The dynamic analysis process was started after failure in some embankments during an earthquake. In this context, maximum\ndisplacement was reported at the crest based on interaction between structure and reservoir. This paper investigates the dynamic\nbehavior of short embankment on soft soil. For this purpose, numerical analysis was carried out using ANSYS13 programbased on\nfinite-element method. Simulated models were vibrated by strong earthquake, so the peak ground acceleration (PGA) and duration\nwere 0.65 g and 5.02 seconds, respectively. The comparison results were discussed in key points of plane strain analysis based on\nmodulus ratio between saturated embankment and foundation. As concluded, the modulus ratio between 0.53 and 0.66 led to\nhaving a minimum value of horizontal displacement, relative displacement in vertical direction, and shear stress. Consequently,\nthe shear stress was increased while themodulus ratio was decreased. Finally, to avoidmore rigidity in the embankment on the soft\nsoil, optimum modulus ratio was recommended at 0.66 in order to reduce the probabilistic of body cracks at the crest with respect\nto homogeneous behavior during an earthquake.
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