PROFIS ENGINEERING REPORT TENSION LOAD
Bond Failure Mode
Results N a
Results ACI 318-14 Chapter 17 Provision Comments for PROFIS Engineering
N a
= A Na ψ ed , Na ψ cp , Na
N ba
A Na0
17.4.5.1 The nominal bond strength in tension , N a of a single adhesive anchor …….. shall not exceed : ( a ) For a single adhesive anchor
N a
= A Na ψ ed , Na ψ cp , Na
N ba
( 17.4.5.1a )
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 318-14 Chapter 17 Provision Comments for PROFIS Engineering
ϕN a
17.3.1.1 The design of anchors shall be in accordance with Table 17.3.1.1 . In addition , the design of anchors shall satisfy 17.2.3 for earthquake loading and 17.3.1.2 for adhesive anchors subject to sustained tensile loading
Table 17.3.1.1 Failure Mode Bond Strength of Adhesive Anchor in Tension
Single Anchor
ϕN a
≥ N ua
ACI 318-14 strength design provisions for tension check a calculated design strength ( ϕN N
) against a factored tension load ( N ua
).
Reference the Equations section of the PROFIS Engineering report for more information on :
ϕ Na
: 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 318-14 Provisions