Anchor bolt pullout strength in concrete
Anchor bolt pullout strength in concrete
(OP)
For steel anchor bolts, embedded in concrete during the concrete pour (i.e. no epoxy), can anyone direct me to a table or simplified calc method. Interest is in 3/4" to 1" AB, various embedment between 12" and 96".
Concrete can be assumed to be 3000PSI.
My web search has yielded no useful results. My structural books seem to focus on steel to steel connections only.
Thank you
PacificSteve
Concrete can be assumed to be 3000PSI.
My web search has yielded no useful results. My structural books seem to focus on steel to steel connections only.
Thank you
PacificSteve






RE: Anchor bolt pullout strength in concrete
This is as simple as you're going to see. Anything else is analytical and a royal pain.
RE: Anchor bolt pullout strength in concrete
Hope this helps.
Tom
RE: Anchor bolt pullout strength in concrete
I believe ACI has a similar approch, but in Canada, A23.3 defines Pr = 0.3 Ag (fc')^0.5 where Ag is the total projected area from anchor head(s).
fc' = 20.7 MPa
for single bolt, 12" embedment case:
Ag = (12"+12")^2, or 0.37 m^2
and Pr = 0.3 x 0.37 x 20.7^0.5 = 505 kN (113 kip)
for single bolt, 96" embedment case:
Ag = (96"+96")^2, or 23.78 m^2
and Pr = 0.3 x 23.78 x 20.7^0.5 = 32 462 kN (7,298 kip)
These values are LSD resistance values intended to be used with the basic dead & live load factors 1.25 and 1.5 respectively.
RE: Anchor bolt pullout strength in concrete
RE: Anchor bolt pullout strength in concrete
http://www.drillcogroup.com/maxi_bolts/engineering/maxi_calc/bolt_calc
Use at your own discretion. I checked its results against my own calculations and found slight differences, but as I recall they were fairly close.
RE: Anchor bolt pullout strength in concrete
Inspector Jeff in Florida
RE: Anchor bolt pullout strength in concrete
PacificSteve