PROFIS Design Guide: US-EN Summer 2021 | Page 370

HILTI PROFIS ENGINEERING 3.0.44

Adhesive anchor group
Example PROFIS Engineering Report for an adhesive anchor group
Group calculations are for N cbg , N ag
, V cbg
, and V cpg
2 Load case / Resulting anchor forces
Load case : Design Loads
Anchor reactions [ lb ] Tension force : (+ Tension , -Compression )
Anchor Tension force Shear force Shear force x Shear force y 1 5,000 250 250 0 2 5,000 250 250 0 3 5,000 250 250 0 4 5,000 250 250 0
max . concrete compressive strain :
- [ 0 / 00 ]
max . concrete compressive stress :
- [ psi ]
resulting tension force in ( x / y )=( 0.000 / 0.000 ):
20,000 [ lb ]
resulting compression force in ( x / y )=( 0.000 / 0.000 ):
0 [ lb ]
Anchor forces are calculated based on the assumption of a rigid anchor plate .
3 Tension Load
Load N ua [ lb ]
Capacity ϕN n [ lb ]
Utilization β N = N ua
/ ϕN n
Status
Steel Strength *
5,000
26,437
19
OK
Bond Strength **
20,000
40,774
50
OK
Sustained Tension Load Bond Strength *
4,500
14,038
33
OK
Concrete Breakout Failure **
20,000
42,756
47
OK
* highest loaded anchor ** anchor group ( anchors in tension )
3.1 Steel Strength
N sa
=
ICC-ESR value refer to ICC-ESR-3187
ϕN sa
≥ N ua
ACI 318-14 Table 17.3.1.1
Variables
Calculations
Results
A se
[ in 2 ]
f uta
[ psi ]
0.61
58,000
N sa
[ lb ]
35,130
N sa
[ lb ]
ϕ steel
ϕ nonductile
ϕN sa
[ lb ]
N ua
[ lb ]
35,130
0.750
1.0
26,347
5000
Input data and results must be checked for conformity with the existing conditions and for plausibility ! * PROFIS Engineering ( c ) 2003-2018 Hilti AG , FL-9494 Schaan Hilti is a registered Trademark of Hilti AG , Schaan
370 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions