2. Modeling A

2.1. Characteristics of modeling

The safety factor for the upstream slope of the dam is calculated taking into account the presence of the interstitial pressure field due to the infiltration of water into the dam. The mechanical effect on the hydraulic field is overlooked. The hydromechanical problem is therefore solved by chaining, and introduces the interstitial pressure field into the mechanical calculation by assigning the command variable PTOT in the master field that was entered in the CALC_STAB_PENTE macro command.

The dam is modelled in D_ PLAN_HS for hydraulic calculation and in D_ PLAN for stability analysis.

Because of hydrostatic pressure, the downstream slope is normally less stable than the upstream slope. In order to calculate the safety factor for the upstream slope, you must define a zone SRM that excludes the slope downstream. The red zone in the is defined as zone SRM. This zone is defined by a mesh group that is not used when allocating materials, and therefore makes it possible to validate the mesh processing algorithm in the macro command CALC_STAB_PENTE.

In order to test the verification of the law of behavior in zone SRM, we define the elastic behavior relationship on downstream recharge. This demonstrates the possibility of affecting other behavioral relationships only Mohr-Coulomb and Drucker-Prager outside zone SRM.

We use the law of exponential variation of the safety factor increment, with « INCR_INIT = 0.04 » and » RESI_MAXI = 0.02 », or 1 refinement in total before the convergence of the algorithm. The sliding surface is visualized via the product concept evol_noli.

2.2. Tested sizes and results

The safety factor and the maximum total displacement are tested at each iteration SRM. Reference values are shown in Tableau 2.

The component V1 is also tested on the node named N1 (cumulative plastic deformation) of the VARI_NOEU field included in the evol_noli product concept. The reference value is shown in Tableau 3.

Table 2: Reference value at node N1 of the cham_defo

Identification	Reference type	Reference value	Tolerance
V1	“NON_REGRESSION”	0.001287715823488581	0.0001%

Table 3: Reference values from the FS table (Modeling A)