COMBINED TENSION AND SHEAR LOAD
Tri-Linear
Variables β N
( continued )
Variables ACI 318-19 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 : β N
= N ua ( i ) / ϕ steel
N sa pullout strength : β N
= N ua ( i ) / ϕ concrete
N pn , ƒ ́c concrete breakout strength : β N = N ua ( i )
/ ϕ concrete
N cb or β N = N ua ( g )
/ ϕ concrete
N cbg post-installed adhesive anchor steel strength : β N
= N ua ( i ) / ϕ steel
N sa bond strength : β N
= N ua ( i ) / ϕ bond
N a or βN = N ua ( g ) / ϕ bond
N ag sustained tension load ( for bond strength ): β N
= N ua ( i ) / 0.55ϕ bond
N ba concrete breakout strength : β N = N ua ( i )
/ ϕ concrete
N cb or β N = N ua ( g )
/ ϕ concrete
N cbg cast-in anchor steel strength : pullout strength : β N
= N ua ( i ) / ϕ steel
N sa β N
= N ua ( i ) / ϕ concrete
N pn , ƒ ́ concrete breakout strength : β N = N ua ( i )
/ ϕc oncrete
N cb or β N = N ua ( g )
/ ϕ concrete
N cbg side-face blowout strength : 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 corresponds to the total factored tension load acting on a group of anchors .
352 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-19 Provisions