Ultimate bond stress of Plan Anchor bars
Ultimate bond stress of Plan Anchor bars
(OP)
Sirs
Can anybody suggest any reference for bond stress as per ACI-318..
i want to calculate the bond strength of anchors is tension. Since I don't have any America code reference, I am using BS8110-1 Clause 3.12.8.4.
ultimate Bond stress, Fbu = β Sqrt(Fcu).
We are using 4000psi Concrete, cylindrical strength f'c= 4000psi = 27.57 Mpa
Since we are using formula from BS, The Fcu Value should be cubic. therefore I will convert my
cylindrical strength to cubic strength
Fcu = f'c / 0.8 = 27.57 /00.8 = 34.46 Mpa. (β = 0.28 for plain bars)
Fbu = 0.28 x Sqrt (34.46) = 1.64 Mpa.
In the procedure ok, kindly advise..
Can anybody suggest any reference for bond stress as per ACI-318..
i want to calculate the bond strength of anchors is tension. Since I don't have any America code reference, I am using BS8110-1 Clause 3.12.8.4.
ultimate Bond stress, Fbu = β Sqrt(Fcu).
We are using 4000psi Concrete, cylindrical strength f'c= 4000psi = 27.57 Mpa
Since we are using formula from BS, The Fcu Value should be cubic. therefore I will convert my
cylindrical strength to cubic strength
Fcu = f'c / 0.8 = 27.57 /00.8 = 34.46 Mpa. (β = 0.28 for plain bars)
Fbu = 0.28 x Sqrt (34.46) = 1.64 Mpa.
In the procedure ok, kindly advise..






RE: Ultimate bond stress of Plan Anchor bars
RE: Ultimate bond stress of Plan Anchor bars
because of this I was trying to use BS formula..
I saw same examples on net, some people provide additional reinformcents equal to anchor capacity around the anchor for all anchors, and they din not check concrete breakout strength as per D.5.2 (tension) and D 6.2 (Shear). however this procedure requires huge amount of reinforcements.
Therefore can we take advantage of the columns reinforcements itself and check, weather these reinforcements will be enough to prevent concrete breakout in tension and shear.
Kindly share your opinion..
RE: Ultimate bond stress of Plan Anchor bars
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.
RE: Ultimate bond stress of Plan Anchor bars