Example of Concrete Anchor Bolt Design Calculation – Part-8: Interaction of Tensile and Shear Forces

In this part of the concrete anchor bolt design calculation example we will see the interaction of tensile and shear forces for the structural cast in place foundation anchor bolt of the column. Please refer the Figure-1 and 2 of the Part-1 of this anchor design series.

What the ACI 318 Codes says

If, the factored shear load (2300 lb in our case, refer part-1) > 0.2* design strength in shear (10821.297 lb in our case, refer part-7)

And, the factored tensile load (20000 lb in our case, refer part-1) > 0.2* design strength in tension (20694.6131 lb in our case, refer part-4)

Then,

(factored shear load / design strength in shear) + (factored tensile load /design strength in tension) <=1.2…………………..eq.8

For our case, the left hand side of the eq.8 becomes:

(2300/10821.297) + (20000/20694.613) = 1.181, which is less than 1.2, so, we can conclude that the anchor bolt design is safe under the interaction of tensile and shear forces.

Shibashis Ghosh

Hi, I am Shibashis, a blogger by passion and engineer by profession. I have written most of the articles for mechGuru.com. For more than a decades i am closely associated with the engineering design/manufacturing simulation technologies.
Disclaimer: I work for Altair. mechGuru.com is my personal blog. Although i have tried to put my neutral opinion while writing about different competitor's technologies, still i would like you to read the articles by keeping my background in mind.

2 Replies to “Example of Concrete Anchor Bolt Design Calculation – Part-8: Interaction of Tensile and Shear Forces”

1. rob says:

this is so helpful! thanks so much for the time and effort you put into making this clear and easy to follow. i’m very grateful for your effort…i’ve been a practicing structural engineer for about a decade and haven’t needed to prove the pull-out strength of anchor bolts in concrete in that whole time, but now have to demonstrate to a plan checker that my design meets code.

so i’m a little bit rusty, and a lot appreciative of your posting. cheers!

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