HSS End connection welded from three sides only
HSS End connection welded from three sides only
(OP)
Hi,
i have the following connection which is RHS250x150x12.5(beam) directly welded (CJP) to SHS180x180x12.5 / SHS150x150x12.5(column), the angle was provided as a seat and it was supposed to be removed after welding three sides of the beam then weld the lower side.
Now i have been told that the angles have been welded 8 or 10 mm (to the column) by mistake and they CAN'T remove it ! is that acceptable ? what should i do as a recovery and how can i check it ?






RE: HSS End connection welded from three sides only
RE: HSS End connection welded from three sides only
RE: HSS End connection welded from three sides only
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: HSS End connection welded from three sides only
shouldn't the moment be transferred by the upper and the lower walls, since the moment distribution will be the maximum at these walls
RE: HSS End connection welded from three sides only
Each angle iron is 100x100x10 x 170 mm (long), so weld all-around every angle's edges with a 8 mm - 10 mm fillet. You will end up with slightly more weld metal, and that weld metal is on average further from the joint's original shape, so the total moment resistance to twisting is greater.
Leaving as-is (with the short and very irregular) "tack welds" - which few welders take seriously for penetration, length, nor quality! - is not acceptable.
RE: HSS End connection welded from three sides only
No. Because of column flexibility, the side walls will be the stiffest place to transfer moment. Do you have the AISC HSS connection design guide or the CIDECT design guides? They both cover this kind of connection. Are you required to transfer the full Zx x Fy moment here?
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: HSS End connection welded from three sides only
RE: HSS End connection welded from three sides only
RE: HSS End connection welded from three sides only
RE: HSS End connection welded from three sides only
RE: HSS End connection welded from three sides only
Brad805, the fabricator welded this plate with 8 mm weld by mistake and these column ( too many) have been installed , they are at the edge of a tower elevated at 250+ meters. Removing the plate and fixing the damaged column will be hard, time consuming and dangerous.
Kootk, I am reviewing the CIDECT and it is mentioned here that when you have a widths ratio = 1 ,it will be stiff enough to transfer the loads through the walls parallel with the column, but does it means that these walls will never transfer the moment ! If so , should I just fillet weld the angle to the beam ?
The moment is reversal at this connections, with presence of tension and shear on both axis.