, .. 1.25, 1.26 [1].
:
(. 1 . 5 [1])
s1 = [(0,22 ssp / Rs,ser) 0,1] ssp = [(0,22 × 880 / 1255) 0,1] 880 = 48 ;
( . 2 . 5 [1] D t = 650)
s2 = 1,25 Dt = 1,25 × 65 = 81 ;
l = 19 ( . 3 . 5 [1] Dl = 1,25 + 0,15 d = 1,25 + 0,15 × 5 = 2 )
s3 = Dl × Es / l = 0,002 × 200000 / 19 = 21 .
s1, s2, s3 gsp = 1
p1 = gsp Asp (ssp s1 s2 s3) = 1 × 14,7 (880 48 81 21)(100) = 1073100 =
= 1073 .
䳿 p1
op = yo a, yo , . 2 yo = Sred / Ared.
2.
:
a = Es / Eb = 200000 / 32500 = 6,15;
( a )
Asp,red = a × Asp = 6,15 × 14,7 = 90,4 2;
As,red = a × As = 6,15 × 3,14 = 19,3 2;
a × 6,15 × 3,14 = 19,3 2;
Ared = + Asp,red + As,red +
= 40 × 16 + 15 × 5 + 27 × 18 + 8,5 × 6 + 109 × 10 + 90,04 + 19,3 + 19,3 = 2471 2;
Sred = SAi × yi + Asp,red × ap + As,red × a + (h a/) =
40× 16 × (154 0,5 × 16) + 15 × 5 × (154 16 0,5 × 5) + 27 × 18 × 0,5 × 18 +
+ 8,5 × 6 × (18 + 0,5 × 6) + 109 × 10 × (0,5 × 109 + 6 + 18) + 90,4 × 9 + 19,3 × 9 +
+ 19,3 × (154 3) = 198514 3.
yo = Sred / Ared = 198514 / 2471 = 80 .
䳿 1
= yo ap = 80 9 = 71 .
,
Md = gd / 8 = 5,55 × 17,652 / 8 = 216 × ;
,
= Md / gf = 216 / 1,1 = 196 × .
䳿 1 Md,
Ired = SI0 × Ai × + Asp,red × (yo ap)2 + As,red × (yo a)2 + × ( a)2 = (40 × 163/12) + 40 × 16 × (74 0,5 × 16)2 + (15 × 53/12) + 15 × 5 × (74 16 0,5 × 5)2 + (27 × 183/12) + 27 × 18 × (80 0,5 × 18)2 + (8,5 × 63/12) + 8,5 × 6 (80 18 0,5 × 6)2 + (10 × 1093/12) + 10 × 109 × × [0,5(56 53)]2 + 90,4(80 9)2 + 19,3(80 9)2 + 19,3(74 3)2 = 7568832 4.
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sp = (P1/ Ared) + [(P1 ) / Ired ] (yo a) =
=(1073000/2471) + [(1073000 × 71196000)/7568832] × (809) = 1147 /2 = 11,47 .
³ sp / R = 11,47 / 32 = 0,36 < 0,70, . 1,29 [1]. amax = 0,8 40 (a = 0,25 + 0,025 R) £ 0,8; a = 0,25 + 0,025 × 32 = 1,05; a = 0,8) (. . 6 . 5 [1]) (. 6- . 5 [1])
s = 0,85 × 40 sp / Rp = 0,85 × 40 × 0,36 = 12
slos1 = s1 + s2 + s3 + s6 = 48 + 81 + 21 + 12 = 162 .
:
40 (. 8- . 5 [1]) s8 = 40 ;
s / R = 0,36 < 0,75 (. 9- . 5 [1])
s9 = 0,85 × 150 s / R = 0,85 × 150 × 0,36 = 46 .
slos2 = s8 + s9 = 40 + 46 = 86 .
slos = slos1 + slos2 = 162 + 86 = 248 .
2 = Asp (ssp slos) = 14,7(880 248) (100) = 929040 = 929 .
8 ̲Ҳ
в
RsAsp + RsAs £ Rbgb2
1045(100) × 14,7 + 365(100) × 3,14 = 1650760 > 22(100)0,9 × 40 × 18,5 + 365(100) × 3,14= = 1579810 , .
xR = w /1 + [(ssR / ssc,u)(1 w /1,1)] = 0,692/1 + [(565/500)(1 0,692/1,1)] = 0,47,
w = 0,85 0,008 Rb × gb2 = 0,85 0,008 × 22 × 0,9 = 0,692;
ssR = Rs + 400 ssp = 1045 + 400 880 = 565 ; ssc,u = 500 gb2 < 1.
