Concrete01 Material -- Zero Tensile Strength

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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*


  • 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


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