An urgent comment for the use of “ForceBeamColumn3D”

[ttt]

Hi,

I analyzed a typical structural system with both elastic and elasto-plastic materials, thereby utilizing the element “ForceBeamColumn3D“ for the nonlinear analysis.

Elastic: Elastic module:30000, Area: 11.77, Inertia Moment: 310.1
Elasto-plastic: Steel01, Elastic module:30000, Area: 11.77, Inertia Moment: 310.1, Fy: 60, b:1.0, Integration Point Number: 5

Then, I draw the load-displacement responses and load the sketches in the following links as:

(elastic) https://drive.google.com/file/d/1CB8Dhz ... 1hOpk/view
(elasto-plastic) https://drive.google.com/file/d/11aDePL ... jEOs1/view

But, I can not make a comment about why the ratio of load-values between two graphs becomes to be almost 1/300.

wishes,

[selimgunay]

You might be doing something wrong for the elasto-plastic case. Are you using a fiber section?

[ttt]

Dear Selimgunay,

Firstly, thank you for your support...

you are certainly right. In fact, I solve it. But, there exists another reason in obtaing such a sketch which is located in the link. I obtain them thereby utilizing an approach without interacted behaviour.

Best wishes,