Splicing Anchor bolts with pier Reinf?
Splicing Anchor bolts with pier Reinf?
(OP)
I have looked on this site and almost found my answer but it was completely discussed. I'm sure there is a way to justify how uplift load would transfer from an anchor bolt into the reinf of a pier, but I am not sure how to go about figuring it out.
My particular situation is that my pier is limited to 12"x12", with 3/4"dia AB's and 20k uplift. According to my ACI App D calc, I only get a capacity of pull-out, roughly 11k. Someone had mentioned to me that you could lengthen the bolts to act as a splice connection to the pier reinf, but neither of us were sure how to determine that length, considering the different steel grades (36ksi bolt, 60ksi reinf)
Anyone know?
My particular situation is that my pier is limited to 12"x12", with 3/4"dia AB's and 20k uplift. According to my ACI App D calc, I only get a capacity of pull-out, roughly 11k. Someone had mentioned to me that you could lengthen the bolts to act as a splice connection to the pier reinf, but neither of us were sure how to determine that length, considering the different steel grades (36ksi bolt, 60ksi reinf)
Anyone know?






RE: Splicing Anchor bolts with pier Reinf?
RE: Splicing Anchor bolts with pier Reinf?
Or, in other words, the length of reinf needs to be equal to development length + 2.1" beyond bottom of the bolt?
RE: Splicing Anchor bolts with pier Reinf?
To shorten your embed length you can also develop your rebar faster by using 180deg bends, 90 deg hooks, or they make mechanical heads that attach to the end of the rebar to fully develop it over the length of the head, like a stud end.
Check out the link for more:
http:
RE: Splicing Anchor bolts with pier Reinf?
RE: Splicing Anchor bolts with pier Reinf?
DaveAtkins
RE: Splicing Anchor bolts with pier Reinf?
Note that if there is shear on that same connection, you need to increase the tension in the anchor bolts to account for shear friction.
I hope this helps!
PS Check out the article about anchor bolts in AISC Engineering Journal, 2nd quarter 1983 by Shipp and Haniniger.
RE: Splicing Anchor bolts with pier Reinf?
RE: Splicing Anchor bolts with pier Reinf?
Dik