, 2030,
(8.12)
V1=2702/ V=1/ , V=1,32/- .
8.39 [2] -200 V50=2202402/
RA1/ V Rra=288,32/1901=0,32 RA2/ V Rr=656,7/1834,3=0,78
.. RA2> RA1, 
=0,036, =0,35 Y=1,62
Ra1/ V Rra< Ra2/ V Rr>
: R= V Ra1στ=12881,31=374,81
σ=1,3- ;
τ=1- ,
.
:
R=( V Rr+ Y Ra2) σ τ=(0,451834,3+1,81656,7)1,31=2033,2
7.
Crp=REr 
=17030,62
.. Crp< Cr 36207
RAx=RBx=Ft/2=1617/2=808,5
3.
1.
RAx=RBx=Ft/2=1617/2=808,5
2.
∑=0 74RBy - 37Fr+Fa 
=0
74RBy - 37603,7+368,35163/2=0 RBy=707,5
∑=0 37Fr -74 RAy+Fa 
=0
37603,7-74 RAy+368,35163/2=0 RAy=-103,8
RAy+ RBy+ Fr=0 -103,8+707,5-603,7=0
3.
RrA= 
=815 H
RrB= 
=1074,4
4. 9.3[2]
: Rs=e Rr = 0,32 815=260,8
: Rs= e Rr =0,32 1074,4=343,8
.. Rsa > Rsb, Ra1= Rsa=260,8
Ra2= Ra1+ Fa=260,8+368,35=629,15
5.
Ra1/ V Rra=260,8/1815=0,32 Ra2/ V Rr=629,15/11074,4=0,58
.. Ra2> Ra1, I Ra2/r=1629,15/23700=0,026
=0,34 Y=1,62
6. Ra1/ V Rra< Ra2/ V Rr>
: R= V Ra1στ=1260,81,31=339
σ=1,3
τ=1- ,
.
:
R=( V Rr+ Y Ra2) σ τ=(0,4511074,4+1,81629,15)1,31=2109
7.
Crp=RE2 
=10700
.. Crp< Cr, 36208
8.
1.
|
|
|
= R1=808,535,510-3=28,702 ͷ
= R1=397,835,510-3=14,122 ͷ
= R1- Fa d1/210-3=7,304 ͷ
2. I- I.
:
W= 
-
:
Wp=0,2df3=0,233,253=7352 3
. :
Kσ = (
)/Kυ=(3,5+1-1)/1=3,5
τ = (
+F-1)/ Kυ=(2,5+1-1)/1=2,5
3. .
I- I σ=σmax=1,62 σm=0
τ=τ=0,5τmax=0,54,09=2,04
sτ= 
=45,62
s= 
=38,83>[ s]=2,1
1.
= R1=808,53710-3=30 ͷ
= R1=707,53710-3=26,2 ͷ
= R1- Fa d1/210-3=56,2 ͷ
= 
2. I- I.
:
W=0,1df3=0,1453=9112,5 3 -
:
Wp=0,2df3=0,2453=18225 3
3. .
I- I σ=σmax=6,8 σm=0
τ=τ=0,5τmax=0,57,2=3,6
sτ= 
= 24,3
s= 
=13,26>[ s]=2,1
d1=30 . 8.15 [2]
b=5, h=5, t1=3, t2=23, l=40
<[ σ]=100
1=1-b=40-5=35
d1=34 . 8.15 [2]
b=6, h=6, t1=35, t2=2,8, l=40
<[ σ]=100
1=1-b=40-6=34
d=45,, l1=36
b =12, h=8, t1=5, t2=3,3
<[ σ]=100
:
