Warping constant, H for lipped sections
Warping constant, H for lipped sections
(OP)
I am trying to do a spreadsheet to design a purlin section made of a back to back cold formed lipped channel and cold formed lipped angle. I need an expression for the warping constant (H in mm6) to do the calc. I have a reference which gives an expression for this for built up I sections but not for my particular case. Can anyone help?
Carl Bauer
www.bauerconsultbotswana.com






RE: Warping constant, H for lipped sections
RE: Warping constant, H for lipped sections
That's a great little program and it answered my question but I am still concerned that I don't know the theory behind it. Can anyone point me to a reference?
Carl Bauer
www.bauerconsultbotswana.com
RE: Warping constant, H for lipped sections
Carl,
The reference "Design of COLD-FORMED steel structures" by Prof Greg Hancock is a good one, with a balance between theory and design.
It used to be available from the Australian Institute of Steel Construction, but my copy is dated 1988.
I am not sure exactly what you want in terms of "reference" but a book that describes the two components of torsion - uniform and non-uniform torsion - of steel structures should describe warping torsion and the derivation of the warping section constant. One good reference is "Bahaviour and Design of Steel Structures" by Trahair and Bradford - thinned walled sections are detailed in a chapter without too mnay differential equations.
HTH
RE: Warping constant, H for lipped sections