. .
- .
270800.62- , : .
.. : , -2014. 50 .
270800.62- .
:
, ..., .. ;
.
2- , .
, , . .
- .
b*h=400*400 -2. (-) , : 1-3 , 3-4 , . , ( , ).
1. :
/ | () | γf | () | ||
I. | |||||
, | 0,0116 | 0,16 | 1,3 | 0,21 | |
0,033 | 0,09 | 1,3 | 0,12 | ||
- | 0,0317 | 0,51 | 1,3 | 0,66 | |
0,305 | 1,5 | 1,3 | 1,95 | ||
- | 0,03 | 1,3 | 0,04 | ||
- | 3,2 | 1,1 | 3,52 | ||
gn = 5,49 | g = 6,5 | ||||
II. | |||||
( , III ) | S = Sg = 1,81=1,8 Sn = Sg0,7=1,81 0,7 | Sn = 1,26 | - | S = 1,8 | |
gn = 6,75 | g =8,30 |
2. :
|
|
/ | () | γf | () | ||
I. | |||||
0,03524 | 0,84 | 1,2 | 1,01 | ||
- | 0,0318 | 0,54 | 1,3 | 0,70 | |
- | 3,2 | 1,1 | 3,52 | ||
gn = 4,58 | g = 5,23 | ||||
II. | |||||
( 2.01.07-85*, .3) | - | p n = 4,0 | 1,2 | p = 4,8 | |
( 2.01.07-85*,. 3.6) | - | 0,5 | 1,1 | 0,55 | |
gn = 9,08 | g = 10,58 |
3. .
H = 6,9+0,35=7,25.
: bchc = 400x400 .
ρ=1800/3 ( γ=18/3).
Nn = bchcHγγ = 0,400,407,2518=20,88 ;
N = Nn γf=20,881,1=22,97 .
4. :
bh=200x400 , ρ=2500 /3 (25 ), γ=25 /3. l= 6. 1-2 2-3 ( ).
Nn = bh l γ = 0,200,40625= 12 ͖
Nn = 12
N = Nn γf = 121,1 = 13,2
N = 13,2
5. ( ):
Nn = gn+gn +nNn+Nn = 6,7536+9,0836+212+20,88 = 614,76
Nn = 614,76
N = g+g+nN+N = 8,3036+10,5836+13,22+22,97 = 729,05
γn = 1,1
N = 729,05 1,1 = 801,96
:
N=540,00 , γn=0,95. . - .
N = 540,0
γn = 0,95
l0 = H = 3,6
N = 513
N = N γn
N =540,0 0,95 = 513
(. . ).
.. . |
1. . : :100. - 75. R = 1,7 = 0,17 /2 ( II-22-81 . 15)
2. α = 1000 (.16, II-22-81*).
3. φ = 0,8
Mg = 1,0. :
A= N/gφR = 513 /10,80,17 = 3772,06 2
4. 630630 . A = bh = 6363 = 3969 2 = 0,3969 2, 0,32, , γ = 1.
5. λh = l 0/h = 360/63 = 5,71
6. II-22-81* . 19 φ = 0,98 ( ).
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7. h˃30, mg=1.
8. : N £ mg j RA. (. 7.1 II-22-81*)
:
N = 513 ˂ mgφRA = 10,980,173969 = 661,24
: , .
, (: , 1 ). : N=545,0 , γn=0,95. - 2.
N = 545,0
γn = 0,95
l0 = H = 3,6
γn N = 517,75
N = N γn
N =545,0 0,95 = 517,75
517,75 |
.. . |
- 2 ( 60 75% II-25-80, . 1).
1. II-25-80 . 3 : Rc = 16 = 1,6 /2 ( 13).
2. . 5.2- II-25-80 .
3. φ = 0,8 .
F. = N/φRc = 517,75/0,81,6 = 404,49 2
4. 244454-80 bh = 200250 , F= 5002 , , F. F = 500 2.
5. :
rx = 0,289h = 0,28925 = 7,23 ;
ry = 0,289b = 0,28920 = 5,78 .
6. , , : λ = l 0/ry = 360/5,78 = 62,28; : λmax = 120 ( II-25-80 . 17).
7. ; λ=70, (. 6.3 II-25-80)
φ = 1-0,8(λ/100)2 = 1- 0,8(6,23/100)2 = 0,689.
8. :
σ = N/φA = 517,75/0,689500 = 1,50 /2 < Rc = 1,6 /2.
. :
σ = 15,00 < Rc = 16,0 , , . 200250 . , 1.
. |
, ( ). bh=380*380 -2, As=A1s, γn=0,95.
bh = 380x380
, .. As = A's
H = 7,25 (.)
γn = 0,95
1. ( N N l):
) :
Nn = bhHγ.. = 0,380,387,2525 = 26,17
N = Nnγf = 26,171,1 = 28,79 .
)
N = g + g+ nN+N =
6,7536+9,0836+212+28,79 = 622,67
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) N l, . (* 2.01.07-85 .1.7 : ) , 0,5)
1 2.01.07-85*
P l n 1,4 ,
pn = 4,0 γf = 1,2,
N l = N-0,5sA- pnγfA+p l nγfA = 517,75-0,5 1,8 36-4,01,236+1,41,236 = 373,03
) γn = 0,95 :
N = 517,750,95 = 491,86
N l = 373,03 0,95 = 354,38
2. : B20; γb2=0,9;
A-III; -I; : Rb=11,5 ; Rsc= 365 (.13, . 19*, 20*,22*,23* 2.03.01-84*).
3. . (. ): l0 = 3,6 . , , , , ..
517,75 |
4. :
l0/h = 360/38 = 9,47<20;
N l /N = 354,38/491,86 = 0,72
5. 2 2.03.01-84*. φb, φsb;
, φb = 0,90; φsb = 0,91
6. , α, =0,01
α = Rsc/(Rbγb2) = 36,50,01/(1,150,9) = 0,353
7. :
φ = φb + 2(φsb-φb) α = 0,90 + 2(0,91 0,90) 0,353 = 0,907<φsb = 0,91
8. :
(s+ A's) = (N/φ-Rbγb2bh)/Rsc = (491,86/0,907-1,150,93838)/36,5 = -26,09<0
9. , , ( ) ; , >250 16, 4 Ø16 A-III, As = 0,80,83,14= 8,04 2.
10. :
= (As + A's) 100/bh = 8,042100/3838 = 1,11%, min = 0,4% max = 3,0%; .
11. dsw 0.25ds = 0.25*16 = 4 ; Ø 4 -I; s:s≤20 ds = 2016 = 320, s = 300.
(.).
. . |