Novel approach to apply existing constitutive soil models to the modelling of interfaces

A novel scheme to apply constitutive (continuum) soil models the mechanical modelling of soil-structure interfaces is presented. Opposite existing approaches, all normal stress components interface depend directly on adjacent continuum. This allows satisfy boundary conditions not only for continuum but also interface. Interface based Hypoplasticity with intergranular strain extension and Sanisand (version 2004) are formulated. They implemented in framework a mortar contact discretisation technique finite element code, which available download. numerical differentiation used secure consistent derivatives forces respect displacement. The performance proposed evaluated by comparison data from (cyclic) simple shear tests an (hypoplastic) model Stutz et al. (2016). Subsequently, large-scale cyclic test complex geometry simulated using different models. It concluded that formulation appropriately consider