Class 4 cross sections

Hello Karamba

When I use Karamba, is there a way to "handle" class 4 cross sections and that they may lead to local buckling?

Or is the best approch just to make sure that the cross section stays in class 1,2 or 3?

Best regards,

Silas

Replies to This Discussion

Permalink Reply by Wojciech Radaczyński on November 30, 2018 at 2:49pm

Hey,

maybe mine approach would be helpful:

- if you need only cross sections with 1-3 classes, you can get the class from "Utilization" and then make "if" statement, so further in the optimalization only 1-3 classes will be an option (for Galapagos for example)

- if you need class 4 you can make your own calculations in Grasshopper. Personally I think making your own utilization calculations in Grasshopper is always better option, because using only Utilization component can make you overlook proper buckling length for element.

Best regards :)

Permalink Reply by Silas Wettendorff Pedersen on December 3, 2018 at 2:30pm

Hey,

I think sorting out class 4 sections is the best approach for me.

Would you also consider making your own utilization of class 4 cross sections when you have a big grid-like structure.
I mean will it be possible to keep track of the effective areas for each member together with the different section-forces and orientations?

Kind regards

Silas

Permalink Reply by Wojciech Radaczyński on December 3, 2018 at 2:54pm

Hey,

in structures with a lot of members I would just sort out 4 class like you said, I did the same thing in my thesis. But it's my opinion, and I'm far from being expert :)

Best regards :)
wr

Permalink Reply by Silas Wettendorff Pedersen on December 3, 2018 at 3:46pm

Hey,

Im no expert either, so it is going to be that way :)

Best regards

Silas

Permalink Reply by Karamba3D on December 5, 2018 at 2:34am