This is the model which
is extended to a 3D-model based on the 1D-creep theory.
In case that time-dependent behaviors is critical, this
model is applicable to estimate the creep from FE analysis.
The stress dependent stiffness parameters can be estimated
from compression and recompression index as in Modified Cam Clay
model. Unlike MCC model, the user can consider secondary
consolidation.
Following is the
summary of parameters for the hardening soil model.
Parameter |
Description |
Reference value
(kN, m) |
Soil stiffness and
failure |
λ |
Swelling index |
Cc / 2.303 / (1
+ e) |
κ |
Compression index |
Cs / 2.303 / (1
+ e)
(Cc / 5 for a rough estimation) |
μ |
Creep index |
Cc / 20 for a rough
estimation |
c |
Cohesion |
Failure parameter
as in MC model |
φ |
Friction angle |
Failure parameter
as in MC model |
ψ |
Dilatancy angle |
0 |
Advanced parameters
(Recommend to use Reference value) |
KNC |
Ko for normal consolidation |
1-sinφ
(< 1) |
Cap yield surface |
OCR / Pc |
Over Consolidation
Ratio / Pre-overburden pressure |
When entering both
parameters,
Pc has the priority of usage |
α |
Cap Shape Factor
(scale factor of preconsolidation stress) |
from KNC (Auto) |
|
