curve moment-rotation

[ehsanala]

hi
How to Draw curve moment-rotation?Which recorder?

grateful

[wuhaoshrek]

ehsanala wrote:
> hi
> How to Draw curve moment-rotation?Which recorder?
>
> grateful

use element recorder to get the end node moment and rotational deformation, assuming you are using beam column element.

[fmk]

http://opensees.berkeley.edu/wiki/index ... re_Example

[jovillarroelb]

wuhaoshrek wrote:
> ehsanala wrote:
> > hi
> > How to Draw curve moment-rotation?Which recorder?
> >
> > grateful
>
> use element recorder to get the end node moment and rotational deformation, assuming
> you are using beam column element.

wuhaoshrek, I'm looking for this for a while, could you give an example of the recorder (3D model)?. I have an element recorder but it gives me forces. i tried "deformation" at the end but no response.

Thanks!

[wuhaoshrek]

jovillarroelb wrote:
> wuhaoshrek wrote:
> > ehsanala wrote:
> > > hi
> > > How to Draw curve moment-rotation?Which recorder?
> > >
> > > grateful
> >
> > use element recorder to get the end node moment and rotational deformation,
> assuming
> > you are using beam column element.
>
> wuhaoshrek, I'm looking for this for a while, could you give an example of the
> recorder (3D model)?. I have an element recorder but it gives me forces. i tried
> "deformation" at the end but no response.
>
> Thanks!

I think the recorder command for 2D is also applicable for 3D, in which you need to expand the DOFs you want to record.

My understanding for you is that you want to have the end node moment with end node rotation, so here is the example,
1st line to recorder rotation of the end node and the 2nd line is to recorder end node forces for the element, which includes
end node moment that you want:

recorder Node -file DispNode1.out -time -node 1 -dof 3 disp ;
recorder Element -file globalForceElement1.out -time -ele 1 globalForce ;

If you want to recorder the section moment-curvature response, you just need use 1 recorder as follows:

recorder Element -file Deforforce_Ele1_Sec1.out -time -ele 1 section 1 forceAndDeformation ;

Best.

[jovillarroelb]

Thanks!

It was very helpful!. So, for my 3D model it would be:

recorder Node -file DispNode1.out -time -node 1 -dof 4 5 6 disp ;
recorder Element -file globalForceElement1.out -time -ele 1 globalForce ;

Right?

Now, the displacement of the recorder it is in which units? rad or rad/mm?