Anchor Bolt anchorage

Rating:
10

Description


Designing anchor reinforcement in concrete pedestals, where un-reinforced concrete is insufficient to resist anchor forces. Anchor reinforcement consists of longitudinal rebar and ties to carry anchor tension forces and shear forces, respectively.

Even though the Appendix D of the ACI 318-05 permits the use of supplementary reinforcement to restrain concrete breakout, it does not provide specific guidelines in designing such reinforcement. This paper presents a method for designing anchor reinforcement in concrete pedestals, where un-reinforced concrete is insufficient to resist anchor forces. Anchor reinforcement consists of longitudinal rebar and ties to carry anchor tension forces and shear forces, respectively. The Strut-and-Tie Model is proposed to analyze shear force transfer from anchors to pedestal and to design the required amount of shear reinforcement. A proposed design procedure is illustrated in an example problem.

Calculation Reference
Bolt
Anchor Bolt
ACI 318-05

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Submitted On:
21 Aug 2013
File Size:
389.86 Kb
Downloads:
675
File Version:
1.1
File Author:
Mike Jones
Rating:
10

 
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Comments: 3
yosso 7 years ago

I appreciate the feedback, but I usually check ACI Appendix D for shear and ignore the contribution from the ties.
Thusly, I've never felt the need to "complete" the worksheet.
Feel free to continue and expand.
bm212 7 years ago
The Spreadsheet ends where it calculates the Allowable Force provided by the Hook.
The Example given in the PDF document shows how to design the ties and hairpins
Therefore it seems that the program is not complete
JohnDoyle[Admin] 8 years ago
Fantastic worksheet Mike well done. I have added 6 month to your XLC Pro subscription by way of thanks.