Concrete01
This command is used to construct a uniaxial Kent-Scott-Park concrete material object with degraded linear unloading/reloading stiffness according to the work of Karsan-Jirsa and no tensile strength. (REF: Fedeas).
uniaxialMaterial Concrete01 $matTag $fpc $epsc0 $fpcu
$epsU
matTag
|
integer tag identifying material |
fpc
|
concrete compressive strength at 28 days (compression is negative)* |
epsc0
|
concrete strain at maximum strength* |
fpcu
|
concrete crushing strength * |
epsU
|
concrete strain at crushing strength* |
NOTE:
- Compressive concrete parameters should be input as negative values (if input as positive, they will be converted to negative internally).
- The initial slope for this model is (2*\(fpc/\)epsc0)

Typical Hysteretic Stress-Strain Relation for material
Examples
uniaxialMaterial Concrete01 1 -4.0 -0.002 0.0 -0.005; # the concrete material with tag 1 reaches compressive strength of 4.0 at strain of 0.002 and reaches ultimate strength of 0.0 at strain of 0.005.

Code Developed by: Filip Filippou, UC Berkeley
Images Developed by: Silvia Mazzoni