COMBINED TENSION AND SHEAR LOAD
Tri-Linear
Variables Utilization β N
( continued )
Variables 318-14 Chapter 17 Provision Comments for PROFIS Engineering
β N
The PROFIS Engineering anchor portfolio includes post-installed mechanical anchors , postinstalled adhesive anchors , and cast-anchors . The following tension failure modes are considered for each type of anchor :
post-installed mechanical anchor steel strength : pullout strength : concrete breakout strength :
post-installed adhesive anchor steel strength : bond strength : sustained tension load β N
= N ua ( i ) / ϕ steel
N sa β N
= N ua ( i ) / ϕ concrete
N pn , f ́c β N
= N ua ( i ) / ϕ concrete
N cb or β N = N ua ( g )
/ ϕ concrete
N cbg β N
= N ua ( i ) / ϕ steel
N sa β N
= N ua ( i ) / ϕ bond
N a or β N = N ua ( g )
/ ϕ bond
N ag
( for bond strength ): β N = N ua ( i )
/ 0.55ϕb ond
N ba concrete breakout strength : β N
= N ua ( i ) / ϕ concrete
N cb or β N = N ua ( g )
/ ϕ concrete
N cbg
Example : 3 Tension load
Load N ua [ lb ]
Capacity ϕN n [ lb ]
Utilization
β N
= N ua / ϕN n
Status
Steel strength * 10,000 26,347 38 OK Bond strength **
Sustained tension load bond strength *
Concrete breakout Failure **
* highest loaded anchor ** Anchor group ( anchors in tension )
40,000 33,922 118 not recommended
5,000 11,495 44 OK
40,000 26,603 151 not recommended
Reference the PROFIS Engineering design guide section on β V for additional information about PROFIS Engineering interaction calculations . cast-in anchor steel strength : pullout strength : concrete breakout strength : side-face blowout strength : β N
= N ua ( i )/ ϕ steel
N sa β N
= N ua ( i ) / ϕ concrete
N pn , f ́c β N
= N ua ( i ) / ϕ concrete
N cb or β N = N ua ( g )
/ ϕ concrete
N cbg β N
= N ua ( i ) / ϕ concrete
N sb or β N = N ua ( g )
/ ϕ concrete
N sbg where N ua ( i ) corresponds to the highest factored tension load acting on an individual anchor and
N ua ( g ) corresponds
361 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-14 Provisions