-
(.. )
..
.396-2524
.. (.. ) .. .. .396-2549
..
-
1
. 3962549
1. 1.1
1.2
1.3 1.4
2.
2.1 2.2 2.3 (covering)
2.4 2.5 (coarse aggregate) 4.75 2.6
2.7 (single stirrup)
1 2.8 (spiral stirrup)
2 2.9
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2
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2.10 (total prestress loss) (relaxation)
2.11 28
2.12
2.13 150 300
2.14 150 2.15 (initial prestress in prestressed
reinforcement)
2.16 (effective prestress in prestressed reinforcement)
2.17 (effective prestress in prestressed concrete pile)
2.18 (design bending moment) 30
2.19 2.19.1 B 2.19.2 fc (specified
compressive strength of concrete)2.19.3 fca
(allowable axial stress in compression of concreteat time of
design loads or allowable extreme fiber stress in compression of
concrete at time ofdesign loads)
2.19.4 fci (allowable extreme fiber stress in compression of
concrete at time ofinitial prestress)
2.19.5 fci (compressive strength of concrete at time of initial
prestress)
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3
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2.19.6 fta (allowable extreme fiber stress in tension of
concrete at design load)
2.19.7 fti (allowable extreme fiber stress in tension of
concrete at timeinitial prestress)
2.19.8 fs (specified tensile strengthof prestressing
tendons)
2.19.9 l 2.19.10 L 2.19.11 M -2.19.12 P 2.19.13 w 1
3. 3.1
3 3.1.1 3.1.2 3.1.3
3.2 2
3.2.1 3.2.2
4. 4.1
1 2 3 10 15 25 9.1
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4
. 3962549
1 ( 4.1)
B
B
Y
Y
X X
mm
mm2
S-B x B B AcS-150 x 150 150 22 500S-180 x 180 180 32 400S-220 x
220 220 48 400S-260 x 260 260 67 600S-300 x 300 300 90 000S-350 x
350 350 122 500S-400 x 400 400 160 000S-450 x 450 450 202 500S-525
x 525 525 275 625
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5
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2 ( 4.1)
B
B
D
Y
Y
XX
mm
mm2
SH-B x B B D AcSH-525 x 525 525 300 204 940SH-650 x 650 650 400
296 835
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6
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3 ( 4.1)
4.2 50 9.2
mm
mm2
I-B x B B K N O U V AcI-180 x 180 180 60 75 30 70 55 27 450I-220
x 220 220 65 85 50 80 70 38 600I-260 x 260 260 65 85 90 90 85 48
900I-300 x 300 300 75 105 90 100 100 66 000I-350 x 350 350 85 115
120 120 115 88 000I-400 x 400 400 110 140 120 160 120 124 000I-450
x 450 450 120 160 130 170 140 154 900
U V
B
K N
BO
Y
Y
XX
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7
. 3962549
5. 5.1
5.1.1 .15 1
5.1.2 .566
5.1.2.1 1/3 5.1.2.2 3/4 5.1.2.3 3/4
5.1.3 5.1.3.1 .955.1.3.2 .420
5.1.4 5.1.4.1 : .205.1.4.2 .1945.1.4.3 .747
5.1.5 ()5.1.5.1 : .205.1.5.2 : .24
5.1.6 () .1366
5.1.7 ()5.1.7.1 .5285.1.7.2
.14795.1.7.3
.14995.1.8
5.1.9 ( ) .733
5.1.10 () .841
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8
. 3962549
5.2 5.2.1
5.2.1.1
5.2.1.2 5.2.1.3 ( vibrator ) 5.2.1.4 4
4 ( 5.2.1.4)
Mpa kg/cm2
()fc 35 350fci 25 250fci 0.60 fci 0.60 fcifti 0.251 fci 0.795
fcifca . 0.33 fc 0.33 fc
. 0.45 fc 0.45 fcfta . 0.502 fc 1.59 fc
. 0.372 fc 1.19 fc
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. 3962549
5.2.2 5.2.2.1
5.2.2.2 ...1009 ACI 318 BS 8110 : Part 1 AASHTO HB-17 (1)
(1.1) 0.70 fs
(1.2) 0.74 fs
(2) 2.5 (3) 3
1
5.2.3 5.2.3.1
(1) () 6 60 1
13
-
10
. 3962549
1 ( 5.2.3.1(1))
(2) () 1 1
(3)
5.2.3.2 2 5
5.2.3.3 2 (1) a b d e 1
(2) c B - 50 300
1212
13
-
11
. 3962549
2 ( 5.2.3.2 5.2.3.3)
5 ( 5.2.3.2)
5.2.4 ()
5.2.5 ()5.2.5.1 (collar) 3 50
9 3
e
B
dcba
L
mm
%a 1.5B 0.50b 3.0B 0.20c 0.08d 3.0B 0.20e 1.5B 0.50
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12
. 3962549
3 ( 5.2.5.1)
5.2.5.2
5.2.5.3
5.2.5.4
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13
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5.2.5.5 (neutral axis) 5.2.5.6
2.5
5.2.6 25 30
5.2.7 6.5
6. 6.1
6.1.1 6 3
6.1.2 80 90 500
6.1.3
6.2 6.2.1
6.2.1.1 3 6.2.1.2 2
6.2.2 () 1.5 B
6.3
25 9.3
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14
. 3962549
6.4 9.4.1
4
4 ( 6.4)
6.5 35 40
.409 .1736 1 .1736 2 .1840
6.6 9.4 0.2
6.7 ()
9.5 0.2
l360
l
-
15
. 3962549
7. 7.1
500 (1) (2) (3) (4)
8. 8.1 .
9. 9.1
9.1.1 1
9.1.2
9.1.3
9.2 9.2.1
1 9.2.2
9.2.3
9.3 9.3.1
0.5 9.3.2
9.3.3
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16
. 3962549
9.4 9.4.1
9.4.1.1 2 5
5 2 ( 9.4.1.1)
9.4.1.2 6
6 ( 9.4.1.2)
25 L
25 L
0.5 L
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17
. 3962549
9.4.1.3 7
7 ( 9.4.1.3)
9.4.1.4 2 8
8 2 ( 9.4.1.4)
9.4.2 30
9.4.3
25 L
25 L
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18
. 3962549
9.5 9.5.1
2 9
9 ( 9.5)
9.5.2
1.1M - 0.025wL2
(0.15L - 0.25)9.5.3
9.5.2 9
9.5.4
P =
25
L
0.3 L0.3 L
0.5 0.5
(P)
25
-
19
. 3962549
.
( 8.1)
.1 28 90
.2
.2.1 .2.1.1 10
100 .2.1.2
(1) 10 6.5
(2) 1 6.5 85 10 1.05
(3) 1 6.5 85 1 6.5 85 10 1.05 6.5 2
.2.2
.2.2.1 3 .2.2.2 4. 5.2.2 5.2.3 5.2.4 6.1 6.2 6.3
6.4 6.6 .2.3 .2.3.1 2 1 .2.3.2 5.2.5 6.7
.3 .2.1.2 .2.2.2 .2.3.2
