Modelling Round HSS brace in 3story braced frames

[Prayag Sayani]

I am doing Nonlinerar analysis of a 3 story braced frame building. (2D model).

I am using nonlinear beam column element with steel 02 material for braces.

I need to know how to assign sections (no of fibres etc.) to braces.

For example, Opensees has a procedure to create wide flange steel fiber section.

How can I create Round HSS steel fiber section?

Thanks,

[silvia]

in a similar manner, but use the circular patch.

[Prayag Sayani]

Thank you very much

[Prayag Sayani]

Dr. Silvia,

Thanks for your previos reply.

Now, I am assigning section using circular patch for Round HSS braces.
The code is like this:
section Fiber $secTag {
# patch circ $matTag $numSubdivCirc $numSubdivRad $yCenter $zCenter $intRad $extRad <$startAng $endAng>
patch circ 3 32 2 0.0 0.0 4.65 5.0
}
I am not defining any layer and fiber for this section.

Now, when I run my .tcl file. The error is like this:
" WARNING: invaid no. of parameters:
patch circ $matTag $numSubdivCirc $numSubdivRad $yCenter $zCenter $intRad $extRad <$startAng $endAng> error reading information in {} .
Any trouble shooting suggetions?

Thank you,

[silvia]

strange.
try and remove the commented statement.