sticksandtriangles
Structural
- Apr 7, 2015
- 494
We've got a debate in the office if stirrups used to resist a concrete breakout failure plane in typical shear lug need to be developed on both sides of the failure plane in order to be effective.
Do the stirrups that do not meet Ldh on the free edge of the failure plane fail to develop Fy?
A counter argument to this is that for small depth beams, the same shear equation is utilized, regardless of development length.
Does anyone have a code reference/testing that makes a statement regarding the need for development of this reinforcement?
One item found this statement in the best paper on anchoring to concrete, it looks like they recommend 20ksi max on the 135 end seismic hook. No mention of Ldh.
Thanks!
S&T -

Do the stirrups that do not meet Ldh on the free edge of the failure plane fail to develop Fy?
A counter argument to this is that for small depth beams, the same shear equation is utilized, regardless of development length.

Does anyone have a code reference/testing that makes a statement regarding the need for development of this reinforcement?
One item found this statement in the best paper on anchoring to concrete, it looks like they recommend 20ksi max on the 135 end seismic hook. No mention of Ldh.


Thanks!
S&T -