Recorder

[KonstantinosSita]

Hello!

I have a steel 3-storey frame with braces. Each brace has 10 elements.
My code is complex and big in size,so I give you parts of it.

set noEle 10; # number of elements per brace
set NIP 3

# storey 1 - left brace
set shift 3100
for { set i 1 } { $i <= [expr $noEle] } { incr i} {
element forceBeamColumn [expr $shift+$i] [expr $shift+$i] [expr $shift+$i+1] $NIP $secTagBr1 $transfTag_Brace -iter $maxIter $tol
}

I want to find the axial deformation (deformation in the Local X axis) of this brace using a recorder command.

I tried :

recorder Element -file "Deformations_leftbrace_storey1.out" -ele 3101 section $secTagBr1 deformation

and also :

recorder Element -file "Deformations_leftbrace_storey1.out" -ele 3101 deformation

,but none of them worked..

I also to do this with some truss Elements that I have in my model.

Any ideas?..

[mapak]

Did you try basicDeformation or plasticDeformation according to this: http://opensees.berkeley.edu/wiki/index ... mn_Element??
Also maybe you should post at least the part of your code where you define the section

[KonstantinosSita]

Here is the section definition :

# command: HSSsection secID matID d t nfdy nfty nfdz nftz
HSSsection $secTagBr1 $matID_fatBrace_1 [expr 140.*$mm] [expr 16.0*$mm] 5 4 5 2

(nf : number of fibers)
You are right! Both basicDeformation and plasticDeformation work.
Can you please explain the difference between basic and plastic deformation?
Basic is "elastic" deformation? So, in order to find the total deformation, I have to add basic and plastic deformation? (basic + plastic = total)?

[fmk]

basicDeformation is total deformations in the basic system, plasticDeformation is basic - elastic.