σs = σsl .. = Ml = 67,37 .
, es p = 0,0, Ms = l = 67,37 ͷ
h 0= 190 ,
, , . :
= 0,907 D = 0,907159 = 144,2 ; = 0,866 D = 0,866159 = 138 .
3.4
bf = b'f = 1475 ; b = (1475 - 7144,2) = 465,6 ;
hf = h'f = (220-138)/2 = 41 .
A'sp = A's = 0,0,
as 1 = 300/ Rb,ser = 300/18,5 = 16,02,
. 3.4.
, φf = 0,47 μas 1 = 0,212 . 12 ζ = 0,78,
z = ζh = 0,78190 = 148,2 .
.
σs,crc Ms = crc = 74,0 ͷ
, φf = 0,47 μas 1 = 0,212 . 12 ζ = 0,8,
z = ζh = 0,8190 = 152 .
σs, M = tot = 86,63 ͷ.
. 12 es / h 0 =1,1 φf = 0,47 μas 1 = 0,212 ζ = 0,81, z = ζ h 0 = 0,81190 = 153,9 .
s = Mtot =86,63 ͷ σs
A > t, t =0,59,
< 0, (2.3):
acrc = acrc 1+ acrc 2- acrc 3,
ψs, σs = 165,3 ,
ls.
, , Sred = 16323024 3
yt = ky 0= 0,9536,95= 36,76 .
yt < 2 = 230 = 60 , yt = 60 .
Abt = byt +(bf - b) hf = 465,6 60+(1475- 465,6)41 = 69321,4 2,
ls >400 ls < 40 d = 4012 = 480 , ls = 400 .
(2.6) acrc, 1, φ 1 = 1,4, φ 2 =0,5
(2.6) acrc, 2, φ 1 = 1,0, φ 2 =0,5
(2.6) acrc, 3, φ 1 = 1,0, φ 2 =0,5
,
0,3 . .
, .. = Ml = 67,37 ͷ.
|
|
: , φf = 0,47,
: εb 1, red = 28×10-4 70 ≥W ≥ 40
;
. 13 φf = 0,47, es/h 0 = 0,86 μαs 2 = 0,51 φc =0,48. (2.15)
.
(2.14) , σsb =86,5 .
1/,
σsb
.
, S =5/48:
20.13330.2011 .2 l = 5,84 fult = 5840 / 200 =29,2 , . .