Bolts in Bearing and Shear

[priya15]

Engineers, If I have a beam sitting on top of column with four bolts that are in bearing and take shear (no uplift in my case), should I just check bolts capacity in bearing and shear separately based on AISC tables or is there an interaction that I need to worry about? I know I need to consider shear/tension interaction ration if I have tension. but if I only have compression and shear, should I still use the interaction ratio in calculating capacities of bolt assembly?

 

[KootK]

I think there may be some confusion regarding terminology here. It's pretty rare to have bolts being utilized in compression in steel to steel connections. I'm guessing that you really have some bolts that are being sheared and some parent material that is receiving bearing stresses. As those are two different elements, no interaction is required.

Obviously, I'm making assumptions here about your actual condition. If you post a sketch of what's going on, we can likely supply more meaningful recommendations.

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.

 

[rb1957]

if the joint is in compression, that's usually carried by the joint faces (bearing against one another) and not by the bolt. So if you've got shear and compression, size the fastener for shear.

If you've got tension and shear, then you have to apply the interaction.

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