Re: more aci 318

There is a simple way to get around the Appendix D shear cone failure limitation.  Add shear stirrups or stud rails that pass through the failure cone.  Then you design the transfer from the AB to the shear reinforcement using a strut and tie approach.  This is discussed in ACI 318-08 Appendix D.
If you were near the edge of concrete you might still have a side blow out issue.
When you have multiple bolts in a group placing a large plate in the concrete can actually reduce your capacity.  There is a good graphic in ICC AC308 which explains why.  You want to engage the concrete below the bolt group.
According to Appendix D a standard double hex bolt will develop most anchor rods.  With the high strength rods you might need a plate but I would keep it thick.  If the flexural flexibility of the plate is significant it will not act as you assumed.
Mark Gilligan

******* ****** ******* ******** ******* ******* ******* ***
* Read list FAQ at: http://www.seaint.org/list_FAQ.asp
*
* This email was sent to you via Structural Engineers
* Association of Southern California (SEAOSC) server. To
* subscribe (no fee) or UnSubscribe, please go to:
*
* http://www.seaint.org/sealist1.asp
*
* Questions to seaint-ad@seaint.org. Remember, any email you
* send to the list is public domain and may be re-posted
* without your permission. Make sure you visit our web
* site at: http://www.seaint.org
******* ****** ****** ****** ******* ****** ****** ********