Plastic Length of fiber dispBeamColumn elements

[nparsaeifard]

Dear all
Could anyone please help me?
I have used fiber dispBeamColumn elements in my model and I need to obtain "plastic rotation" of elements at both ends of elements.
As I saw the comments, I must calculate : curvature * Lp
I can obtain curvature using "deformation recorder". The problem is that I don't know how to calculate the Lp
PLEASE give me a clue, How can I calculate Lp?
Looking forward to your guidance
Thanks

[paperairplane]

the same question，help~~！

[mhscott]

You can use the element length or an empirical equation. There is no *one* way to determine Lp. You'll have to do a little research....

[paperairplane]

nparsaeifard wrote:
> Dear all
> Could anyone please help me?
> I have used fiber dispBeamColumn elements in my model and I need to obtain
> "plastic rotation" of elements at both ends of elements.
> As I saw the comments, I must calculate : curvature * Lp
> I can obtain curvature using "deformation recorder". The problem
> is that I don't know how to calculate the Lp
> PLEASE give me a clue, How can I calculate Lp?
> Looking forward to your guidance
> Thanks

Seismic Retrofit of Circular Bridge Columns for Enhanced Flexural Performance 。i think this paper may make sense