ABCDEFGHIJKLMNOPQRSTUVWXYZAAABACADAEAFAGAHAI
1
2
PROJECT :
PAGE :
3
CLIENT :
DESIGN BY :
4
JOB NO. :
DATE :
REVIEW BY :
5
Pipe Concrete Column Design Based on ACI 318-05
6
7
INPUT DATA & DESIGN SUMMARY
8
CONCRETE STRENGTH
fc'=5ksi
9
REBAR YIELD STRESS
fy=60ksi
10
COLUMN OUTSIDE DIAMETER
D=20in
11
CONCRETE WEB THICKNESS
T=7in
12
FACTORED AXIAL LOAD
Pu=480k
13
FACTORED MAGNIFIED MOMENT
Mu=200ft-k
14
FACTORED SHEAR LOAD
Vu=20k
15
COLUMN VERT. REINFORCEMENT
8#7
16
LATERAL REINF. OPTION (0=Spirals, 1=Ties)
1
Ties
17
LATERAL REINFORCEMENT
#4@12
in o.c.
18
19
THE COLUMN DESIGN IS ADEQUATE.
20
21
ANALYSIS
22
23
24
25
26
27
28
f Pn (k)
29
30
f Pn (kips)f Mn (ft-kips)
31
AT AXIAL LOAD ONLY
8820
32
AT MAXIMUM LOAD
88275
33
AT 0 % TENSION
693159
34
AT 25 % TENSION
574194
35
AT 50 % TENSION
478212
36
AT e t = 0.002
343222
37
f Mn (ft-k)
AT BALANCED CONDITION
313208
38
AT e t = 0.005
146229
39
AT FLEXURE ONLY
0164
40
CHECK FLEXURAL & AXIAL CAPACITY
41
f Pmax =0.85 f [ 0.85 fc' (Ag - Ast) + fy Ast] =
882.1535205
kips., (at max axial load, ACI 318-05, Sec. 10.3.6.1)
42
wheref = 0.70
(ACI 318-05, Sec.9.3.2.2)
>Pu
[Satisfactory]
43
Ag =286in2.Ast =4.80in2.
44
a = Cbb1 =8
in (at balanced strain condition, ACI 10.3.2)
45
f =
0.7 + ( et - 0.002 ) (200 / 3), for Spiral
=0.656(ACI 318-05, Fig. R9.3.2)
46
0.65 + ( et - 0.002 ) (250 / 3), for Ties
47
where
Cb = d ec / (ec + es) =
10inet =0.002069ec =0.003
48
d =17.5625
in, (ACI 7.7.1)
b1 =0.8
( ACI 318-05, Sec. 10.2.7.3 )
49
f Mn = 0.9 Mn =
164
ft-kips @ Pn = 0, (ACI 318-05, Sec. 9.3.2) ,& et,min = 0.004, (ACI 318-05, Sec. 10.3.5)
50
f Mn =211
ft-kips @ Pu =
480
kips
>Mu
[Satisfactory]
51
rmax=0.08
(ACI 318-05, Section 10.9)
rprovd=0.017
52
rmin=0.01
(ACI 318-05, Section 10.9)
[Satisfactory]
53
54
CHECK SHEAR CAPACITY
55
f Vn = f (Vs + Vc) =
49
kips, (ACI 318-05 Sec. 11.1.1)
56
>Vu
[Satisfactory]
57
wheref =0.75
(ACI 318-05 Sec. 9.3.2.3)
58
A0 =214in2.
Av =
0.40in2.fy =60ksi
59
Vc =
2 (fc')0.5A0 =
30.3
kips, (ACI 318-05 Sec. 11.3.1)
60
Vs =
MIN (d fy Av / s , 4Vc) =
35.1
kips, (ACI 318-05 Sec. 11.5.6.2)
61
smax=14
(ACI 318-05, Section 7.10.5.2)
sprovd=12in
62
smin=1
[Satisfactory]
63
64
65
66
67
68
LICENSE NUMBER: ?????
69
70
www.Engineering-International.com
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100