Anchor bolt "group" in circular layout
Anchor bolt "group" in circular layout
(OP)
ACI-318, App. "D", includes equations for the pull-out strength of groups of anchor bolts, but assumes that the bolts are in a rectangular pattern. What do you do if the bolts are in a (large) circular pattern? Taking the rectangular area around the whole group includes a bunch of area inside the circle that isn't necessarily close to the bolts. Using an annular area around the bolt circle doesn't meet the "rectilinear geometrical figure" specified. Any ideas?






RE: Anchor bolt "group" in circular layout
RE: Anchor bolt "group" in circular layout
RE: Anchor bolt "group" in circular layout
RE: Anchor bolt "group" in circular layout
P = 4M/Nd - W/n
P = design tension loading per anchor, #
d = diameter of anchor bolt circle, feet
N = number of anchors
M = wind load moment, ft-lbs
W = tank DL resisting wind load, lbs
Best, Tincan
RE: Anchor bolt "group" in circular layout
RE: Anchor bolt "group" in circular layout
RE: Anchor bolt "group" in circular layout
RE: Anchor bolt "group" in circular layout
As to cone method, annular ring, etc.- yes, I can use these (annular ring idea sounds best). But it doesn't actually fit the ACI requirements. I'have to play with the rectangular-area-on-partial-group idea a bit to see what kind or results it gives.
RE: Anchor bolt "group" in circular layout
6" x 6" x 1/2" plate welded to the end of the bolt. We normally use 1 1/2" to 2" bolts with the plate affixed.
Tincan
RE: Anchor bolt "group" in circular layout