; . ,
,
;
Mcrc ,
Mcrc = γWredRbt,ser + P (e 0p + r).
,
Wred ,
r ,
γ =1,3 , (. 11 ).
- . , .
acrc ≤ acrc,ult, | (2.1) |
acrc - ; acrc,ult - .
, , acrc,ult :
- 240 600, 500:
0,3 - ;
0,4 - ;
- 800, 1000, 1200 1400, 1400, 1500 (-19) 1500 (-7) 12 :
0,2 - ;
0,3 - ;
1500 1500 (-7) 6 9
0,1 - ;
0,2 - .
:
-
acrc = acrc 1; | (2.2) |
-
acrc = acrc 1+ acrc 2- acrc 3, | (2.3) |
acrc 1 - , φ 1 = 1,4 (. . = Ml);
acrc 2- , φ 1 = 1,0 (.. = Mtot);
acrc 3 - , φ 1=1,0 (.. = Ml),
acrc = acrc 2(1+0,4 A), | (2.4) |
(2.5) |
σs, σsl, σs,crc Mtot, Ml r.
, A > t, , - .
: t = 0,68 - 0,3 0,4 ;
t = 0,59 - , 0,2 0,3 ;
t = 0,42 - 0,1 0,2 .
|
|
(2.6) |
. σs = σsl .. = Ml = 107,05 .
es p = 0,0, Ms = l = 107,05 ͷ
h o= 360,
A'sp = Asp = 0,0,
as 1 = 300/ Rb,ser = 300/18,5 = 16,02,
, φf = 0,95 μas 1 = 0,195 . 12 ζ = 0,84, z = ζ h = 0,84360 = 302,4 .
σs,crc Ms = crc = 92,82 ͷ;
, φf = 0,95 μas 1 = 0,195 . 12 ζ = 0,85, z = ζ h = 0,85360 = 306 .
σs, M = tot = 126,26 ͷ. . 12 es / h 0 >1 ζ es / h 0, z = 302,4 . s = Mtat =126,26 ͷ σs
A > t, t =0,59,
,
, .
ψs, σs = 246,8
ls
,
Abt .
, , Sred = 38592299,2 3
yt = ky0 = 0,95124,27= 118,05 .
yt > 2 = 240 = 80 , yt = 118,05 .
Abt = byt = 185118,05 = 21839,25 2,
ls < 400 ls < 40 d = 4020 = 800 , ls = 348 .
acrc, 2, φ 1 = 1,0, φ 2 =0,5
acrc = acrc, 2 (1 + 0,4 A) = 0,169(1 + 0,40,4) = 0,196 ,
0,3 .
f ≤ fult, | (2.7) |
f - ;
fult - .
.
, , , , ..
(2.8) |
- ;
S - , .14.
:
)
(2.9) |
- ;
- (.. M = Peop).
|
|
(2.10) |
- , ;
Ired - , , =Es /Eb 1; Eb 1- , :
-
Eb 1= 0,85 Eb; | (2.11) |
-
(2.12) |
)
(2.13) |
- , ;
- ;
- .
, (2.9) (2.13) , (1) .
(2.14) |
σsb σ'sb - , , .
h'f ≤ 0,3 ho a's < 0,2 h 0
(2.15) |
φ - , . 13 φf, μas 2, es / h 0
. , .. = Ml = 107,05 ͷ.
: , φf = 0,95,
εb 1, red =28×10-4 70 ≥W ≥ 40 %.
. 13 φf = 0,95, es/h 0 =1,35 μαs 2 =0,36 φc =0,61.
, σsb =125,16 .
1/
σsb σsb = 40+85,16=125,16 .
, S =5/48:
20.13330.2011 .2 l = 5,84 fult = 5840 / 200 =29,2 , .