Reinforced beam with web penetrations?
Reinforced beam with web penetrations?
(OP)
I have an existing beam that need to be reinforced and need two 9" dia holes drilled in the web (on opposite sides of the beam). The reinforcing is due to the owner adding more load onto the beam.
I am considering welding a plate to the underside of the beam however, I am not sure how this will effect the calculation for the web penetration. I have gone through DG#2 from the AISC and am wondering if I can treat the bottom flange of the beam (where I plan to add the plate) as if the beam were composite? Does this seam feasible?
I am considering welding a plate to the underside of the beam however, I am not sure how this will effect the calculation for the web penetration. I have gone through DG#2 from the AISC and am wondering if I can treat the bottom flange of the beam (where I plan to add the plate) as if the beam were composite? Does this seam feasible?






RE: Reinforced beam with web penetrations?
RE: Reinforced beam with web penetrations?
Use trasformed sections to deterine the portion of beam stiffness to appotion between concrete and steel, and make sure that the resultant shear carried by the concrete is under phi Vc/2.
RE: Reinforced beam with web penetrations?
In the end I went through the composite equations and calculated mu only to realize that I would have been better off setting mu=0 as mu only increase the shear strength of the beam. So I probably would have been better off using the equations for a non-composite beam.