1. Reference problem

1.1. Geometry and meshes

We consider a horizontal and circular cable contained in concrete. The mesh of the concrete part is the same for each model. But the cable mesh is changing.

Modeling A: the cable was constructed from the equation of the circle; it has 100 meshes of type SEG2. It is very regular, spline interpolation is correct. This modeling serves as a reference for the other two.

Modeling B: the cable (like concrete) comes from a mesh of the Vercors enclosure. Cable discretization is identical to modeling A (100 meshes).

Modeling C: the cable (like concrete) comes from a finer mesh of the Vercors enclosure, it has 302 meshes.