Effect of both the wall and soil inertia must be considered for the design of retaining wall under seismic conditions.
In this paper, by considering pseudo-dynamic seismic forces acting on the soil wedge and the wall, the required weight
of the wall under seismic conditions is determined for the design purpose of the retaining wall under active earth pressure
condition. The method proposed considers the movement of both shear and primary waves through the backfill and the retaining
wall due to seismic excitation. A rigid vertical retaining wall supporting cohesionless backfill with horizontal ground has
been considered in the present analysis by considering planar rupture surface. Results in graphical form show the variations
of proposed design factors viz. soil thrust factor (FT), wall inertia factor (FI) and combined dynamic factor (Fw) with respect to
horizontal seismic acceleration coefficient (kh), required for the design of the wall under seismic conditions. Also the effects of
variation of parameters like soil friction angle, wall friction angle, vertical seismic acceleration, period of lateral shaking and
amplification factor on combined dynamic factor have been studied. A comparative study between the present theory and
available pseudo-static results has shown the merits of the present analysis.