PREDICTION OF SUBGRADE MODULI FOR SOIL THAT EXHIBITS NONLINEAR BEHAVIOR

摘要: The main objective of this report is to develop a simple and accurate procedure predict an equivalent one-layer subgrade modulus for soil that exhibits nonlinear behavior in flexible highway pavement system. analysis predicated on developing such would yield identical values either vertical strain deflection at the top compared with results obtained from stress-dependent iteration technique accounts (nonlinear) subgrade. Use modified elastic layered computer program was made determine nearly 3900 separate problems. By using obtained, multiple regression techniques were used predictive equations as function properties. partial model regressions allowed be had correlation coefficients excess 0.95 residual errors less than 10 percent. Both analytical nomographic solutions are presented demonstrate simplicity approach. It found deflection-based larger or equal strain-derived given set load, pavement, Although subgrade-strain-derived moduli generally independent incorporation overburden stresses, based criteria, without considered, almost always developed incorporated into analysis. (Author)