psf (. . 6.1). , . , (1-1), (2-2) (3-3).
li:
.
zb = 0,9 h 0. :
,
400 (-III) Rs = 36,5 / 2.
. 6.1.
6.1
i | ai | h 0, i | li c | Mi × | As,i 2 |
56,5 | 15 163 | 15,39 | |||
112,0 | 59 584 | 27,90 | |||
167,5 | 133 267 | 36,88 |
; 1016 , s = 100200 [4].
100´100 , 50 . af /100 = 3800/100 = 38 .
: As ,1 ³ 36,88/38 = 0,97 2.
38Æ12 400 ( - III), s = 100 ;
s ,1 = 1,131 2, s , f = 38 s ,1 = 42,98 2.
ab ab ,min ( ab ,min = 35 ):
ab = a 0,5 D = 50 0,5×12 = 44 > ab ,min = 35 . .
( 1-1):
.
5 Æ8A-I, s = 150 , s 0 = 50 .
1. 2.01.07 85*. . / . .: , 2004. 44 .
2. 2.03.01 84*. . / . .: , 2001. 76 .
3. 52 - 01 - 2003. . . .: , 2004. 24 .
4. 52-101-2003. . . . .: , 2004. 54 .
5. 52-102-2004. . . . .: , 2005. 38 .
6. .., .. . : . .: , 1991. 767 .
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7. .., .. : . . .: . ., 2006. 504 .
8. .. : . . . ., . .: , 2004. 48 .
1. ( 1:200).
2. ( 1:10), .
3. ( 1:50),
( 1:20)
4. ( 1:50).
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-2
-1
-1
1-1
( 1:10)
:
1. 40. 20 .
2. . 800 .
1. 9 .
20 lk = 8970 :
l = 8970 20 = 8950 .
S 2 = 250 :
n 2 = 7750/(2×250) = 15,5; n 2 = 15 ( ).
S 2× n 2 = 250×15 = 3750 .
:
l 0 = (7750 3750)/2 = 2000 .
S 1 = 150 :
n 1 = 2000/150 = 13,3; n 1 = 13 ( ).
S 1× n 1 = 150×13 = 1950 .
: 2000 1950 = 50 .
(8 ) 20 . .
2. 9 .
20 lk = 8970 :
l = 8970 20 = 8950 .
S 2 = 200 :
n 2 = 896550/(2×200) = 16,3; n 2 = 16 ( ).
S 2× n 2 = 200×16 = 3200 .
:
l 0 = (6550 3200)/2 = 1675 .
S 1 = 150 :
n 1 = 1675/150 = 11,2; n 1 = 11 ( ).
S 1× n 1 = 150×11 = 1650 .
: 1675 1650 = 25 .
(8 ) 20 . .
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1
, | , / 2 | ||
hn | bn | ||
и | 2540 | 110150 | 2,5 |
2 | 3040 | 2,0 |