Modelling Ductility of Column

[zanchu]

Basically, as the transverse steel ratio of a coulmn changes, the ductility of the column changes accordingly. Is there any way to model the effect of change of transverse steel ratio so to observe the change in ductility of the structural members (column) in opensees?
Thank your for your help in advance!

[zvidrih]

Hi!

Well, I guess that you have some formula to calculate the stress-strain relationship for confined concrete...
Why don't you use Tcl commands to create the material properties that you're using...

e.g. if you're using Concrete04
# transverse steel ratio
set rhoS someValue
...
set fcc [expr SomeFunction fc fl]
set ecc [expr SomeOtherFunction $fcc fc]...
set ecc [expr SomeTotallyDifferentFunction $rhoS $fyh $esu $fcc]...
(mind the sign)
uniaxialMaterial Concrete04 $matTag $fcc $ecc $ecu $Ec

Hope it helps,

Zlatko Vidrih

[luoyunbiao]

Thank you!