Seismic soil-structure interaction of rigid and flexible retaining walls

摘要

The nature of residual earth pressure behind a cantilever retaining wall is determined to be a function of the relative mass and stuiffness of the soil and wall. Elasto-plastic theory is used to analyse the stress condition on the interface between the soil and wall, and to predict the wall top defiections. Comparisons with data from centrifuge model tests show good agreement, even after three separate episodes of base shaking. Permanent wall movement is concluded to be ude to soil yielding in the backfill, generating locked-in lateral stresses ont he back of the wall. The method is applicable to the full range of wall stiffnesses from rigid to fiexible, and the implications of the analysis for design are discussed.