2.0 SHEAR
2.1 Concrete Breakout Failure Mode
Variables λ a
( continued )
Variables ACI 318-19 Chapter 17 Provision Comments for PROFIS Engineering
λ a
17.7.2 . 2.1 Basic concrete breakout strength of a single anchor in shear in cracked concrete , V b , shall not exceed the lesser of ( a ) and ( b ):
( a ) V b = 7 l e
0.2 d a d λ a
( c a1 ) 1 . 5 ( 17.7.2.2.1a ) a ƒ ́c
……………………………………………………….. ( b ) V b
= 9λ a ƒ ́c ( c a1 ) 1 . 5 ( 17.7.2.2.1b )
17.7.2.2.2 For cast-in headed studs , headed bolts , or hooked bolts that are continuously welded to steel attachments basic concrete breakout strength in shear of a single anchor in cracked concrete , V b
, shall be the lesser of Eq . ( 17.7.2.2.1b ) and Eq . ( 17.7.2.2.2 ) ……………………………………..
V b
= 8 l e
0.2 d a d λ a
( c a1 ) 1 . 5 ( 17.7.2.2.2 ) a ƒ ́c
186 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-19 Provisions