Hi everyone:

I have a problem with MIDAS. I try to calculate FoS using SRM incorporated with Midas GTS NX. The model consist of a sand box (phi=30°, c=0 KPa, E=30 MPa, dilatancy angle= 0°, v=0.2) of dimensions: (40,40,-70) [m]; concrete (C25) for circular shaft of dimensions (D=22.6[m], H=-35[m]) and a foundation slab of dimensions (D=20.6[m], H=0.5[m]). The excavation have a depth of -28[m]. Using for this model a Mohr-Coulomb approach.

Alternatively, I used Plaxis 2D with axisymmetrical model, and have a FoS ~ 9.5. But when I used Midas for analysis, the program runs infinitely and don't stop.

Can you guide me how to calculate FoS using Midas GTS NX?

Thanks!

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