. 8.
4.3.
Q, | . , | , | . , | , | , | . | h, | . h, | |||
K | |||||||||||
125/20 | -120 |
( ). P max, , .
. 9. .
, :
Dmax=n×n×F×Sy+1,05×G, (4.5)
n=1,1 - - . nc=0,85 - - - 2 .
F=(F1+F2)/2=(466+476)/2=471 .
Sy - , Sy=0,209+0,359+0,85+1+0,384+
+0,234=3,036
G - , G=0,6×6×15=54 .
Dmax=1,1×0,85×471×3,036+1,05×54=1393,7 .
:
.
Q=125 - ;
Q=1303 - ;
n0=4 - .
: Dmin=n×n×F×Sy+1,05×G=1,1×0,85×161×3,036+1,05×54=513,72
Dmax, Dmin :
Mmax=e×Dmax=0,625×1393,7=871,06 ×;
Mmin=e×Dmin=0,625×513,72=321,08 ×;
e=0,5h=0,5×1,250=0,625 - .
, :
,
G=382 - .
: =n×nc××Sy==1,1×0,85×20,09×3,036=57,03 |
, .
- :
- :
- ..
:
k 5 -0,5; 10- 0,65;
20 0,85; 13,8- 0,73; 18,0-0,83
:
|
|
10 :
20 :
14,8 :
17,95 :
:
.
:
- :
:
10 :
20 :
14,8 :
17,95 :
:
:
. 10.
. 11. ,
:
- .
60I: J = 31544; = 135,26 2.
= 2,06104 /2
J = 2J + 2Ax2 = 23154+ 2135.26(57,5)2 = 900715 4.
k' = 2,466
.
.
. 12.
R = kR M/h.
M = FR∙e = 222,84∙0,325 = 72,42 .
kR = 1,056, R = 1,056∙72,42/14,8 = 5,17 .
, .
. 13.
α = q/q = 19,2/14,86 = 1,29.
. 14.
267,1117
5.3. Dmax .
R = kR M/h.
max = 871,06 ∙; min = 321,08 ∙.
R. = 1,056∙ 871,06 /14,8 = 62,15 ; R. = 1,056∙ 321,08/14,8 = 22,9 .
:
. 15.
:
. 16. 24150
5.4. Dmax .
R. = 1,056∙ 321,08/14,8 = 22,9 ; R. = 1,056∙ 871,06 /14,8 = 62,15
. 17.