ABCDEFGHIJKLMNOPQRSTUVWXYZAA
1
2
PROJECT :
PAGE :
3
CLIENT :
DESIGN BY :
4
JOB NO. :
DATE :
REVIEW BY :
5
Flush Wall Pilaster Design Based on ACI 530-05 & IBC 06
6
INPUT DATA & DESIGN SUMMARY
7
SPECIAL INSPECTION ( 0=NO, 1=YES )
1Yes< ==
This option only for local jurisdiction amendments to the code, not part of ACI 530-05 (IBC 06 & CBC 07).
8
TYPE OF MASONRY ( 1=CMU, 2=BRICK )
1CMU
9
MASONRY STRENGTH
fm'=1,5ksi
10
REBAR YIELD STRESS
fy=60ksi
11
ALLOWABLE INCREASING ? (IBC/CBC 1605.3.2)Yes
12
SEISMIC DESIGN CATEGORY (5=Gravity)
3D
13
SERVICE AXIAL LOAD
P=50
k, at pilaster center
14
SERVICE SHEAR LOAD
V=9,5
k, (may be negative)
15
SERVICE MOMENT
M=8,2
ft-k, (posite or negative)
16
SECTION DIMENSIONS (in)
17
inputeffective
18
t =8te =7,63
19
D =24d =23,63
20
L =48Le =48,00
21
B =24b =23,63
22
R =80Re =48,00
23
24
WALL PILASTER HEIGHT
h=15ft
25
VERTICAL REINF. (EACH SIDE)
2#8
DISTANCE PILASTER REINF.
a =19,13in
26
HORIZ. TIES
2
legs #
4@8in o.c.
(ACI 530, 1.13.3.5)
27
28
WALL GROUTED ? (Yes, No)
No
, (only pilaster grouted)
[THE WALL PILASTER DESIGN IS ADEQUATE.]
29
30
ANALYSIS
31
TOTAL REINFORCEMENT AREA
As=3,16in2
MODULAR RATIO
n=21,48
32
TOTAL EFFECTIVE AREA
An=798in2
PILASTER REINF. RATIO
r=0,006
33
NEUTRAL AXIS FROM WALL FACE
yt=9in
ALLOWABLE STRESS FACTOR
SF=1,333
34
NET MOMENT OF INERTIA
In=39198in4MAX. TIES SPACING (ACI 1.1.4.6)Smax=8in
35
RADIUS OF GYRATION
r=7,01in
36
MASONRY ELASTICITY MODULUS
Em =1350ksi
TRANSFORMED WALL PILASTER AREA
37
STEEL ELASTICITY MODULUS
Es =29000ksi931in2
38
CHECK VERTICAL REINFORCEMENT LIMITATION OF PILASTER (ACI 530, 2.1.6.4)
39
As =3,16in2>
0.0025 bd =
1,40in2
[Satisfactory]
40
<
0.04 bd =
22,34in2
[Satisfactory]
41
ALLOWABLE STRESS DUE TO AXIAL LOAD ONLY
AXIAL STRESS AT MIDHEIGHT OF THE PILASTER
42
43
0,483ksi0,060ksi
44
45
[for h/r < 99]
< Fa, [Satisfactory]
46
ALLOWABLE STRESS DUE TO FLEXURE
ALLOWABLE REINF. STRESS DUE TO FLEXURE
47
48
0,660ksi32,0ksi
49
50
TOTAL MOMENT ACTING AT MIDHEIGHT
TRANSFORMED MOMENT OF INERTIA
51
52
13,1ft-kips51330in4
53
54
STRESS IN THE EXTREME FIBER DUE TO MT
MAX.STRESS COMBINED AXIAL & FLEXURE
55
56
0,029ksi0,089ksi
57
< fa, [Satisfactory, the section is uncracked]
< Fb, [Satisfactory]
58
59
MAX. REINF. STRESS COMBINED AXIAL & FLEXURE
AXIAL LOAD AT BASE OF THE WALL PILASTER
60
61
3,6ksi61,227k
62
< Fs, [Satisfactory]
63
64
ALLOWABLE AXIAL LOAD FOR AXIAL COMPRESSION ONLY
65
66
449,26k
> Pt, [Satisfactory]
67
[for h/r < 99]
68
69
SHEAR DESIGN DETERMINED FROM THE FOLLOWING EXPRESSION
70
71
<51,64psi
72
73
=17psi
[Satisfactory]
74
75
(Sec. 2.3.5.2.1)
<154,92psi
[Satisfactory]
76
77
78
0,15
in2 / ft
<0,60in2 / ft
( No shear reinf. Reqd )
79
80
81
82
83
84
LICENSE NUMBER: ?????
85
86
www.Engineering-International.com
87
88
89
90
91
92
93
94
95
96
97
98
99
100