Seismic Analysis and Design of Retaining Walls
Incorporation of effects of earthquakes are vital aspect in present designs due to the prevailing conditions in the world. Therefore knowing the facts adequately will help engineers to think about these when designs are carried out.
Different literature can be found for finding the effect of the earth pressure on retaining walls. One of famous analysis is Mononobe - Okabe analysis. This analysis is a extension of the Coulomb sliding-wedge theory taking in to account horizontal and vertical inertial forces acting on the soil. This analysis is described in detail by Seed and Whitman (1970) and Whitman and Liao (1985).
Mononobe - Okabe analysis is based on few assumptions. Following conditions should be satisfy to apply the this analysis.
- Wall is fee to yield sufficiently to mobilize the active pressure
- Back fill completely above the water table or below the water table. If top surface is not horizontal then soil can be partially saturated.
- Valid for cohesionless soil
- Surcharge is uniform and cover the entire area