2.0 SHEAR
2.5 Steel Failure with Lever Arm
Equations α M
( continued )
Equations ETAG 001 Annex C Provision Comments for PROFIS Engineering
α M
5.2.3.2 Steel failure b ) Shear load with lever arm
The characteristic resistance of an anchor , V Rk , s , is given by Equation ( 5.5 ).
Likewise , per ETAG 001 Section 4.2.2.4 and Table 4.1 , full rotational restraint should not be assumed if the hole clearance between the anchor element and fixture is significant . where
V Rk , s
= α M M Rk , s [ N ] ( 5.5 ) l α M
= see 4.2.2.4 l = lever arm according to Equation ( 4 . 2 )
M Rk , s
= M 0 ( 1 - N / N ) [ Nm ] ( 5 . 5a )
Rk , s Sd Rd , s
PROFIS Engineering modifies ETAG 001 Equation ( 5.5 ) to use the following nomenclature :
ϕV s
M
= ϕ α M
M s
L b
PROFIS Engineering users can input any α M
-value between 1.0 ( no rotational restraint ) and 2.0 ( full rotational restraint ) corresponding to the amount of fixture rotational restraint that exists for their stand-off application .
Reference the Calculations section of the report for more information on the following PROFIS Engineering parameters .
M s
: internal bending resistance
L b
: internal lever arm .
Reference the Results section of the report for more information on the following PROFIS Engineering parameters .
V sM
: nominal shear strength for bending
фV sM
: nominal shear strength for bending where : “ фV sM ” corresponds to “ V Rk , s
”
“ M s ” corresponds to “ M Rk , s
”
“ L b
” corresponds to “ ” “ ф ” is a strength reduction factor for steel failure
316 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-19 Provisions