. , , , (P q = 11,7 , Pg =
45,75 , P u g = 117,96 , P 'u g = 122,4 , P uq = 30,17 ),
(p min= 0, p max= 278,81 ), c 0 = 1,23 2. (. 6).
- 15 (Rb = 8,5 = 8,5 × 103 , Rbt = 0,75 = 7,5 × 102 , g b 2 = 1), AIII (Ps = Rsc = 365 = 3,65 × 105 , Rsw = 290 = 2,9 × 105 ).
.
(y = 4,5 ) (41)
M 1-1= Pgy 3/6 h + P q(y - y a)2/2 = 45,75×4,53/6×6 + 11,7(4,5 - 0)2/2
=234,26 ×;
Q 1 - 1 = Pgy 2/2 h + P q(y - y a) = 45,75×4,52/2×6 + 11,7(4,5 - 0) = 129,85 .
(x 3 = 2,2 ) (45) (46):
M 3 - 3 = p max(3 c 0 - b + x 3)3/18 c 0 - P u gx 32/2 - P uq(x 3 - x)2/2
-x33(P 'u g - P 'u g)/6(b - t) = 278,81 (3×1,23 -
-3,9+2,2)3/18×1,23-117,96×2,22/2-30,17(2,2-0)2/2-2,23(122,4-117,96)/ 6(3,9-0,7) = -261,69 ×;
. 6.
- ; -
. 7.
- ; -
Q 3 3 = p max(3 c 0 - b + x 3)2/6 c 0 - P u gx 3 - P u gx 3 - P uq(x 3 - x) - x 32(P 'u g
- P 'u g)/2(b - t) =
= 278,81(3×1,23 - 3,9 +2,2)2/6×1,23 - 117,96×2,2 - 30,17(2,2 - 0) -
2,22(122,4 -
-117,96)/2(3,9 - 0,7) = -179,63 .
. . 7.
(. 8) . 6.22:
Pr = Mt - 1sin2a/0,75 l = 234,26sin25330'/0,75×0,9 = 224,23 ;
P = M 1 -1sina × cosa/0,75 l = 234,26sin5330' cos 5330'/0,75×0,9 = 165,76 ,
tga = 0,75 l/h = 0,75×0,9/0,5 = 1,35; a = 5330'.
. 8. 4 - 4
M 4 - 4 = (Pr + Q 1 - 1)0,9 l = (224,23×0,15×0,9 +165,76×0,25 = 71,71
×;
Q 4 - 4 = Pr + Q 1 - 1 = 224,23 + 129,85 = 354,08 .
5 - 5
M 5 - 5 = Pr 0,15 l + P z = 224,23×0,15×0,9 + 165,76×0,25 = 71,71
×;
Q 5 - 5 = Pr = 224,23 ;
N 5 - 5 = P = 165,76 .
|
|
6 - 6
M 6 -6 = (Pr + Q 1 - 1)(0,9 l + 0,5 l 1) + P h - b 32(p max+ p 3/2)/3 = 224,23 +
+129,85)(0,9×0,9 + 0,5×0,6) + 165,76×0,5 - 1,22(278,81 + 188,14/ 2)/3 =
=296,93 ×,
p 3 = (1 - b 3/3 c 0) p max= (1 - 1,2/3×1,23)278,81 = 188,14 ; Q 6
- 6= P - (p max+ p 3) b 3 /2 = =165,76 - 27,81 +188,14)1,2/2 = -144,41 ; N 6 - 6 = Pr + Q 1 - 1 = 224,23 + 129,85 = 354,08 .
, (. 9).
1. Q 4 - 4 = 354,08 :
) (1) (72) 2.03.01-84*:
(1)
jw1 = 1 ; jb1 = 1 - b P b
= 1 - 0,01×8,5 = 0,915; b = 0,01 - ; h 0 = (0,5 + 0,3)/2 - 0,04 = 0,36 - , = 2×30 = 60 .
354,08 < 0,3×1×0,915×8,5×103×1×0,36 = 839,97 (
);
) (2)
(84) 2.03.01-84* :
(2)
j b 4 = 1,5 - ; j n = 0 - .
354,8 > 1,5×1×7,5×102×1×0,362×0,6 = 243 .
, , .
Æ 6 III = 200 (Asw = 0,283×5 = 1,415 2).
(83) 2.03.01-84*
qsw ³ j b 3(1 +j n + j f) Rbtb /2, j b 3 = 0,6 - ; j f = 0;
qsw = 0,6×1×7,5×102×1/2 = 225 /.
S = RswAsw/qsw = 2,9×105×1,415×10-4/225 = 0,182 .
0,15 = 150 .
(75) 2.03.01-84*:
Q £ Qb+ Qsw+ Qs,inc,
Qb = j b 2(1 + j f + j n) Rbtbh o /c; j b 2 = 2 - ;
Qb = 2×1×7,5×102×10,362/0,6 = =324 ;
Qsw= qswc 0,
Qsw = 225×0,93 = 209,25 ; Qs,inc = 0. .
, Q = 354,08 < 324 +209,25 = 533,25 ( ).
. 9.
. 10.
.
2. M 4 - 4 = 286,8 ×: aM= M 4 - 4/ Rbbh 02 = 286,8/8,5×103×1×0,512 = 0,13,
h 0 = 0,55 - 0,44 = 0,51 .
. 18 ( 2.03.01-84*) (.: , 1986) 15 III g b 2 = 1 a R = 0,426.
|
|
aM=0,13<a R =0,426, .
. 20 aM=0,13
v =0,93.
As = M 4 - 4/ Rsvh 0 = 286,8/3,65×105×0,93×0,51 = 1,656×10-3 2 = 16,56 2.
Æ 22 III 200 (As = 19 2).
Æ 12 AIII 200 (. 11).
, .
1. Q 5 - 5 = 224,23 N 5 - 5 = 165,76 :
) (1):
Q 5 - 5 = 224,23 < 0,3×1×0,915×8,5×103×1×0,44 = 1026,63 ,
h o= (0,5 + 0,46)/2 - 0,04 = 0,44 ( ); ) (2):
Q 5 - 5 = 224,23 < 1,5(1 - 0,1)7,5×102×1×0,442/0,23 = 852,26 ,
j n = -0,2 N 5 - 5/ Rbtbh o= -0,2×165,76/7,5×102×1×0,44 = -0,1. c
= 0,23 - (. 10).
,
852,26 > 2,5 Rbtbh o= 2,5×7,5×102×1×0,44 = 825 .
825 .
2. M 5 - 5 = 71,71 × N 5 - 5 = 165,76 :
h o= 0,46 - 0,04 = 0.42 .
e o = M 5 - 5/ N 5 - 5 = 71,71/165,76 = 0,432 ;
e = e o - h /2 + a = 0,432 - 0,46/2 +0,04 = 0,242 ;
e ' = e o+ h /2 - a' = 0,432 + 0,46/2 - 0,04 = 0,622 .
e ' = 0,622 > h o- a' = 0,42 - 0,04 = 0,38 , a,
a = [ N 5-5 e - RscAs '(h o - a')]/ Rbbh o2 = [165,76×0,242-3,65×105×5,65×10-4 × ×(0,42 --0,04)]/
8,5×103×1×0,422 = -0,026 < 0,
As ' - Æ 12AIII 200 (5Æ12 AIII, A s' = 5,65 2 = 5,65×10-4 2).
a < 0,
As = N 5 - 5 e '/ Rs (h o - a') = 165,76×0,622/3,65×105(0,42 - 0,04) = 7,43×10-4 2 = 7,43 2.
1 5 Æ 14 AIII As = 7,69 2. (. 11), 5Æ 22 AIII (As = 19 2).
, 6-6 =296,93 × N6-6 = 354,08 :
h0 = 0,6 - 0,04 = 0,56 ;
0 = 296,93/354,08 = 0,839 ;
= 0 - h /2 + a = 0,839 - 0,6/2 + 0,04 = 0,579 ;
¢ = 0 + h /2 - a ¢ = 0,839 + 0,6/2 - 0,04 = 1,099 ;
¢ = 1,099 > h0 - ¢ = 0,56 - 0,04 = 0,52 , a,
¢ s - (5Æ12III; ¢ s = 5,65 2 = =5,65×10-4 2).
a > 0,
As = (x bh0Rb + N6-6)/0,7 Rs + A¢sRsc/Rs = (0,04×1×0,56×8,5×103 + 354,08)/0,7×3,65×105 + 5,65×10-4×1= =26,96×10-3 2 = 26,96
2,
0,7 - (. . 6.22); x - , a . 20 .
5Æ28AIII 200 (s = 30,79 2). . . 11.
|
|
, ( , ).
. 11.
. 12.
