Concrete Breakout

[AnimusVox]

Hey All,

I have a question: I have an embed plate at the two bearing corners of a concrete wall, which is subject to a base shear. The embed works in every capacity except for concrete breakout. I asked a coworker and he feels that the wall reinforcement would be sufficient to receive the breakout load - but I'm not convinced. I feel that stirrups that intersect the anchors would be necessary, or hooking the wall reinforcement at the ends.

Thoughts?

 

[KootK]

I agree with you. I'd think that you'd at least want a horizontal u-bar or two behind the channel and wrapped around the vertical DBA's to drag the load back into the body of the wall. If there's space you might get he job done with some horizontal deformed bar anchors welded to the channel. You generate some fine detail sketches by the way. I wish my junior engineers were as meticulous with their work.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[haynewp]

I would use properly placed hairpins around the DBAs or bars welded to the channel developed parallel to the shear.