12.1.1 ( , , , .), , 105 , , , , .
.
, 20.13330.
( , ..), 20.13330.
12.1.2
(170)
σmax - , φ, φb, φe;
Rv - , 35 Run , .1 ;
α - , :
≥ 3,9106 α = 0,77;
n < 3,9106 :
1 2
(171)
3-8
(172)
γv - , 36 ρ = σmin / σm ( σmin - , , σm). σm σmin ρ .
(170) α Rv γv ≤ Ru / γu.
(. 2011 .)
12.1.3 , 105, , , .
35
Rv Run, /2 | |||||
420 | . 420 440 | . 440 520 | . 520 580 | . 580 675 | |
90 | |||||
75 | |||||
60 | |||||
45 | |||||
36 | |||||
27 |
36
|
|
( σm) | ρ | γv |
-1 ≤ ρ ≤ 0 | 2,5 1,5-ρ | |
0 < ρ ≤ 0,8 | 2,0 1,2-ρ | |
0,8 < ρ < 1 | 1,0 1-ρ | |
-1 ≤ ρ < 1 | 2,0 1-ρ |