1- . .
(Qb) (Qsw). . 4.2.
|
, ( - . 3.31* [2]):
Qb,min = j b 3 Rbt g b 2 bh 0 = 0,6×0,105×0,9×25×81,75 = 115,88 < Q = 414,41 .
j b 3 - , ; j b 3 = 0,6.
h 0 . 4.1.
4 Q < Qb,min, .
, Qb,min, Qb. , :
Qb = Qsw = Q / 2 = 414,41 / 2 = 207,21 .
, :
Mb = j b 2 Rbt g b 2 bh 02 = 2,00×0,105×0,9×25×81,752 = 31 577 × ;
j b 2 - , ; j b 2 = 2,00.
- (76) [2]:
0 h ≤ 0 ≤ 2 h 0 = 281,75= 163,5 .
, 0 .
, 0 (, 0 > 2 h 0, 0 = 2 h 0).
, :
Qb < Q, .
2- . , .
- (82) [2]:
.
- (33) [2] qsw :
,
qsw = 2,385 / > 0,709 /, .
(81) [2]:
.
, 2Æ10 400 (-III), (sw = 1,57 2).
d ≥ D /3 : d = 14 > 36/3 = 12 .
, :
; S ≤ S max .
3- (). .
( , ):
.
- (80) [2]:
.
, : .
|
|
, :
Qsw = qsw 0 = 1,821×131,66 = 239,75 .
, Qb = Qb + Qsw = 239,84 + 239,75 = 479,59 > Q = 414,41 .
, . : , , , .