Civil Engineering Reference
In-Depth Information
SOLUTION
1.
Is the wall thickness satisfactory?
c
hd
V
u
10
f
(ACI Section 11.10.3)
(ACI Section 11.10.4)
d
0.8
w
(0.8)
(12
10)
96
V
u
(0.75)(10)(
3000)(8)(96)
V
u
315,488 lb
315.5 k
240 k
OK
2.
Compute
V
c
for wall (lesser of two values):
c
hd
N
u
d
(a)
V
c
3.3
f
4
w
(3.3
3000)(8)(96)
0
(ACI Equation 11-29)
138,815 lb
138.8 k
k
c
0.2
N
u
/
w
h
)
M
u
V
u
c
w
(1.25
f
(b)
V
c
0.6
f
hd
(ACI Equation 11-30)
w
2
Computing
V
u
and
M
u
at the lesser of
w
/2
10/2
5
or
h
w
/2
14/2
7
from base (ACI
11.10.7):
V
u
240 k
M
u
240(14
5)
2160 ft- k
25,920 in.- k
(12
10)(1.25)(
3000)
0
25,920
240
V
c
0.6
3000
(8)(96)
(12)(10)
2
156,692 lb
156.7 k
3.
Is shear reinforcing needed?
V
c
2
(0.75)(138.8)
2
52.05 k
240 k
Yes
4.
Select horizontal shear reinforcing:
V
u
V
c
V
s
V
u
V
c
A
v
f
y
d
s
2
A
v
s
2
V
u
V
c
240
(0.75)(138.8)
(0.75)(60)(96)
0.0315
f
y
d
