Steel02
This command is used to construct a uniaxial Giuffre-Menegotto-Pinto steel material object with isotropic strain hardening.
uniaxialMaterial Steel02 $matTag $Fy $E $b $R0 $cR1 $cR2
<$a1 $a2 $a3 $a4 $sigInit>
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) |
|
parameters to control the transition from elastic to plastic branches. Recommended values: |
|
isotropic hardening parameter, increase of compression yield envelope as proportion of yield strength after a plastic strain of \(a2*(\)Fy/E0). (optional) |
|
isotropic hardening parameter (see explanation under $a1). (optional default = 1.0). |
|
isotropic hardening parameter, increase of tension yield envelope as proportion of yield strength after a plastic strain of \(a4*(\)Fy/E0). (optional default = 0.0) |
|
isotropic hardening parameter (see explanation under \(a3). (optional default = 1.0)</p></td> </tr> <tr class="even"> <td><code class="parameter-table-variable">sigInit</code></td> <td><p>Initial Stress Value (optional, default: 0.0) the strain is calculated from epsP=\)sigInit/$E if (sigInit!= 0.0) { double epsInit = sigInit/E; eps = trialStrain+epsInit; } else eps = trialStrain; |
more on OpenSees uniaxialMaterial Arguments – Steel02
REFERENCE:
Filippou, F. C., Popov, E. P., Bertero, V. V. (1983). “Effects of Bond Deterioration on Hysteretic Behavior of Reinforced Concrete Joints”. Report EERC 83-19, Earthquake Engineering Research Center, University of California, Berkeley.
Steel02 Material – Material Parameters of Monotonic Envelope

Steel02 Material – Hysteretic Behavior of Model w/o Isotropic Hardening

Steel02 Material – Hysteretic Behavior of Model with Isotropic Hardening in Compression

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

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