Buckling calculation/formula for parallel flanged channel
Buckling calculation/formula for parallel flanged channel
(OP)
I am in need of help regarding 'Buckling' calculations/formula to determine the size of parallel flanged channel needed. I have been searching but i find different formulas and deciding which is right is hard.
The load/force exerting upon the channel is on the 'C' or 'U' face, a pressure vessel will have support legs consisting of these channels so i need help in calculating buckling. Also if the size of channel, for example, 100x75x8x8, the calculation if the force exerted on the 75mm length face (if the channel is comprised to make a skid with equipment on).
I know of Eulers formula for this calculation but need help from scratch really.
The load/force exerting upon the channel is on the 'C' or 'U' face, a pressure vessel will have support legs consisting of these channels so i need help in calculating buckling. Also if the size of channel, for example, 100x75x8x8, the calculation if the force exerted on the 75mm length face (if the channel is comprised to make a skid with equipment on).
I know of Eulers formula for this calculation but need help from scratch really.





RE: Buckling calculation/formula for parallel flanged channel
RE: Buckling calculation/formula for parallel flanged channel
Help?
RE: Buckling calculation/formula for parallel flanged channel
it sounds to me as though the channel is supporting the long side of the cylinder with one flange attached to the pressure vessel and the other to the ground ? so the web is in compression with possibly an offset load
Quando Omni Flunkus Moritati
RE: Buckling calculation/formula for parallel flanged channel
I think I can see this without need of a sketch, both 75mm flanges are welded to a doubler plate or to the vessel itself yes?
If so take your vertical load and move it to the centroid of the channel, then add a moment to that centroid to account for moving the vertical load, calculate stresses due to moments and compressive load, also check for buckling.
RE: Buckling calculation/formula for parallel flanged channel
as opposed to df, i think you can straight-forwardly apply 1/2 the load to each web ... there's some off-set with the flange, but the load will drift toward the stiffer loadpath. if you want to limit bowing of the sides, add some web gussets into the middle of the U, yes?
Quando Omni Flunkus Moritati
RE: Buckling calculation/formula for parallel flanged channel
Anyway, draw the sketch any way you can, convert it to a pdf, and attach the pdf.
RE: Buckling calculation/formula for parallel flanged channel
Quando Omni Flunkus Moritati
RE: Buckling calculation/formula for parallel flanged channel
RE: Buckling calculation/formula for parallel flanged channel
the legs are simple columns ? I think these are probably short columns; we'd use "Johnson-Euler" but maybe you mech's have your own approach.
legs-to-skid ... i get the gussets (trying to fix the end to react tank longitudinal loads). it looks like they are a separate weldment bolted onto the skid; looks complicated to me ... why not weld (or bolt) the gusset directly onto the skid and leg webs ?
some gussets could be symmetrical about the leg; if you moved that middle brace (on the base of the skid) then the middle leg could have a symmetric gusset too. if the loads are large, i'd brace the web of the skid (a couple of angles welded/bolted on, several ways to do this).
Quando Omni Flunkus Moritati
RE: Buckling calculation/formula for parallel flanged channel
RE: Buckling calculation/formula for parallel flanged channel
RE: Buckling calculation/formula for parallel flanged channel