Abstract
This paper describes a simplified seismic design approach proposed by the author (1979), based on limiting deformations. Limitations of the method are outlined and results of a simple computer programme presented. With further analysis, charts may be developed to provide a useful design tool.
Highlights
Despite intensive research efforts, notably at the University of California, there remains a need for a rational seismic design approach to Reinforced Earth
Where internal failure within the reinforced earth volume occurs, greater success has been met in predicting strip tensions
A similar approach is proposed by the author for seismic design proceeding on the assumption that plastic deformation is provided by slippage between the reinforcing strips and backfill material
Summary
Notably at the University of California, there remains a need for a rational seismic design approach to Reinforced Earth. In order to safely design a Reinforced Earth Wall on this basis., checks would have to be made using the highest and lowest expected values of the internal angle of friction. Using the lowest probable value of the internal angle of friction, strip lengths may be reduced until the Critical Acceleration is zero. At this point the structure will be close to failure under static conditions. By adopting an empirical estimate of the locus of peak tie tensions it may be assured that strip breakage within the Reinforced Earth volume is unlikely If this condition is satisfied, no further internal static design is required
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