Elastoplastic constitutive modelling of soilstructure interfaces under monotonic and cyclic loading
This paper is dedicated to the non-linear numerical modelling of the soilstructure interface. Thus, in a first part, after the presentation of the constitutive model, the soilstructure interface interaction is treated in terms of direct shear test simulations. A strategy for the interface model parameters identification is also presented. This strategy is linked to the similitude of soilstructure interface behavior and the soil behavior, regarding the interface surface roughness. In a second part, the performance of the numerical simulations are verified numerically against published results for soilstructure experimental shear tests. Finally, as an application, interface stress paths are studied in axially loaded pilesoil systems and load transfer mechanisms are identified.
elastoplastic interface constitutive model sand piles ssi