, . .
(. . 5.2, ), (. . 5.2, ). , . .
A-I...A-III 6...14 ( -I)*. 1/5 d1 8 ; , , , 3 .
, , 4...14 , 45×45 100×100 , 1/4 , s=6...15 . (. . 5.2, ).
, , . , , . .
, Rb Rb,red,
φ , φ = 1/(0,23+ψ), ψ = μxyRs,xy/l(Rb+10); μxy , μxy=(nxAsxlx+nyAsyly)/(Aefs); nx,Asx, lx , , ( ) ; n, Asy, ly , ; f , ; s ; Rs,xy .
* -II, .
(0=0) . e0 .
, , . , , , , .
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ξ R (4.5), , [1]. l0/i≤35 ( i , ), , , ( Aef Rb,red), , Rb ( ).
, :
Ared ired ; .
α=0,65Rs/Rb.