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Comparative Study on FEM Strength Reduction Method and Limit Equilibrium Method for the Slope Stability Analysis

Ran Li

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Abstract

The performance of FEM strength reduction method and limit equilibrium method for the slope stability analysis is compared in the present study.The results show that the FEM model mesh size can be 3% to 5% of maximum computation length,the time consumed in limit equilibrium method is relative smaller than that consumed in FEM strength reduction method,the critical slip surface obtained by limit equilibrium method is within the plastic zone from the FEM strength reduction method,and the critical slip surface by Janbu method is located usually underneath that provided by Spencer method.

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What this paper is about

The performance of FEM strength reduction method and limit equilibrium method for the slope stability analysis is compared in the present study.The results show that the FEM model mesh size can be 3% to 5% of maximum computation length,the time consumed in limit equilibrium method is relative smaller than that consumed in FEM strength reduction method,the critical slip surface obtained by limit equilibrium method is within the plastic zone from the FEM strength reduction method,and the critical slip surface by Janbu method is located usually underneath that provided by Spencer method.

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Available abstract

The performance of FEM strength reduction method and limit equilibrium method for the slope stability analysis is compared in the present study.The results show that the FEM model mesh size can be 3% to 5% of maximum computation length,the time consumed in limit equilibrium method is relative smaller than that consumed in FEM strength reduction method,the critical slip surface obtained by limit equilibrium method is within the plastic zone from the FEM strength reduction method,and the critical slip surface by Janbu method is located usually underneath that provided by Spencer method.

Key concepts: Strength reduction, Finite element method, Slip (aerodynamics), Reduction (mathematics), Stability (learning theory), Limit (mathematics), Slope stability analysis, Computation

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