Table 1 Comparison between the actual value and determined by SHGO.

From: Determination of stiffness and strength parameters for the hardening soil model based on the simplicial homology global optimization and triaxial compressive test

 

c (kPa)

ϕ (o)

Rf

E50ref (kPa)

m

Actual value

20.00

30.00

0.90

30,000.00

0.80

SHGO

20.81

30.99

0.96

28,488.33

0.80

Relative error (%)

4.04

3.31

6.16

5.04

0.00