PROFIS ENGINEERING REPORT SHEAR LOAD
Concrete Breakout Failure Mode
Equation ψ h , V
Equation ACI 318-14 Chapter 17 Provision Comments for PROFIS Engineering ψ h , V
=
1.5c a1 ≥ 1.0
h a
17.5.2.8 The modification factor for anchors located in a concrete member where h a < 1.5c a1
, ψ h , V , shall be calculated as ψ h , V
= but ψ h , V shall not be taken less than 1.0 .
1.5c a1 ( 17.5.2.8 )
h a
ψ h , V is a modification factor that is used to account for a concrete member thickness ha that is less than 1.5c a1
. The parameter c a1 corresponds to the distance of an anchor , in the direction of the applied shear load , to the fixed edge for which concrete breakout in shear is being calculated . ψ h , V is always ≥ 1.0 per the provisions of Section 17.5.2.8 . The figure below illustrates the conditions for which ψ h , V would be calculated .
Reference the Variables section of the PROFIS Engineering report for more information on the following parameters :
c a1
:
h a
:
Fixed edge distance in the direction of the applied shear load Concrete thickness
Reference the Calculations section of the PROFIS Engineering report for more information on ψ h , V
.
168 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions