Product Technical Guides : US-EN Post-Installed Rebar Guide - Page 36

Post-Installed Reinforcing Bar Guide
6.0 WHAT ’ S THE BACK STORY ?
f c , vf
=
5 ‧ f bu ‧ l e
‧ A vf 5 ‧ 1090 ‧ 12 ( 0.625 ) ‧ 0.31 =
= 106 psi d b
‧ A c 0.625 ‧ 192 f c , vf
= f y x A vf 60000 x 0.31 =
= 97 psi ← controls 192
A c f
= 0.33 [( f l c ) 2 ‧ ( f c , vf
+ f ext )] 1 / 3 = 0.33 [( 4000 ) 2 ‧ ( 97 + 0 )] 1 / 3 = 382 psi d
2
1.3 ‧ n ‧ d b f l
= f 1.3 ‧ 1 ‧ ( 0.625 ) 2 4000 ‧ 60000
c y
= = 41 psi
A c
192
V n
= A c ( β f
f
+ β d
d
) = 192 ( 0.2 ‧ 382 + 0.75 ‧ 41 ) = 20573 lb . ϕv n
=
0.75 ‧ 20573 192
= 80 lb . / in 2 > 63 ∴ ok
Use # 5 hooked dowels embedded 7-1 / 2 inches ( 12d b ).
34 2021