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Bold Design for simply supported bens in bending

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GoncaloPT

Structural
Jun 9, 2020
24
Hi everyone!
Hope you are all doing great.

Recently, I have to design some bolt connection between two steel profiles for a simply supported beam, and I'm having some troubles on how to get the shear for the bolts conecting the steel profiles.
The bolts are intended to be bolted with a 500 mm spacing between them. I've attached some schemes of the problem below.

Capturar_rynhef.png
Capturar2_ox8aa0.png


I remember some formulas for shear across the sections like

Tau= (V*Q)/(I*t)

but could someone please advise on how to properly apply this for this problem?

Any help will be much appreciated.

Thank you.
 
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Will you take friction into account or will you rely only on bolt shear resistance?
Tau = force / area with a FoS of 150% will yield same results as your formula, with some caveats. Difference is this averages out the stress, yours works for a parabolic stress distribution. I wouldn't dig too deep here and simply oversize the bolts.

BUT without more information, I'd say that set-up is a bit... sketchy to say the least.
 
You will want to consider deflection as well if the bolts are not designed as slip critical. Bearing bolts taking up slack in clearance bolt holes will have a significant affect on deflection.
 
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