a Gaussian mixture model-based approach for evaluating slope stability and predicting failure probability.

Main Methods:

• Established a dynamic calculation method for anchored rocky slopes considering seismic deterioration.
• Developed a stability evaluation method using a Gaussian mixture model based on the number of seismic deteriorations.
• Quantitatively analyzed the seismic deterioration effect using an engineering example.

Main Results:

• The proposed method yields lower minimum and post-earthquake safety factors compared to methods ignoring deterioration.
• The Gaussian mixture model accurately predicts the failure probability of anchored rocky slopes.
• Clarified the relationship between seismic intensity and slope failure probability.

Conclusions:

• The developed method significantly improves the accuracy of stability calculations for anchored rocky slopes.
• The findings provide essential guidance for the seismic design and safety assessment of these structures.
• Accounting for seismic deterioration is critical for reliable risk evaluation.