Bilin Material

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This command is used to construct a bilin something or other

uniaxialMaterial Bilin $matTag $Fy $E0 $b <$a1 $a2 $a3 $a4>

$matTag integer tag identifying material
$Fy yield strength
$E0 initial elastic tangent
$b strain-hardening ratio (ratio between post-yield tangent and initial elastic tangent)
$a1 isotropic hardening parameter, increase of compression yield envelope as proportion of yield strength after a plastic strain of $a2*($Fy/E0). (optional)
$a2 isotropic hardening parameter (see explanation under $a1). (optional).
$a3 isotropic hardening parameter, increase of tension yield envelope as proportion of yield strength after a plastic strain of $a4*($Fy/E0). (optional)
$a4 isotropic hardening parameter (see explanation under $a3). (optional)


Steel01 Material -- Hysteretic Behavior of Model w/o Isotropic Hardening

Steel01 Material -- Hysteretic Behavior of Model with Isotropic Hardening in Compression

Steel01 Material -- Hysteretic Behavior of Model with Isotropic Hardening in Tension


Code Developed by : by Dr. Dimitrios Lignos, Stanford University and was implemented by Dr. Theodore Karavasilis