: , , . , , .
: . .11.12. II-23-81* , .
, :
.
, :
.
.62 II-23-81* : db = 20 , Ab = 3,142, Abn = 2,452 .
.61 -303 Rbun = 1350 .
d = db + 3 = 20 + 3 = 23.
.11.13. II-23-81* Qbh, , , :
,
Rbh , :
Rbh = 0,7 Rbun = 0,71350 = 945,
μ , .36* II-23-81*: μ = 0,58 ;
γh , .36* II-23-81*: γh = 1,02;
γb , , . .11.13. II-23-81*: γb = 0,9;
n :
.
8 db = 20.
k .
t = w, ..
=>
30 .
t = 12
.12.19* .39 II-23-81*:
1. :
) 3 d = 323 = 69;
) .
2. :
) 1,3 d = 1,323 = 30;
) .
:
40 80 40
30 32034012.
4´70
:
.11.14. II-23-81* , , , , , .
;
.;
nb = 4 ;
nb = 8 .
|
|
=> :
2.
, :
.
t = tw = 10. nb = 10 20. :
.
.12.19* .39 II-23-81* 120. : a1 = 120, a2 = 360, a3 = 600, a4 = 840, a5 = 1080.
:
! . .
.11.13. II-23-81* Qbh, , , :
! . ,
Rbh :
Rbh = 0,7 Rbun = 0,71350 = 945;
μ , .36* II-23-81*: μ = 0,58;
γh , .36* II-23-81*: γh = 1,02;
γb , , . .11.13. II-23-81*: γb = 1.
:
.
db = 20, 1200 .
:
,
,
.
3.
.