A state parameter-dependent constitutive model for sands based on the Mohr-Coulomb failure criterion

Dataset on the behaviour of the Areolas da Estefania formation in Lisbon and its modelling using a state-dependent soil model

“…The calibration of IC MAGE M02 [ 3 , 4 ] is outlined in detail in [3] and therefore only a brief description of the various steps required are provided herein, with particular emphasis given to those where modifications are required to address specific challenges resulting from the characteristics of the studied material. The first aspect of the model to be calibrated is that determining the shear stiffness at very small strains ( ), which is obtained directly from the Bender Elements tests by fitting a power law: where is a reference pressure (adopted as 100 kPa), is the shear modulus obtained in bender element testing at a mean effective stress of and is a parameter determining the non-linearity of the relationship between and the mean effective stress .…”

“…2 (a). The IC MAGE M02 model allows for the variation of with void ratio according to a wide range of empirical expressions [ 3 , 4 ]. However, the obtained data suggested a very limited effect of the void ratio, possibly due to the inherent variability of natural samples (see Fig.…”

“…The plastic part of the constitutive model governs yielding and hardening/softening associated with the shearing of the material. At its core, IC MAGE M02 (see [3] for details) is a critical state-based soil model, though its formulation can be adapted for situations where the clear identification of critical state is difficult (an interesting discussion on this issue is presented in [3] ). Herein, one such adaption is proposed: rather than a Critical State Line defined using a power law, a constant value of void ratio (i.e.…”

“…The modelling dataset [2] , as shown in Table 2 , consists of the simulated response for the three triaxial tests contained in the experimental dataset using the IC MAGE M02 model [ 3 , 4 ] with the parameters listed in Table 3 . The *.csv files correspond to the output of a Python script [5] which integrates the model equations for the specific case of drained triaxial compression under constant mean effective stress levels.…”