.
Ninf = N + Adgmt, | (7.5) |
N gf = 1,0. , gf = 1,0;
d - ; d = h + 0,15 ;
gm , 20 /3;
Minf = Mn + Qnh, | (7.6) |
Mn gf = 1,0. e.., M.. = N. e.. e. .
d b:
d £ 2
R=R 0[ I + k 1(b - b 0)/ b 0](d + d 0) / 2 d 0; | (7.7) |
d > 2
R=R 0[ I + k 1(b - b 0) /b 0] + g k 2(d - d 0), | (7.8) |
R 0 , 1 2 , - ;
b d , ; b 0= 1; d 0= 2 ; g - 13 , , /3; k 1= 0,125 , , ; k 1= 0,05 , , , ; k 2= 0,25 , , ; k 2= 0,2 , ; k 2= 1,15 , .
(7.9) |
pmax £ 1,2 R pmin ≥ 0. , , , . .
γf ≥ 1
F £ Rbtbm ho,pl, | (7.10) |
F F = A 0 pmax, 0 ,
|
|
A 0 = 0,5 b (l - hf - 2 h 0 ,pl ) - 0,25(b - bf - 2 h 0 ,pl )2, | (7.11) |
b - bf - 2 h 0, pl £ 0 ; bf, hf ; pmax - gf = 1,0, ( ),
, | (7.12) |
bm :
b - bf > 2 h 0, pl bm = bcf + h 0, pl; b - bf £ 2 h 0, pl, bm = 0,5(b + bcf), | (7.13) |
h 0, pl
h 0, pl = hpl a, | (7.14) |
a , 5080 .