Fully undrained cyclic loading simulation on unsaturated soils using an elastoplastic model for unsaturated soils

A constitutive model for unsaturated cemented soils under cyclic loading

On the basis of plastic bounding surface model, the damage theory for structured soils and unsaturated soil mechanics, an elastoplastic model for unsaturated loessic soils under cyclic loading has been elaborated. Firstly, the description of bond degradation in a damage framework is given, linking the damage of soil’s structure to the accumulated strain. The Barcelona Basic Model (BBM) was cons...

An Elastoplastic Hydro-mechanical Model for Unsaturated Soils

This paper presents a coupled elastoplastic constitutive model for predicting the hydraulic and stress-strain-strength behaviour of unsaturated soils. Hydraulic hysteresis in the water-retention behaviour is modeled as an elastoplastic process with the elastic region of the saturation degree. The effect of change in degree of saturation on the stress-strain-strength behaviour and the effect of ...

Theoretical Undrained Shear Behaviour of Unsaturated Soils

Prediction method for undrained shear behaviour of unsaturated soils is discussed in this paper. Based on Original Cam Clay model, authors have proposed constitutive model for unsaturated soils that the effect of water content is incorporated into superloading surface concept. Firstly, stress path of constant volume shear test is formulated under constant void ratio condition. And relationship ...

Flow Simulation in Unsaturated, Heterogeneous Soils

Porous media flow models are applied in important areas of interest, including environmental studies or industrial applications. In this case, large-scale experiments are usually expensive, or even impossible, so computer simulations should replace them. Here we focus on the numerical simulation of a flow in an unsaturated, heterogeneous soil. We summarize briefly some results concerning the mo...

A Fully Coupled THM Double Porosity Formulation for Unsaturated Soils