| . . | ||||||
| -I | A-II | -III | A-IV | p-I | ||
| 1. | . | 1,35 | 1,30 | 1,25 | 1,05 | 1,0 |
| 2. | . | 1,1 | 1,1 | 1,1 | 1,0 | 1,0 |
, m = 1,1, =1,3:
1)
R = 3000 . 1,1 = 3300 /2
= R . = 3000 . 1, 3 = 4290 /2.
2) ( )
R = 2400. 1,1 = 2640 /2.
= R . = 2640 . 1, 3 = 3432 /2.
, = 1,1:
R = 3000 . 1,1 = 3300 /2
= R . = 3000 . 1, 1 = 3630 /2.
. R = 3 /2 [7].
-: [8)]
- - : l = 6000 = 6 ; b = 750 ; h = 220 ;
g = 2,5 /3 = 2,5.10-3 /3;
- : h = 60
g = 2,5/3 = 2,5.10-3 /3;
- : h = 70 , g = 1,8/3 = 1,8.10-3 /3.
( I )
.
.
, h = 70 :
q = h . g = 70 . 1,8 . 10-3 = 126 . 10-3 /2.
, h = 220 ,
q = h . g = 22 . 1,8 . 10-3 = 55 . 10-3 /2.
q = q + q = 126 . 10-3 + 55 . 10-3 = 181 . 10-3 /2.
=1 ∆ = 1 /2 : [1]
q = .∆ = 1 . 1 = 1 /2.
:
= q + q =181 . 10-3 +1=1,181 /2.
- [8]. 21: l = 3 ; b = 1 ; h = 0,5 ; 3,8 3800.
N = P max. . F + N ,
F , F =600 . 300 = 18 . 104 2;
P max = D = 1/2;
G - () ,
G = l . b . h n . g n = 2,5 . 10-3. 50 . 80 . 600=6000 /2,
N ;
N = + N + N + G ,
N = 600. 300. 70. 2,5. 10-3 +600. 300.70.1,8 .10-3+ 6 . 103= 0,75. 105 /2,
P max. . F = 1 . 1 . 18 . 104 = 18 . 104 = 1,8 . 105 /2,
N = 1,8 . 105 + 0,75 . 105 = 2,55 . 105 /2.
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. 13 [2].
