3. Settings#
3.1. Classification#
Eleven parameters are required to define model CSSM. These are classified in the Section 3.2.
3.2. Special cases#
By design, model CSSM is a hybrid model that combines two modified Cam-Clay (component 1) and Iwan (component 2) models. This combination is achieved by weighting the shear behavior using the parameter \(\rho\in [0;1]\). So the cases individuals can be deducted.
If \(\rho=1\): the initial elasticity domain of the CSSM model is characterized by the intersection \(\left\{f_{0}\leq 0 \cap F_{1,0}\leq 0\right\}\) where according to
critere_plasticite_1_initialandcritere_plasticite_2_initial:It is easy to see that \(\left\{f_{0}\leq 0 \cap F_{1,0}\leq 0\right\}=\left\{f_{0}\leq 0\right\}\) and that only component 1 of the CSSM model is acting.
If \(\rho=0\): the initial elasticity domain of the CSSM model is, on the other hand, characterized by \(\left\{f_{0}\leq 0 \cap F_{1,0}\leq 0\right\}\) with:
In this case, as long as we are only interested in shear behavior, only component 2 of model CSSM acts.
We illustrate in Section 5 that selecting \(\rho\in\{0,1\}\) does not make it possible to predict satisfactorily both the behavior of a ground material under monotonic and cyclic loads, ranging from very low to average levels of deformation. It is therefore the combination of the two components that improves the predictions, and in fact justifies the interest of the model. CSSM.