Across The Flange Welding
Across The Flange Welding
(OP)
Does anyone know of any references that address welding across the bottom flange of an existing beam?
This question keeps coming up and my only resourse is advice from my old supervisor that it should be avoided because heating up the tension flange could induce a permanent deflection. Others have mentioned stress concentrations, but I have never bought that since the same would be true about the top flange.
Any help out there?
This question keeps coming up and my only resourse is advice from my old supervisor that it should be avoided because heating up the tension flange could induce a permanent deflection. Others have mentioned stress concentrations, but I have never bought that since the same would be true about the top flange.
Any help out there?






RE: Across The Flange Welding
If you have any reference let us know.
RE: Across The Flange Welding
RE: Across The Flange Welding
Aside from the practical issues of warping........welding across a bottom flange must be considered in terms of the reduction in allowable bending stress of the beam....welding affects the fatigue life .......generally you will have to reduce the allowable stress if there is any repetitive loadings to be considered.........for a bridge this would almost certainly not be considered acceptable.......
You should check the Fatigue section of the AISC Manual of Steel Construction......also the American Welding Society code for buildings and bridges......the details of the weld are important for any condition where stress is significant......minimum length of weld, end conditions........
RE: Across The Flange Welding
allowable stresses.
cage