PROFIS ENGINEERING REPORT TENSION LOAD
Bond Failure Mode
.
Equations A Na0
Equations ACI 318-14 Chapter 17 Provision Comments for PROFIS Engineering
A Na0
= ( 2c Na
) 2
17.4.5.1 …….. A Na0 is the projected influence area of a single adhesive anchor with an edge distance equal to or greater than c Na
.
A Na0
= ( 2c Na ) 2 ( 17.4.5.1c )
A Na0 is a modification factor that accounts for the area of influence assumed to develop in concrete , with respect to bond failure , when a tension load is applied to a single anchor without the influence of any fixed edges . A Na0 is calculated with the parameter “ c Na
”, which is defined in ACI 318-14 Chapter 2 as the “ projected distance from the center of an anchor shaft on one side of the anchor required to develop the full bond strength of a single adhesive anchor .” c Na is a calculated value , and is calculated per ACI 318-14 Equation ( 17.4.5.1d ). The geometry for
A Na0 is defined by a projected distance of cNa from the anchor in the x and y directions .
The figure below illustrates how A Na0 is calculated .
A Na0
= ( c Na + c Na
) ( c Na + c Na
)
= ( 2.0c Na
) 2
Reference the Equations and Calculations section of the PROFIS Engineering report for more information on c Na
.
Reference the Calculations section of the PROFIS Engineering report for more information on A Na0
.
12 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions