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DEVELOPMENT OF SPECTRAL PSEUDO-STATIC METHOD FOR DYNAMIC CLAYEY SLOPE STABILITY ANALYSIS
Session: Landslides and Slope Stability VI / Mouvements de terrain et stabilité des pentes VI
Fady Ghobrial, Université de Sherbrooke (Canada)
Mourad Karray, Université de Sherbrooke (Canada)
Marie-Christine Delisle , Ministère des transports du Québec (Canada)
Catherine Ledoux, Ministère des transports du Québec (Canada)
The pseudo-static method is considered the simplest approach to evaluate the stability of earth-slopes against shakes. It replaces the action of the earthquake by a constant inertial force proportional or not to the peak ground acceleration of the excitation and applies it to the potential unstable mass of the ground. However, it involves some deficiencies: it ignores the earthquake effect on shear strength and, in addition, masks the dynamic aspect of the problem (site effect, degradation of the modulus, synchronization of the movement, etc.) This study aims to examine the limitations of the pseudo-static method in order to examine the possibility of developing a more effective analysis method that allows keeping the benefits of pseudo-static method. This paper will also present the results of a case among large number of numerical simulations that were used to develop a new method of pseudo-static analysis.
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