1.0 TENSION
1.1 Bond Failure Mode
Results N a
Results ACI 318-19 Chapter 17 Provision Comments for PROFIS Engineering
N a
= A Na ψ ed , Na ψ cp , Na
N ba
A Na0
17.6.5.1 Nominal bond strength in tension , N a of a single adhesive anchor …….. shall be calculated by ( a )………….. ( a ) For a single adhesive anchor
|
N a
=
A
|
Na ψ ed , Na ψ cp , Na
N ba
|
( 17.6.5.1a ) |
|
A Na0
|
|
ACI 318 anchoring-to-concrete provisions for the nominal bond strength of a single anchor ( N a
) require calculation of various modification factors corresponding to area of influence ( A Na
/ A Na0 ), edge distance ( ψ ed , Na
), and splitting
( ψ cp , Na
); and then multiplying these factors by what is termed the “ basic bond strength in tension ” ( N ba
) to obtain a “ nominal bond strength in tension ” ( N a
).
Reference the Calculations section of the PROFIS Engineering report for more information on the following parameters :
A Na
: area of influence for anchors in tension
A Na0
: area of influence for single anchor in tension
ψ ed , Na
: tension modification factor for edge distance
ψ cp , Na
: modification factor for splitting
N ba
: basic bond strength in tension
Reference the Equations section of the PROFIS Engineering report for more information on N a
.
Results ϕN a
Results ACI 318-19 Chapter 17 Provision Comments for PROFIS Engineering
ϕN a
17.5 . 2 For each applicable factored load combination , design strength of anchors shall satisfy the criteria in Table 17.5.2 .
ACI 318-19 strength design provisions for tension check a calculated design strength ( ϕN N
) against a factored tension load ( N ua ).
Table 17.5.2 Failure Mode Bond Strength Adhesive Anchor in Tension
Single Anchor
ϕN a
≥ N ua
Reference the Equations section of the PROFIS Engineering report for more information on : ϕN a
: design bond strength in tension
Reference the Results section of the PROFIS Engineering report for more information on the following parameters :
ϕ bond
: strength reduction factor for bond failure
ϕ seismic
: strength reduction factor for seismic tension
N a
: design bond strength in tension
N ua
: factored load acting on anchors in tension
A summary of calculated tension design strength versus the factored tension load for each tension failure mode relevant to the application is given in Part 3 Tension Load of the PROFIS Engineering report .
41 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-19 Provisions