hollow section buckling

[robyengIT]

as far as you know are there any simplified formulas to calculate buckling of square hollow section due to vertical load applied through the I-beam as sketched (the hollow section is resting on flat plane)

 

[JoshPlumSE]

The square hollow section is in bending, right? I don't think beam buckling is an issue for this type of section.

However, local bending of the top flange due to the applied concentrated load will be a thing. I believe there are formulas in the AISC manual for how to assess the flange for the applied loading.

 

[EngineeringEric]

I think you could look at the side walls as webs, and use a similar approach as AISC has for compression loads in webs (often used for W-sections), just you have two webs and they cannot be reinforced easily. Assuming you have a concentrated load here.

 

[rb1957]

top face is in bending, side faces in shear, bottom face is going along for a ride. Unless there's a significant out-of-page dimension, and the beam is bending (then lower face is in compression).

this is another beam in top of a beam in bending question ? or is this a local problem ?

another day in paradise, or is paradise one day closer ?

 

[robyengIT]

thks for reply. It's a local problem . I will have a look to AISC DG 24 connections