Cyclic Mobilisation of Soil-Structure Interface in the Framework of Fractional Plasticity

The strength of the soil-structure interface can be mobilised when subjected to cyclic loading. To capture the cyclic mobilisation of the soil-structure interface, an advanced elastoplastic constitutive model is developed within the framework of fractional plasticity, where no additional use of an additional plastic potential is required. Considering the influence of material state and soil fabric on the plastic response of the soil-structure interface, the state-dependent fractional order and hardening modulus are proposed. Further numerical simulation of the developed model shows that it can reasonably capture the mobilised strength and deformation of the soil-structure interface under cyclic loads.