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The results of an ongoing FEM parametric study are presented regarding the dependence of the resulting seismic displacements of gravity-type earth retaining wall on backfill rigidity (φ = 28°, 35° and 42°), wall height (H = 4.0m and 7.5m) and shaking characteristics (a h =0.1g to 0.8g). The response of the two walls was analyzed by using the FE code Plaxis -which has been previously validated in a study concerning the development of phase differences between wall inertia and dynamic earth trust-for both harmonic and actual earthquake acceleration time histories applied at the base of the mesh. The results of the analyses may be used as a guide for selecting the seismic displacements that need to be taken into account in the design of the examined type of earth retaining walls.

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