PART 4 SHEAR LOAD
Pryout Failure Mode ( Pryout Bond )
Equation ψ ec , Na
( continued )
Equation 318-14 Chapter 17 Provision Comments for PROFIS Engineering
ψ ec , Na
=
1
1 + e ́N c Na
If shear eccentricity exists in more than one direction , PROFIS Engineering calculates a ψ-modification factor for each direction using Eq . ( 17.4.5.3 ). PROFIS Engineering designates the ψ-modification factor for eccentricity in the x-direction “ ψ ec1 , Na
”, and the ψ-modification factor for eccentricity in the y-direction “ ψ ec2 , Na
”. Per Section 17.4.5.3 , PROFIS Engineering uses the product of these modification factors in Eq . ( 17.4.5.1b ) to calculate the pryout parameter ( N cpg
) per Eq . ( 17.5.3.1b ) when shear eccentricity exists in both the x and y directions .
Reference the Variables section of the PROFIS Engineering report for more information on the following parameters :
e c1 , N
: Parameter for shear eccentricity with respect to the x direction
e c2 , N
: Parameter for shear eccentricity with respect to the y direction
Reference the Calculations section of the PROFIS Engineering report for more information on the following parameters :
c Na
: Edge distance parameter for adhesive anchors
ψ ec1 , Na
: Modification factor for shear eccentricity with respect to the x direction
ψ ec2 , Na
: Modification factor for shear eccentricity with respect to the y direction
214 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions