( )
.5 .6, .14 .15 16 (..5,,). , ℓan. :
ℓan ℓan ℓan
, , , w=0,9; Dl=11; l=20 (.37 [1], .44 [2]). ℓ gb2=1,0 (.5.14 [1], .5.44 [2]). Rb=17 =1700 /2. ℓ (0,9×36500/1700+11)d=30,3d, 20d. ℓ=30,3d.
3
, | Q, | +5d, | 20d, | ||
=q'(0,425ℓ- )= =196,3(0,425×5,05- -0,835)=257,4 | = = = =42,8 | 20d4=56 | |||
=q'(0,575ℓ- )= =196,3(0,575×5,05- -1,629)=250,2 | = = = =42,0 | 20d4=56 | |||
=q'(0,60ℓ- )= =196,3(0,60×5,05- -1,465)=307,21 | = = = =48,4 | 20d6=56 | |||
=q'(0,60ℓ- )= =196,3(0,60×5,05- -0,426)=511,17 | = = = =69,7 | 20d7=50 |
.3 | |||||
=q'(0,5ℓ- )= =196,3(0,5×4,6- -0,427)=367,7 | = = = =93,3 | 20d17=50 | |||
=q'(0,5ℓ- )= =196,3(0,5×4,6- -1,31)=194,3 | = = = =56,7 | 20d16=56 | |||
=q'(0,5ℓ- )= =196,3(0,5×4,6- -0,92)=270,9 | = = = =73,5 | 20d15=56 | |||
=q'(0,5ℓ- )= =196,3(0,5×4,6- -1,32)=192,4 | = = = =52,3 | 20d13=40 | |||
=192,4 | =52,3 | 20d13=40 | |||
: 1. ; Q; W d . 2. Q , qsw1 /. 3. V'/g' 11, 0 0,339ℓ (..4) |
, . , , .
1 . . ℓ1, ℓ1 , 1 . (..1 .7).
|
|
.7. :
; -
, ( ) (.4).
b×b×H×r×gf×gn×n= =0,3×0,3×4,8×25×1,1×1×4=47,52 .
, . , . 15/25=0,6, 0,4.
4
1 . , / | , | , ( ), . | , | |
() | 16,26 - 0,6×180 | 5,6 - 5,6 | - | 364,22 47,52 1814,4 |
: Nℓ=2226,14 | ||||
0,4×180 4,2 | 5,6 5,6 | 1209,6 23,52 | ||
: Nsh=1233,12 | ||||
- | - | - | N=Nℓ+Nsh=3459,26 | |
. 6 .1 |
-- I ( 1 [4]).
S0 1 2 0,5/2 (.4 [4]). m 1,0 (.1, .3* [4]), a 250. gf : 1,4 1,6. gf=1,4, S0 0,8 (.5.7 [4]). 1 . S0mgfgnℓ2=0,5×1×1,4×1×6=4,2/.
.
b=40. =16002.
, ( As,tot)
, (5.1)
j=jb+2(jsb-jb)as, (5.2)
jsb,
: jb, jsb , . 7 8;
, , .
, jb=jsb j=jb, as=0,5 j=jsb, as>0,5 jb>jsb, . as³0,5 (5.2) , j=jsb.
(5.1) : As,tot j. , . j=jsb.
. as³0,5, .
as<0,5, , (5.1) , .. j, , . , 5%. .
|
|
. . jb=0,881, jsb=0,890 (..7 8). = , as= = =0,567. as>0,5, As,tot= 2.
, ( ), . , , (..7). 400 (.5.18 [2], .5.57 [5]). , 4Æ36AIII (As,tot=40,722), 6Æ28AIII (As,tot=36,952), 4Æ28AIII+4Æ22AIII (As,tot=39,832). . , 4Æ28AIII+4Æ22AIII. 28 , .
, , : .5, .5.22 [2], .5.59 [5], ( ) 500 , 2b (b ) 15d, 20d (d ). 10d. 3%, 10d 300 .
, A-I. 10 ( 2 .5). , 3%, 20d=20×2,2=44 , 2b=2×40= =80 50. , 5. 40.
, as<0,5. . N=2221870, b=35, =12252, jb=0,849, jsb=0,877.
RscAs,tot=2221870/0,877-1550×1225=634739,1;
as=634739,1/1550×1225=0,334, 0,5;
j=0,849+2(0,877-0,849)0,334=0,868.
RscAs,tot=2221870/0,868-1898757=661008,0;
as=661008,0/1898750=0,348;
j=0,849+2(0,877-0,849)0,348=0,8685.
RscAs,tot=2221870/0,8685-1898757=659534,3;
as=659534,3/1898750=0,347;
j=0,849+2(0,877-0,849)0,347=0,8684.
, RscAs,tot
As,tot=659534,3/36500=18,072.