Stitch Weld
Stitch Weld
(OP)
I have a composite T-Section that is composed of a 1/4"x3" plate with a 3/8" x 4" stem plate. A 3" @ 12" stitch weld, staggered on opposite sides, holds the plate together. The section is subjected to an axial load. The question I have concerns the variables Q and I in the shear flow equation v=VQ/I. Question 1: Do I consider my I over the entire top area of the stem plate? Or just the 3" weld area? Question 2: When calculating Q over the entire top section of the stem plate, with considering my neurtal axis at the center, Q=0 for one side of the stitch weld. Any suggestions would be appreciated.






RE: Stitch Weld
RE: Stitch Weld
RE: Stitch Weld
If you have bending, with the associted shear force V varying across the span length, then the q = VQ/I is applicable where V is the vertical shear, I is for the overall section (the whole T section) and Q is the area of the "T" flange plate times the distance from the centroid of the "T" flange to the centroid of the overall shape.
DWHA, I think CCB1 used the term "composite" to imply the two plates work together, not that there was a concrete slab with shear connectors.
RE: Stitch Weld
RE: Stitch Weld