l01 = l. b./2 + /2 = 5600-250/2-200+250/2 = 5400
l02 = l. b. = 5600 250 = 5350
1
V = G × l × 
f × n =8 × 2.13 ×1.2 ×1 = 20.48
q=q × l× n + b.(h. h)p × f × n = 4.451×2.13 ×1 + 0.2(0.4-0.07)×25×1.1×1 = 11.295 /
1 = 
= 
= 84.23
Mb = - 
= - 
= - 65.59
M2 = -Mc = 
= 
= 56.84
1 = -0.425 × 
+ 
= -0.425 × 6 5.59 + 
= 31.64
2 = - 
+ 
= - 
+ 
= - 32,48
3 = -Mc + = - 56.84 + = 1.84
Qa = 0.4 (
=0,4× 31,775×5,4 = 68,63
= 0.6 ( =0,6×31,775×5,4 =102,951
= 0.5 (
=0,5×31,775×5,35 =84,99
= - 0.5 ( =0,5×31,775×5,35 =-84,99
: R b = 8.5 ().
: R bt = 0.75 ().
: g b2 = 0.9, E b = 23 103 (M), E s = 2 105 (M).
b'f = b. + 1/3 l . = 200 +1/3×5600 = 2066,7
1) b'f ≤ l =2130 , l =2130
h0 = 
= 
= 0,385 = 38,51
h.= h0 + = 38,51 + 3,5 = 42,01˃ h.=40
h . ( 5) =50 .
:
1 ≤ γb2 × rb×b'f×h'f (h0 - h'f×0,5) = 84.23≤0.9×8500×2,07×0,05(0,385- 0,5×0,05) = 285,04×
, , .
αm = 
= 
= 0,034
3, αm=0,034 ξ =0,035 ζ =0,982
:
As = 
= 
=0,00062= 6,19 2
4 
14III s 6.16 , (6,16 /(6,19:100) = 0,48%
2 = 56,84≤ 1=84,23
, , .
αm = 
= 
= 0,023
3, αm=0,023 ξ =0,023 ζ =0,987
:
As = 
= 
= 0,000416=4,16 2
:
b = 65,59 ×
αm = 
= 
= 0.026
3, αm=0,026 ξ =0,026 ζ =0,988
:
As = = 
= 0,000479 = 4,79 2
|
|
|
2 = - 2,38
1. 5,6 .
4
B×L=6,4×5,6 = 6,4×5,6 =35,84 2
| . , /2 | 
| . , /2 | |
| : | |||
| 2 | 0,05 | 1,2 | 0,06 |
| .. δ=0,05 , ρ=18 /2 : 180,05=0,9 /3 | 0,9 | 1,3 | 1,17 |
| δ=0,15 , ρ=4 /2 : 40,15=0,6 /3 | 0,6 | 1,2 | 0,72 |
| 1 δ=0,025 | 0,025 | 1,2 | 0,003 |
| δ=0,05 , ρ=25 /2 : 250,05=1,25 /3 | 1,25 | 1,1 | 1,375 |
| ∑ | 3,355 |
15
Rb =
1.
