Design of Embed Plates in concrete beams
Design of Embed Plates in concrete beams
(OP)
I have the usual references for design of embed plates in concrete walls, concrete slabs but how do you design an embed with headed studs into a concrete beam. The embed is used to conect a steel beam with a very large reaction (concrete breakout won't work). The plate is as deep as the concrete beam.





RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
How big is you reaction?
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
Pun intended?
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
From page 8:
d) The supplementary reinforcement should be anchored outside the assumed failure cone with an
anchorage length lbd according to EN 1992-1-1.
e) A surface reinforcement should be provided as shown in Figure 2 designed to resist the forces arising
from the assumed strut and tie model, taking into account the splitting forces according to 6.2.6.
It seems to me that you have to prevent this cone failure, if you don't have the capacity in the concrete you provide steel to take the full load (in this case the "hanging stirrups") and you have to anchor the steel outside of the failure cone (in this case what is left of the top of the beam). I don't see how that small area at the top of the beam can resist the 150 kip load.
RE: Design of Embed Plates in concrete beams
You need a code that applies strut and tie. Pick a code, any code...
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
While not familiar with that standard, I perused the Section 6.3, and did not find anything which disagrees with the advice I gave. It says that if the vertical component is taken into the concrete by supplementary reinforcement, the reinforcement must resist the entire force. I agree. It still works in a strut and tie manner as I tried to describe.
RE: Design of Embed Plates in concrete beams
You’ll explain this much better than I can, but, doesn’t the strut action on either side of the embed area cause a compression field which literally prevents the failure wedge (trapezoid) which the OP’er first showed?
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
Your sketch represents one truss analogy for distributing the concentrated force along the beam, but there are other solutions which don't require inclined bars. Your sketch is lacking some of the hanging stirrups, as some are going to be required between and in close proximity to the shear studs.
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams
RE: Design of Embed Plates in concrete beams