plastic rotation

talebian.s.e · Post by **talebian.s.e** » Thu Mar 18, 2010 10:15 am

Hi
How can I calculate plastic rotation at the two ends of a beam-column element?

and how can I calculate elastic rotation at the two ends of a beam-column element?

I am using nonlinearBeamColumn elements.

Is there any recorder element?

talebian.s.e · Post by **talebian.s.e** » Thu Mar 18, 2010 12:12 pm

Please,
can anyone help me?
I dont have much time.

Post by **fmk** » Thu Mar 18, 2010 2:45 pm

you can ask the forceBeamColumn for the 'plasticDeformation' and the 'chordDeformation' .. subtract the plastic from the chord and you get the elastic part of the deformations .. it is approx (look at the source code to see what it is doing)

talebian.s.e · Post by **talebian.s.e** » Fri Mar 19, 2010 2:07 pm

you mean like this:

recorder Element -file ele1local.out -time -ele 1 plasticDeformation;

And

recorder Element -file ele1local.out -time -ele 1 chordDeformation;
?

the output has four columns:

what are the second,third and forth columns?

Post by **fmk** » Fri Mar 19, 2010 3:14 pm

the first is time .. the second, thrird and fourth are axial, rotation end 1 and rotation end 2 quantaties .. use -xml instead of -file to see.

talebian.s.e · Post by **talebian.s.e** » Fri Mar 19, 2010 9:46 pm

Thanks a lot.
You are really kind to everybody.

talebian.s.e · Post by **talebian.s.e** » Mon Mar 22, 2010 1:22 pm

Hi
As I told,I use nonlinearBeamColumn element for pushover analysis and actually distributed plasticity.

now,How can I find location of the plastic hinges and their maximum rotations ?