, (4.46 [4]) gs6 = 1,15 (. 3.13 [1])
x = [ gs6 RsAsp + RsAs Rbgb2 × / Rb × gb2 × b = 1,15 × 1080(100) × 14,7+
+ 365(100) × 3,14 365(100) × 3,14 22 (100) × 0,9 × (40 10) × 18,5 / 22(100) × 0,9 × 10 = 36,7 .
³ /ho = 36,7/145 = 0,253 < xR = 0,47.
̳ , (4.52 [4])
M £ Rb × gb2 × b × x (ho 0,5 x) + Rbgb2 × (ho 0,5 ) + (ho );
1320 × < 22(100) × 0,9 × 10 × 36,7(145 0,5 × 36,7) + 22(100) × 0,9(40 10) × 18,5(145 0,5 × 18,5) + 365(100) × 3,14(145 3) = 257481779 × = 2575 × .
.
9 ̲Ҳ вDz,
ί Ѳ IJ
ί
[5]. . 3. , , h, ho Q (1/8) lo 2210 (1/4) lo 4420 , Q, .
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, . 3.31 [1].
:
,
jf = 0,75 × / bho = 0,75(40 10) 18,5/10 × 71 = 0,588 > 0,5
jf = 0,5;
,
N = P2 = 929
jn = 0,1 × N / Rbt × gb2 × b × ho = 0,1 × 929000 / 1,4(100) 0,9 × 10 ×71 = 1,04 > 0,5
jn = 0,5;
1 + jf + jn = 1 + 0,5 + 0,5 = 2 > 1,5 1,5;
jb2 = 2 ( );
(76 [1])
Bb = jb2 (1 + jf + jn) Rbt × gb2 × b × = 2 × 1,5 × 1,4(100) × 0,9 × 10 × 712 = 19054980 × .
(76 [1]) Qb = Qsw = 0,5 Q
c = Bb /0,5 Q = 19054980/0,5 × 300000 = 127 < 2 ho = 2 × 71 = 142
c = 127 . Qb = Bb / = 19054980/127 = 150039 = 150 <
< Q = 300 .
III 8 , Asw = 0,503 , Rsw = 285 (. 22[1]). (. 5.27 [1]) h /3 = 80/3 = 27 50 2,21 s = 15 , (81 [1]) , 1 n = 2
qsw = Rsw Asw × n/s = 285(100) 0,503 × 2/15 = 1911 /,
(83 [1]) jb3 = 0,6
qsw = 1911 / > 0,5 jb3 (1 + jf + jn) Rbt × gb2 × b = 0,5 × 0,6 × 1,5 × 1,4(100) × 0,9 × 10 =
= 567 / .
(80 [1])
.
,
Qsw = qsw 0 = 1911 × 100 = 191100 = 191 ,
Qb,sw = Qb + Qsw = 150 + 191 = 341 , Q = 300 .
( 2210 4420 ):
s £ h /3 £ 98/3 £ 33 s £ 50 s = 30 ;
qsw = 285(100) × 0,503 × 2/30 = 956 /;
c0 = < 2 h0 = 2 × 89 = 178 ;
Qb = 2 × 1,5 × 1,4(100) × 0,9 × 10 × 892/177 = 169160 = 169 ;
Qsw = 956 × 177 = 169212 = 169 ;
Qb,sw = 169 + 169 = 338 > Q = 230 .
:
s £ 3 h /4 = 3 × 116/4 = 87 s £ 50 s = 50 ;
qsw = 285(100) × 0,503 × 2/50 = 573 /;
c0 = > 2 h0 = 2 × 107 = 214 c0 = 214 ;
Qb = 2 × 1,5 × 1,4(100) × 0,9 × 10 × 1072/214 = 202230 = 202 ;
Qsw = 573 × 214 = 122622 = 123 ;
Qb,sw = 202 + 123 = 325 > Q = 15 0 .
. , . 10.2.6 [2] . 5.46 [6].
˲
1. 2.03.01 84. / . : , 1985. 79 .
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2. .., .. : : . . 5- ., . . .: , 1991. 767 .: .
3. .. : . . 2- ., . . .: , 1989. 506 .
4. : ϳ / .., .., .. .; . ... .: ., 1995. 591 .: .
5. : . / .., .., .. .; . ... .: i, 1985. 496 .
6. ( 2.03.01 84). .II / , . .: , 1988. 144 .