embed plate effect on shear capacity of beam

[struct_eeyore]

Sorry if this seems like a repost, but my original post over the the weekend seemed quickly disappear down the threads.

When using an embed plate, specifically in a face of a concrete beam, how much do the studs impact the shear capacity of the beam?
I can't find any guidance, or even research paper on this, so maybe I'm overthinking it; however, if for example were dealing w/ a 8x16 beam (typical size in my parts in for a 8" cmu construction) - it seems that having 3 studs cut thru any given section of the beam, especially where a load comes in that induces high shear, there should be some reduction to Vc. If anything, the face of the studs and the concrete immediately around it will be very smooth, and any kind of shear friction mechanism will be compromised.

Thanks in advance.

 

[HDStructural]

I am not familiar with any code provisions requiring a reduction in beam strength due to studs or bolts in the side of a beam. Your concern would also apply to a beam with post installed anchors on the side of it.

I understand your thought process, since there is less concrete where the studs are placed. If you are worried about shear in the beam, consider adding more stirrups to increase the capacity.

 

[BulbTheBuilder]

It would be great to find a reference but from my understanding, I don't think you've a problem.

I am thinking about this from mechanics of solids. The area of concrete filled by the stud can be transformed into an equivalent section; n=Es/Ec.
Vn = vc + vs. If vc is reduced because of the stud, the same stud provides a strength equivalent or greater than that of vc at that location.

Besides, we reinforce concrete with steel whenever we have shear deficiencies so no problem unless you case is unique.