Longitudinal shear stress in steel beams
Longitudinal shear stress in steel beams
(OP)
Hello,
Checking the transverse shear stress in beams is a common practice. Does the AISC explicitly mention something about the longitudinal shear stress (which is actually equal to the transverse shear stress in magnitude) check? Should it be combined with the normal stresses (due to direct tension/compression or bending)?
Regards,
Su
Checking the transverse shear stress in beams is a common practice. Does the AISC explicitly mention something about the longitudinal shear stress (which is actually equal to the transverse shear stress in magnitude) check? Should it be combined with the normal stresses (due to direct tension/compression or bending)?
Regards,
Su





RE: Longitudinal shear stress in steel beams
Dik
RE: Longitudinal shear stress in steel beams
RE: Longitudinal shear stress in steel beams
Did you find it critical then? I've done a few castellated girders and never come close to weld being critical.
Dik
RE: Longitudinal shear stress in steel beams
Not that I know of. I think that it would be implied in rare cases where it would be a concern however. Usually, you've got miles of horizontal length to deal with for horizontal shear so it's not critical. A local over-stress can redistribute elsewhere as with shear stud in composite decks. Of the top of my head, situations that would require a horizontal shear check would be built up member welds (per JP) and openings such as occur in penetrated beams and castellated beams (per dik).
In general, I would say no. Firstly, shear stresses are not directly additive to normal stresses. You'd need to combine using something like Von Mises interaction. Secondly, in most situations, you would assume the flanges to be carrying the lions share of the normal stresses, as with the transverse shear check.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Longitudinal shear stress in steel beams
Dik
RE: Longitudinal shear stress in steel beams
RE: Longitudinal shear stress in steel beams