5. ( )
. - (). = 4,5 , d = 1,2 . -60 1,5 . . 12. - ( - ):
j I = 16; j I = 16 /3; I = 21 ;
j II = 17; j II = 16 /3; II = 24 .
- :
j¢ I = 30; g¢ I = 20,9 /3; ¢I = 0;
j¢ II = 32; g¢ II = 20,9 /3; ¢II = 0.
0,6 4,2 ( 300 ), :
j I(s) = j II(s) = 40; I(S) = c II(s) = 0; g I(s) = 21
/3.
, .
.
:
; q0 = 30.
: tg e = 3/5,7 = 0,526; e = 2748¢ 28.
. 3 . 2 ( d = j ¢I= 30; r = 0; e = 28) l = 0,33.
-60 (13)
q = 90/(2,5 + ya tgq 0) = 90/(2,5 + 1,35 tg 30) = 27,44 .
= /(tg q 0 + tg e) = 1,5/(tg 30+ tg28) = 1,35 .
b = (b0 + 2tg q 0)/(tg e + tg q0) = (3,3 + 2tg30×1,35)/(tg 28+ tg30) = 4,38 .
. 5.7 :
yb = h - ya = 5,7 - 1,35 = 4,35 .
= 5,7 , (1)
.
(10)
.
Fsa (16), (17), (18): Fsa = Pgh /2 = 45,21×5,7/2 = 128,85 ;
Fsa, q = Pqyb = 6,15×4,35 = 26,75 ;
Fsa = Fsa, g + Fsa, q = 128,85 + 26,75 = 155,6 .
(. 13) :
. 13. 5
1. - b 1 = 0 (. 13).
(21)
F u= F satg(e + jI') + gI'gf[ h(b - t)/2 + td ] +gItgb1 b 2/2 = 155,6
tg (28 +30) +
|
|
+20,9×1,2 [5,7(3,6 - 0,6)/2 +0,6×1,2] + 0 = 481,56 .
(22)
Er = gI hr 2l r /2 + c I hr (l r - 1)/ tgjI= 20,9×122×1/2 + 0 = 15,05 .
Fsr (19), . 6.7, jI (s) = 30, l r = 1.
Fsr = F u tg(jI (s) - bI) + bc + Er = 481,56 tg(30 - 0) + 0 + 15,05 = 293,1 .
(15):
Fsa = 155,6 < 0,9×293,1/1,1 = 239,81 .
.
2. (b 2 = 0).
F u (s) = F u + b(s)d IgI (s) = 481,56 + 4,2×0,6×21 = 534,48 ;
Er(s) = 20,9(1,2 + 0,6)2×1/2 + 0 = 33,86 ;
Fsr(s) = 534,48 tg(16 - 0) + 0 33,86 = 187,1 .
(15):
Fs a= 155,6 < 0,9×187,1/1,1 = 153,08 .
.
3. (b 3 = = j I= 16).
Er = gI hr 2l r /2 + c I hr (l r - 1)/tgjI = 16(1,2 + 0,6 + 0,91)2×1,76/2 + 21(1,2 +
+0,6 + 0,91)(1,76 - 1)/tg16 = 254,26 ; l r = tg2(45 + jI/2) = tg2(45 +16/2) = 1,76;
Fsr = F u tg(jI - b3) + bc I + Er = 0 + 3,6×21 + 254,26 = 329,86 .
(15):
Fsa = 155,6 < 0,9×329,86/1,1 = 269,89 .
.
d I :
tgdI = Fsa /F u = 155,6/481,56 = 0,3231; dI = 18.
sinjI (s) = sin40 = 0,642 > tgdI,
(26)
h * = [ Fsa,g h /3 + Fsa,q (h - ya - yb /2)]/ Fsa = [128,85×5,7/3 + 26,75(5,7
- 1,35
-4,35/2)]/155,6 = 1,95 ;
' ' |
= 155,6[1,95 - tg (28+ 0)× ×(3,6/2 - 1,95tg28] + 20,9×1,2(3,6 -
0,6)[5,7(3,6
-4×0,6) +6×0,6×1,2]/12 = 183,4 ×; e = M 0/ F u = 183,4/481,56 = 0,38 ; b ' = b - 2 e = 3,6 - 2×0,38 = 2,84 .
. 5 jI= 30 dI= 18; Ng = 3,35; Nq = 8,92; Nc = 13,72;
I c (s) |
8,92×20,9×1,2 + 0) =
=1202,75 ;
F u = 481,56 < gc Nu /g n = 0,9×1202,75/1,1 = 984,07 .
.