8.1.46 () ( ) , - .
, h 0/2 , ( 8.10).
Rbt , h 0 h 0/3, Rsw.
, , . , , .
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8.10 -
8.1.47, - 8.1.48, - 8.1.49 - 8.1.50.
; - ( 8.11, , ), - , : , , ( 8.11, , ), .
6 h , , , , .
lo , - , .
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, , Mult F Fult.
.
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- ; , - , , - . 1 - ; 2 - ; 2' - ; 3 - ( 1 Y 1); 4 - ( X Y); 5 - ; 6 - ; 7 - ()
8.11 -
8.1.47
F £ Fb,ult, (8.87)
F - ;
Fb,ult - , .
Fb,ult
Fb,ult = Rbt × b,(8.88)
b - , 0,5 h 0 F h 0( 8.12).
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1 - ; 2 - ; 3 -
8.12 -
b
Ab = u × h 0,(8.89)
- ;
h 0 - h 0 = 0,5(h 0 x + h 0 ),
h 0 x h 0 y - , X Y.
8.1.48 ( 8.13)
F £ Fb,ult + Fsw,ult, (8.90)
Fsw,ult - , ;
Fb,ult - , , 8.1.47.
Fsw,ult, , ,
Fsw,ult = 0,8 qsw × u, (8.91)
qsw - , 0,5 h 0
(8.92)
Asw - sw, 0,5 h 0 ;
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- , 8.1.47.
, ( ) Lswx Lswy ( 8.11, ).
Fb,ult + Fsw,ult 2 Fb,ult. Fsw,ult 0,25 Fb,ult.
8.1.47, 0,5 h 0 ( 8.13). , , , ( 8.11, ).
, 10.3. 10.3 , , .
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1 - ; 2 - ; 3 - , ; 4 - ; 5 -
8.13 -
8.1.49 (. 8.12)
(8.93)
F - ;
- , (8.1.46);
Fb,ult Mb,ult - , .
l , .
Fb,ult 8.1.47.
b,ult
b,ult = Rbt × Wb × h 0. (8.94)
Wb - , 8.1.51.
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(8.95)
F, Mx My - X Y, (8.1.46), ;
Fb,ult, Mbx,ult, Mby,ult - X Y, .
Fb,ult 8.1.47.
bx,ult Mby,ult , , X Y .
8.1.50
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(8.96)
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F, Mx My - . 8.1.49;
Fb,ult, Mbx,ult Mby,ult - X Y, ;
Fsw,ult, Msw,x,ult Msw,y,ult - X Y, .
Fb,ult, Mbx,ult, Mby,ult Fsw,ult 8.1.48 8.1.49.
Msw,x,ult Msw,y,ult, , , , X Y
Msw,ult = 0,8 × qsw × Wsw, (8.97)
qsw Wsw - 8.1.48 8.1.51.
Fb,ult + Fsw,ult, Mbx,ult +Msw,x,ult, Mby,ult + Msw,y,ult (8.96) 2 Fb,ult, 2 b,ult, 2 by,ult .
, 10.3. 10.3 , , .
8.1.51 Wbx (y) Y
(8.98)
Ib () - Y 1 1, ( 8.11);
x ()max - ;
Ib () Ib () i , , .
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(8.99)
Li - ;
xi (i)0 - .
Wbx Wby.
D - .
8.1.52 Wsw,x (y) , , h 0/2 (. 8.13), Wbx Wby.
, ( ), , , Lswx Lswy ( 8.11, ).