Determining parameters of the CSUH constitutive model by genetic algorithm

Abstract

In this paper, the genetic algorithm (GA) is applied to determine the parameters of unified model for clay and sand, referred to as CSUH constitutive model. When determining the parameters of CSUH model by conventional methods, many conventional tests are required to be done, including low and high confining pressure triaxial tests and isotropic compression tests with specific initial void ratio. That will take more efforts and long time, and a basic understanding of CSUH model should be requested at the same time. However, using GA to automatically determine those parameters only needs a small amount of conventional triaxial tests. Finally, taking the parameters determination of Toyoura sand in CSUH model as an example, the GA is used to determine the parameters according to the partial experimental data and then to predict all the experimental data, the prediction result is acceptable.