1. :
( 1 . )
g = 5,269 / ² /
υ = 7,08 / ², υ l = 1,7701,2 = 2.124 / ².
1 ² :
:
q = 5 / ².
: υ sn = 3,2 / ², υ snl = 0,5 υ sn =1,6 / ².
l1 = 4700, l2 = 5200
p = 4,7∙5,2 = 24,44 2
: g = 0,95
N= gp g = 5,26924,440,95 =129,7 .
h = 510510 1800 /3
N = h ρ gf g = 0,510,514,2181,10,95=20,55
:
N 1= N + N =129,7+20,55=150,25 .
:
N= g gf g p + N = 51,10,9524,44+20,55 = 148,2 .
:
Nυ= υ pg = 7,0824,44 0,95= 164,4 .
:
N sn= υ sn p g = 3,224,440,95= 74,30 .
:
N=N12+ N+ Nυ2+Nsn = 150,252+148,2+164,42+74,30= 851,8 .
:
Nυl= υnl pg = 2,12424,440,95=49,32 .
:
Nsnl= υsnl pg = 1,624,440,95=37,15 .
:
Nl= N12+ N+ Nυl2+ Nsnl =150,252+148,2+49,322+37,15=584 ,5 .
75 50 .2 /2/ R = 1,3
= 510*510 = 260100 2
> 0.3 2 mg = 1.0.
, = 0,8: 10 = ∙ =0,8∙4,2 = 3,36 .
λh = l0/h = 3360/510 = 6,59.
(. 15 /2/) α = 1000 . 18/2/ φ = 0,948.
N= mg*φ*R*A= 1∙0,948∙1,3∙260100 = 320547 = 320,5
N = 851,8 > NKJI = 320,5 ,
, .
.. N/N = 2,6 > 2, . 2,5 , h = 640640 .
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Δ N = 4(0,64-0,64 - 0,510,51)4,2181,10,95=4,72 .
N= 856,5
= 640*640 = 409600 2
λh = l0/h = 3360/640 = 5,25
φ = 0,975
N= mg*φ*R*A= 1∙0,975∙1,3∙409600 = 519168 = 519,2
.. N/N = 856,5/519,2 = 1,65 < 2, .
500
5 5 ( , 3 ):
6060 .
λhc = 6,59 αsk = 711 φ = 0,928
N, = mg*φ*Rsk*A= 1∙0,929∙2,18∙409600 = 829226 = 829,2 < N
, .
5050 .
λhc = 6,59 αsk = 673 φ = 0,914
N, = mg*φ*Rsk*A= 1∙0,914∙2,35∙409600 = 879780 = 879,8 > N
, 500 5050 5 .
