Bracing Compression Flange for Lateral Torsional Buckling
Bracing Compression Flange for Lateral Torsional Buckling
(OP)
Can a web stiffener in a WF Beam or Column be considered to provide bracing for Lateral Torsional Buckling of the "compression" flange?
The concern is that the whole section of the WF in the plane of the web stiffener may tend to rotate, unless the "tension" flange is rigidly restained by another framing member such as a wall girt in the case of a wall column.
The concern is that the whole section of the WF in the plane of the web stiffener may tend to rotate, unless the "tension" flange is rigidly restained by another framing member such as a wall girt in the case of a wall column.






RE: Bracing Compression Flange for Lateral Torsional Buckling
RE: Bracing Compression Flange for Lateral Torsional Buckling
RE: Bracing Compression Flange for Lateral Torsional Buckling
RE: Bracing Compression Flange for Lateral Torsional Buckling
RE: Bracing Compression Flange for Lateral Torsional Buckling
RE: Bracing Compression Flange for Lateral Torsional Buckling
The concern is that the whole section of the WF in the plane of the web stiffener may tend to rotate, unless the "tension" flange is rigidly restained by another framing member such as a wall girt in the case of a wall column.
Perhaps if I can clarify:
...plane of the web stiffener may tend to rotate about the neutral longitudinal axis of the member, unless...
I believe the concept is to stabilize the "free" column flange that is not connected to a purlin or girt. The other question arises, how stiff is the connection between the "girt" and column flange? Is it stiff enough to restrain the flange and the twisting of the web in the column?
A load reversal could change a column flange force from tension to compression which might require "bracing" of the flange opposite a wall girt as an example.
I'm trying to help out a friend, and don't have anything more specific. I was attempting to identify a reference to allow or not allow this based on one of our steel codes.
Thanks for your input and interest.