ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
2
3
4
University of Engineering and Technology Lahore, Pakistan
5
6
7
8
Bsc. Project
Analysis and Design of Prestressed Structural members
9
Project advisior
Dr. Mohammad Afzal Javaid
10
Engr. Azhar Saleem
11
Sheet Title
Analysis and Design of post-tensioned Felexural members
12
Sheet Authers
Fahed Javaid 2002-C-1009
13
Waheed Ahmed 2002-C-1006
14
Ayyaz A hmed 2002-C-1023
15
Ferhan Nawaz 2002-C-969
16
* Only yellow Fields are to be Entered by the user
17
PROPERTIES OF SECTION DESCRIBED BY LAYERS (FROM TOP TO BOTTOM)
18
Units:in
19
1 IN = 25 MM
20
Layer No.Top WidthBottom WidthThicknessDepth (h)36365.2
21
112125036162.8
22
2441451684
23
312125198854
24
4082410
25
5024248
26
60
27
70
28
80
29
90
30
100
31
110Elastic Section Properties
32
120Height =24.00in
33
130Area =176.00in^2
34
140Ix =11994.67in^4
35
150Yt =12.000in
36
160Yb =12.000in
37
170St =999.56in^3
38
180Sb =999.56in^3
39
190Iy =1514.67in^4
40
200
41
210
42
220
43
230
44
240
45
250
46
260
47
270
48
280
49
290
50
300
51
310
52
320
53
330
54
340
55
350
56
360
57
370
58
59
60
Material Properties
61
62
Concrete:
Prestress Wire:
63
fc':4000Psifpu:250000Psi
64
gc:150Pcf%Loss:15%
65
wire dia:0.5in
66
wire area:0.153in2
67
Pe/Pi, R:85%
68
69
Permissible Concrete Stresses:
70
71
Initial Stage:
72
fc':0.7 x 4000 =2800Psi
73
Top, fti:
3 x (2800)^0.5 =
158.7Psi
74
Bottom, fci:
- 0.6 x 2800 =
-1680.0Psi
75
Service Stage:
76
Top, fcs:
- 0.6 x 4000 =
-2400.0Psi
77
Bottom, fts:
3 x (4000)^0.5 =
189.7Psi
78
79
Permissible Stress in Prestress wire:
80
81
(immediately after transfer)
82
fpy:
0.9 x 250000 =
225000Psi
83
0.70 fpu:
0.70 x 250000 =
185000Psi
84
85
Permissible stress:
185000Psi
86
87
Load and Moments:
88
89
span, L:40ft
90
self, wo:
176/144 x 150/1000 =
0.18klf
91
Imposed DL, wd:
0.275klf
92
LL, wl:0.275klf
93
94
Mo:
0.18 x 40^2/8 =
36ft-kip
95
Md:
0.275 x 40^2/8 =
55ft-kip
96
Ml:
0.275 x 40^2/8 =
55ft-kip
97
98
Section Moduli, required at midspan:
99
100
(1-R)Mo+Md+Ml:
(1-0.85)36+55+55 =
115.4ft-kip