Euler Buckling
Euler Buckling
(OP)
Hi all,
I have a question regarding the application of the Euler Buckling theory.
Q - Can this theory / equation be applied to a horizontal 'H' beam with a U.D.L? with the flanges in the Horizontal axis, ie; the web will be buckling / taking the compression load. (Boundary conditions fully fixed i assume)
Thanks.





RE: Euler Buckling
Quando Omni Flunkus Moritati
RE: Euler Buckling
RE: Euler Buckling
It still seems a little unclear to me.
the 'H' beam will only have a compressive force on the Web ie; the 'H' beam is in the horizontal plane. U.D.L in the vertical axis
No axial load will be applied (in the horizontal plane),
Specifically i see the problem area in the second moment of area Ixx calc to include or account for the length as the bd^3/12 form of the standard equation.
if that makes sense?
RE: Euler Buckling
What you are describing is a fixed-fixed beam. This is covered in the aforementioned reference at great length. The standard AISC 360-10 is available as a free download from https://www.aisc.org/WorkArea/showcontent.aspx?id=... Chapter F is applicable to members subjected to flexure.
RE: Euler Buckling
you've described a beam (with an "H" cross-section) with a UDL ... pretty standard.
are you asking about allowables to the flanges of "H", buckling under the bending stress ? to me looks like a flat plate, 1 side free, 3 sides SS ... yes?
Quando Omni Flunkus Moritati
RE: Euler Buckling
Consider the beam is fixed in the Y axis ie; fully supported.
Attached sketch for clarity
RE: Euler Buckling
consider 1" of span, loaded by 1" of UDL, I = t^3/12, L = H (depth of beam) ... no?
Quando Omni Flunkus Moritati
RE: Euler Buckling
thanks ive calculated a critical load of 89.15kN for a 20mm section / thickness with a total length of 3840mm and E as 200GPa does that sound reasonable ?
Thanks for the help!
RE: Euler Buckling
RE: Euler Buckling
Quando Omni Flunkus Moritati
RE: Euler Buckling
You'll need to look into the proper K-factor to use given the end restraints.
If it's a rolled beam, you have corner radii that would act to shorten the effective length. I don't know how you'd figure the amount.
But yes, the situation can be handled as a column.
RE: Euler Buckling
RE: Euler Buckling
online Euler buckling calculator
Have Fun!
James A. Pike
www.xl4sim.com
www.erieztechnologies.com