section deformation

[ahu861011]

As I want to set a criterion of the plastic rotation,I think to control the curvature would be a good way, but how can I extract the section curvature in the eleResponse command? or is there a better way to set the plastic rotation criterion to judge the failure of Beam with Hinges element?

[ahu861011]

Could anyone help me? SOS...

[fmk]

you can get section curvature using:

[code]
set a [eleRespone $eleTag section $sectionTag deforamations]
[/code]

this returns a list of the section deformations; which is the curvature depends on the section you provided.

you can also get plasticDeformations using:

[code]
set b [eleResponse $eleTag plasticDeformation]
[/code]

this also returns a list which for 2 d element is of size 3, the 1'st is axial, and the second 2 are rotations at 2 element ends.

[ahu861011]

Thanks,fmk.
I understand what you mean, but what I meant is how to extract the curvature in the list ,because I want to use the result of the eleResponse command in lindex command.As I konw,the deformation items of section are: axial-strain and curvature.The return value refers to what?

[fmk]

the returned result is a tcl list containing the data you want .. use tcl command lindex to extract the data.

[ahu861011]

OK,got it. thanks!