Continuous Beams on a Corner?

[psychedomination]

Hi there,

I’m designing a few lintels for a small structure. These lintels are only 4’ in length. I was going to have the architect build out a small block column with filled cells to support the lintel (shown as the green square on the attached) because I had designed them lintels as simply supported.
However, he has requested to remove the column because he doesn’t agree with it in the space. The simply supported linked

I just want to make sure that I am right about the structural behaviour if the beam is continuous and the intersection is at a 90-degree angle.

L2 is an 8” wide lintel and L1 is a 12” wide lintel.

The CAD drawing is showing the beams in plan and I drew what I feel the bending moment diagram will be for the beams in an isometric view. Even though the beam intersection is at an angle I just want to confirm that the structural behaviour and analysis will be the same for a normal straight continuous beam? As in will the moment distribution be the same, e.g. I can use the hogging and sagging moment distribution ratio tables that are provided in most books? As the column is existing and has no reinforcement, I can't have any bending moments in the column.

 

[phamENG]

No. At least not without some fancy torsion and other stuff that probably won't work anyway.

Make each beam its own cantilever and assume zero moment at the joint. Distribute the loading to each based on stiffness such that deformation compatibility is maintained. You'll probably have to iterate as you come up against cracked sections.

 

[MIStructE_IRE]

You’d want to be very brave.. I’m not sure you’d really convince another engineer that it works though.

I’d cantilever them both separately. Alternatively cantilever one and pin the other to it.

 

[dhengr]

Psychedomination:
And, while they may be poured at the same time, and should be reinforced to take some torsion from each other, you want both beams, independently, to be fairly stiff because you undoubtedly have loads from above and windows, or some such, below which can’t tolerate much deflection.