Expansion Bolts: Edge Distance Reduction for Shear
Expansion Bolts: Edge Distance Reduction for Shear
(OP)
Assume an expansion bolt connects something to a concrete foundation wall and is loaded in shear PARALLEL to the wall, with plenty of concrete in either direction parallel to the wall. Assume the expansion bolt is close to the edge of the wall in the PERPENDICULAR direction. Should the recommended shear reduction factor be used, even though the load does not act perpendicular to the wall?
I have always conservatively used the reduction factor in this situation, because I believe expansion bolts resist shear through "shear friction", and a tension cone failure must be avoided, even under shear load. I welcome any comments.
I have always conservatively used the reduction factor in this situation, because I believe expansion bolts resist shear through "shear friction", and a tension cone failure must be avoided, even under shear load. I welcome any comments.
DaveAtkins






RE: Expansion Bolts: Edge Distance Reduction for Shear
Shear capacity reduction may be neglected only in case of 180 degrees angle between the edge and the load.
In your case the angle is 90 degrees and shear capacity reduction factor is to be consiedred.
RE: Expansion Bolts: Edge Distance Reduction for Shear
RE: Expansion Bolts: Edge Distance Reduction for Shear
gosh introduced an interesting idea about 180 degrees. i thought the shear capacity should not take a reduction if the shear is not towards or away from the edge. wouldnt the force 180 degree from the edge cause the bottom of the anchor to "push" toward the edge and thereby reduce the capacity?
just some gut feelings i have...