, , .1[7] ( . .9)
; . (5.18)
S - . , 5 :
S = , (5.19)
b , 0,8;
hi Ei i - ;
n , .
szp,i i - , i , ;
σ zγ, , , z i -
, 0,4 (hi £ 0,4× b). 0,2× b 0,4× b.
z , ,
, (5.20)
a , , .1 ( . ..10) h = l / b , x = 2 ×z / b;
σ zγ, = α . σ zg, 0, (5.21)
σ' zg, 0= g' × d n, , .
g' ;
d n .
s zg, 0 = g' × d, s zg, 0 = g' × d n,
d .
s zg z ,
, (5.22)
|
|
g i h i i - ;
m , z.
, , , ! .. s zg , . gw × hw, gw = 10 /3 ; hw , . , , £ 0,5 IL £ 0,1.
() z = Hc,
. (5.23)
k , . b ≤ 5 k = 0,2 ; b > 20 k = 0,5; 5 < b ≤ 20 k ; £ 5 z = Hc, k = 0,1.
, . (. 5.5) . (s zg), (s z p). () . .
(.5.2).
. 5.5. .
S .
5.2.
hi, | zi, | z i | a i | s zg,i, | k∙ s zg, | s zp,i, | σ zγ, | , | , | Ei, | Si, | ||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | |
1 |
| 0 | 0 | 1 | s zg,0 | k∙ s zg,0 | a i × | α .σ zg, 0 |
|
| Ei | ||
h1 | . | k∙ s zg,1 | a i × | α . σ zg, 0 | |||||||||
2 |
|
|
| Ei | |||||||||
. | k∙ s zg,2 | a i × | α . σ zg, 0 | ||||||||||
n |
|
|
| En | |||||||||
. | k∙ s zg,n | a i × | α .σ zg, 0 | ||||||||||
. , , , 7 8 . 8 7 , .. , .
40 % S u ( .7), , ( 20 %).
|
|
, .. ! ., , . ! ..
! . .