PROFIS Design Guide: US-EN Summer 2021 | Page 167

PROFIS ENGINEERING REPORT SHEAR LOAD

Concrete Breakout Failure Mode

Equation ψ _{ed , V}

( continued )

Equation ACI 318-14 Chapter 17 Provision Comments for PROFIS Engineering ψ _{ed , V}

= 0.7 + 0.3 c _{a2 ≤1 . 0}

1.5c _a1

If more than one fixed edge perpendicular to the direction of the applied shear load exists , the smallest of these edge distances is used to calculate ψ _{ed , V}

. For the application in the illustration below , if c _{a2 , x-}

< c _{a2 , x +} : ψ _{ed , V}

= 0.7 + 0.3 ( c _{a2 , x-}

/ 1.5c _a1 )

Per Section 17.5.2.4 , when anchoring into a narrow section , the checks noted in ( a ) through ( c ) should also be made to determine if a modified c _a1

-value should be used for the shear concrete breakout calculations . For the application below , h _a is greater than 1.5c _a1 , so no modified c _a1

-value would be calculated .

Reference the Variables section of the PROFIS Engineering report for more information on the following parameters :

c _a1

:

c _a2

:

h _a

:

Fixed edge distance in the direction of the applied shear load

Fixed edge distance perpendicular to the direction of the applied shear load

Concrete thickness

Reference the Calculations section of the PROFIS Engineering report for more information on ψ _{ed , V}

.

167 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions