Extended Barcelona Basic Model for unsaturated soils under cyclic loadings

Finite element modelling of unsaturated soils using a modified version of the Barcelona Basic Model

“…In fact, it accounts for stress triaxiality and thereby avoids a strength overestimation in triaxial extension. It is important to note that in this case the yield function in the deviatoric plane shows a very close approximation of the well-known Matsuoka-Nakai's yield contour [10].…”

“…While the former presents an advantage for laboratory calibration, the latter allows a smooth transition from saturated to unsaturated modelling concept and is thereby more efficient for numerical implementation and modelling. Further developments of the models have also included the introduction of Lode's angle dependency [9,10] to improve the modeling of stress triaxiality.…”

Discontinuous bifurcation analysis of thermodynamically consistent gradient poroplastic materials

“…Originally proposed by Roscoe and Burland (1968) for normally consolidated clays, the modified Cam Clay plasticity model has been extended to a wide range of soils including unsaturated ones (see Alonso et al, 1990;Bolzon et al, 1996), and also to the case of cyclic external actions (see Pedroso and Farias, 2011).…”

Analytical solution for one-dimensional consolidation of unsaturated soils under dynamic load

“…When discussing the problem of one-dimensional consolidation, the pore water dissipation equation is similar to the Terzaghi consolidation theory, but in the derivation process many assumptions that are inconsistent with the actual situation are introduced, such as constant total stress and so on. Since then, the analysis of the consolidation of unsaturated soil had achieved a series of results whether in terms of theoretical analysis (Sheng et al, 2019;Qin et al, 2010;Su and Xie, 2010;Ho et al, 2014;Lo et al, 2016;Wang et al, 2017Wang et al, , 2018 or numerical simulation (Chen et al, 1999;Yin and Ling, 2007;Huang et al, 2009;Pedroso and Farias, 2011). However, in the research on the consolidation theory of unsaturated soil, most of the load forms imposed on the soil are dead loads or cyclic loads.…”