confinedconcrete01

[cxs]

I am trying to define FRP jackets for columns in the following way, and I get an error saying
"uniaxialMaterial cannot be added to modelbuilder". Is it correct to use a ductility ratio as high as 1000 as shown in the example? Does the outer radius in the patch command include the total thickness of the wrap?
Is it accurate to define the core, cover and wrap as separate patches?

Thank you!


uniaxialMaterial ConfinedConcrete01 $IDcore C $fc1U $Ec -epscu $eps2C -varub 44 0.5 12 $Fy $Es $Bs 1000.0 1.374 -wrap $cover $Am $Sw 565 33360

set ColSecTag_M 1;

set riCol 0.0; # inner radius of column section
set roCol $Rcol; # outer radius of column section
set nfCoreR 24; # number of radial fibers in core (number of "rings")
set nfCoreT 47; # number of tangential fibers in core (number of "wedges")
set nfCoverR 4; # number of radial fibers in cover
set nfCoverT 47; # number of tangential fibers in cover


section fiberSec $ColSecTag_M {
set rc_M [expr $roCol-$cover]; # Core radius
patch circ $IDcore $nfCoreT $nfCoreR 0 0 $riCol 24.2 0 360;
set theta [expr 360.0/$NbCol_M]; # Determine angle increment between bars
layer circ $IDsteel $NbCol_M $AbCol_M 0 0 $rc_M $theta 360; # Define the reinforcing layer
}

[Panos]

Have you specified a unique material tag?