Experimental and Modeling Studies of Resilient Modulus of Cohesive Soils in Shanghai

Subgrade soils are very important materials to support highways. Resilient modulus (M_r) has been used for characterizing stress-strain behavior of subgrade subjected to repeated traffic loadings. Several constitutive equations have been suggested to estimate the resilient modulus. The main objective of this study was to validate the predictability of the existing constitutive equations and evaluate the use of one or more of those equations in predicting resilient modulus of cohesive soils in Shanghai. Two predictive models to estimate regression coefficients k₁, k₂, and k₃ obtained from the lab tests was developed. The predicted regression coefficients compare well with measured ones, and the measured and predicted modulus values are not significantly different.