On Anchor Bolt design as per ACI 318-04

[Shindey]

Hi,
Am I wrong in assuming that ACI 318 14 deals with Shear design of anchor bolts in which the shear force is in a direction of critical edge.
Can I neglect the cases where the shear force is directed away from the critical edge?
What about the case when it is not clear that Shear is neither towards the critical nor away from it?
Iam enclosing diagram for better understanding of the query.
Rgds
Shindey

 

[KootK]

Can I neglect the cases where the shear force is directed away from the critical edge?

Depends how you look at it I suppose. There are multiple "shear" modes of failure. A direct shear breakout failure may well be precluded with the loading directed away from the free edge. However, a pryout failure may still govern and I'd be inclined to classify that as a mode of shear failure since it can arise as a consequence of shear only load application.

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.

 

[TehMightyEngineer]

Parallel-to-edge shear failure modes can be controlled by concrete breakout. Off the top of my head I recall that you double your shear-toward-edge concrete breakout strength.

As KootK said, tensile pryout is a shear failure mode and needs to always be checked; this will generally control for anchors away from edges.

Ian Riley, PE, SE
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries

https://www.facebook.com/AmericanConcrete/

 

[Shindey]

KootK & TehMightyEngineer,
So many thanks . Pryout failure completely escaped my mind as i was focussed on breakout failure only.
Rgds
Shindey

 

[Bagman2524]

The bolt itself also has to be capable of withstanding the shear force.

All I know is P/A and Mc/I

 

[dik]

All I know is P/A and Mc/I

and you cannot push on a rope...