flexular rigitidy & axial stifness (Plaxis 2D)

[pant23]

Hi to all. I want to ask a question about this program. I have a tunnel (TBM) and i want to find the axial stiffness (EA) and the flexular rigidity (EI) of the segmented lining (rings). The young modulus is known (35 GPa) and i want yr opinion about this.
Thank u