In: Civil Engineering
For an edge flat panel, given that Vu=160 k , slab thickness = 10 in, d = 9 in, fc'= 3000 psi , fy = 60000 psi, column dimensions 24 x 24 in . Answer the following questions : a- Is shear reinforcement required ? (show your calculations) b- Will shear reinforcement solve the problem ? (show your calculations) c- Determine the parameter required to resist the given ultimate shear load then find a . d- Determine the stirrups spacing S . e- Determine the number of stirrups .
shear strength of requried=Vn
Vu = 160k
Vn= 160/0.75 = 213.33k
shear strength of concrete =Vc
compare Vc and Vn
VC < Vn as 23.6 < 213.33k
therefore shear reinforcement is required
Vs1 =Vn -Vc
assume 2 legs Av = 2 (,11) =0.22 in2
spacing of stirrup = s
use 4 bar 2 legged striupp @ 4 in
ACI max spacing = max of( d/2 or 24 inch) = 4.5 inch or 24 inch
use 4 bar 2 legged striupp @ 4 in
s max = 24 inch so 1 inch provided is ok
ACI min steel max=
number of stirrup per feet = 12 number of stirrup