Issue 51

G. Ramaglia et alii, Frattura ed Integrità Strutturale, 51 (2020) 288-312; DOI: 10.3221/IGF-ESIS.51.23

(a)

(b) Figure 8 : Comparison between experimental results and Mohr-Coulomb models: a) experimental and theoretical results comparison, b) confinement curve comparison for α =-0.1 (black solid line) and α =-0.2 (black dashed line).

Statistical parameter

Stassi D’Alia

Drucker-Prager Henky-Von Mises Mohr-Coulomb

MAPE

0.225 0.328 0.820

1.324

0.289 0.535 0.603

0.855 5.075

MSE

12.481

R 2 -0.512 Table 2 : Statistical parameters to comparison the theoretical and the experimental results, with a confined lateral stresses, , l eff f calculated according to Eqn. (13). -1.86

Statistical parameter

Stassi D’Alia

Drucker-Prager Henky-Von Mises Mohr-Coulomb

MAPE

0.243 0.311 0.833

1.375

0.280 0.496 0.800

0.887 5.419

MSE

13.342 -1.954

R 2 -0.563 Table 3 : Statistical parameters to comparison the theoretical and the experimental results, with a confined lateral stresses, , l eff f calculated according to Eqn. (18).

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