Q max=231,7 , q = q 1 =60,97 /
-I (Rsw = 175 ; Es = 210000 ), h 0 = 562.
.6.. .
- L1; -
j f = 0 j b2 = 2
b = j b2 Rbt b h 20 = 20,9452505622 = 149,23 ͷ.
C .32 [3] Qb 1 = 2 2 = 190,77 .
Qb 1/0,6 = 190,77/0,6=317,95 > Q max = 231,7 , :
qsw = /.
/ > qSW =29 /,
qsw = 36,4 /. [3, (57)]:
Qb ,min = j b3 Rbt b h 0 = 0,60,945250562 = 79,7 ;
qSW = 36,4 / < Qb ,min/2 h 0 = 79,7/(20,562) =70,9 /, qSW:
= =55,68 /.
. [2.5.27], S 1 h /3 =600/3 =200 , 3/4 h = 3/4600 = 450.
smax = ;
S 1 = 200 , S 2 = 450 ,
Asw = qSW S 1/ Rsw = 55,68200/175 = 63,66 .
8 (Asw = 101 2). , :
qsw 1= Rsw Asw / S 1 = 175101/200=88,38 /; qsw 2 = Rsw Asw / S 2 = 175101/450 = 39,28 /. [3,57].
qsw 1 = 88,38 / > Qb , min/2 h 0 = 70,9 ,
qsw 2 = 39,28 / < Qb , min/2 h 0 = 70,9 ,
l 1 b Qb , min:
b = 2 h 02 qsw 2j b 2/j b 3 = 2562239,282/0,6 = 82,71 ͷ.
Qb , min = 2 h 0 qsw 2 = 256239,28 = 44,15 .
c01 = 0,97 < 2 h 0 = 1,12.
q 1= 60,97 / < 1,56 qsw 1- qsw 2 =1,5688,38-39,28 = 98,59 /, c
= = =2,6 ,
, l1
l1=c- 1,87 - .
L 1= l 1 + 0,2 =1,35+ 0,2 = 1,55 < (1/4) l = (1/4) 7,0 = 1,75
L1=1,75 .
:
m w = Asw /(b s) =101/(250200) = 0,00202
a= Es/Eb =210000/30000=7
j w 1=1+5am w =1+570,00202=1,07;
j b 1 = 1 - b Rb = 1- 0,0113,05 = 0,87;
0,3j w 1j b 1 Rb b h 0 = 0,31,070,8713,05250562 = 512,38 > Q max = 231,7 , , .
.
, , .
2 Æ 25 -III, As = 982 2;
x = Rs As /(Rb b) = 365982/(13,05250) = 109,86 ;
x = x / h 0 = 109,86/562 = 0,195 < xR = 0,604;
|
|
= Rs As (h 0 0,5 x) = 365982(562 - 0,5109,86) = 181,75 ͷ.
4 Æ25 -III As = 1963 2.
x = Rs As /(Rb b) = 3651963/13,05250 = 219,6 ,
ξ=219,6/532=0,41<ξR=0,604
= Rs As (h 0 0,5 x) = 3651963 (532 - 0,5219,6) = 302,5 ͷ.
2 Æ 12 -III s = 226 2
x = Rs As /(Rb b) = 365226/13,05250 = 25,3 ,
= Rs As (h 0 0,5 x) = 365226 (558 - 0,525,3) = 44,99 ͷ.
2 Æ28 -III s = 1232 2;
x = Rs As /(Rb b) =3651232/13,05250 = 137,83 ,
ξ=137,83/558=0,247<ξR=0,604
= Rs As (h 0 0,5 x) = 3651232 (558 - 0,5137,83) = 219,93 ͷ.
, .
[3 . 3.46]. Q 25
Q = 100 ,
w 1 = Q /(2 q sw) + 5 d = 100103/(288,38) + 525 = 72 .
28 Q = 74,8
wb = Q /(2 q sw) + 5 d =74,8103/(288,38) + 528 = 56 .
.7. . M Q ;
.
, 3,3
5
25
A-I
, 1,4
, 0,28
, 5,97,0 = 41,3 2
g n = 0,95.
:
- 4,23641,30,95 = 166,2 ;
- 0,250,6 7,0 r =25 /3 g f =1,1 0,250,67,0251,10,95 =27,43 ;
- 0,30,3 3,3 0,30,33,3251,10,95 = 7,76 ;
: 166,2+27,43+7,76=201,39 .
641,30,95 = 235,41 , 4,241,30,95 = 164,79 .
5 /2 541,30,95=196,18 , 196,18+27,43+7,76 = 231,37 .
. (II s0 = 0,7 /2) g f = 1,4 0,71,441,30,95= 38,45 , 0,538,45 = 19,23 .
, () ( - 5) :
|
|
N= (201,39 + 235,41)(5-1) + 231,37 + 38,45 = 2017 ;
Nl = (201,39 + 164,79)(5-1) + 231,37 + 19,23 = 1715 ;