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, .

140-98 ( f=0,24 2, q=725 /2).

Q, , 10 . , 2,

F= Q/q ,

 

q , /2

 

q = q (Δt/70)m*(G /360)p

m , -, 1,3;

P , G 60 / -, 0,02

Δt (t..-tint), º,

t..- , º;

tint , º.

 

t.. , , 2 º.

:

 

t. i= t -2

: - , , ;

β1 140; β1 =1,05

β2 ; β2 =1,02

Gm , , /, :

Gcm =

 

Gcm =(3,6*2030*1,05*1,02)/[4,19*(105-2-70)]=56,6 /

 

t 11-2 =105-2-(3,6*560*1,05*1,02)/(56,6*4,19) = 93,9 º

t 21-2 =105-2-(3,6*420*1,05*1,02)/(56,6*4,19) = 96,17 º

 

t 1-2 =(93,9+96,17)/2 = 95,035 º

 

t 1 =(103+93,9)/2 = 98,45 º

t 2 =(103+96,17)/2 = 99,585 º

t 3 =(95,035+70)/2 = 82,52 º

t 4 =(95,035+70)/2 = 82,52 º

 

 

Δt=t. . - tint, º

 

 

, /, . :

G =G cm * α =56,6*0,5= 28,3 /

 

:

 

q 1= 725*[(98,45-20)/70]1,3*(28,3/360)0,02=799,08 /2

q 2= 725*[(99,585-20)/70]1,3*(28,3/360)0,02=814,14 /2

q 3= 725*[(82,52-20)/70]1,3*(28,3/360)0,02=594,9 /2

q 4= 725*[(82,52-20)/70]1,3*(28,3/360)0,02=594,9 /2

 

:

F1= Q/q = 560/799,08 = 0,70 2

F2= Q/q = 420/814,14= 0,52 2

F3= Q/q = 630/594,9 = 1,06 2

F4= Q/q = 420/594,9 = 0,71 2

 

, , :

n= (F * β4 )/(fc* β3)

 

β4 - , : β4 =1,05

β3 , :

β3=0,97+0,06/ F

 

 

β3.1=0,97+0,06/ 0,70=1,06

β3.2=0,97+0,06/ 0,52=1,09

β3.3=0,97+0,06/ 1,06=1,03

β3.4=0,97+0,06/ 0,71=1,05

 

:

 

n1= F1* β4/(f3.1)= 0,7*1,05/(0,24*1,06) =2,89 = 3;

n2= F2* β4/(f3.2) = 0,52*1,05/(0,24*1,09) =2,09 =2;

n3= F1* β4/(f3.3)= 1,06*1,05/(0,24*1,03) =4,5 =5;

n4= F2* β4/(f3.4) = 0,71*1,05/(0,24*1,05) =2,96 = 3;

:

 

U= (t - t)/ (t t)*1,15 = (150 - 105)/(105 - 70)*1,15 = 1,48,

 

t , º.

, , /,

 

G =3,6 Q/(*(t t)*1000) =

3,6*24520/(4,19*(105-70)*103) = 0,602 /;

 

Q = 24520 , .

, :

 

d = 15.5* (G 2/ ΔH)1/4 = 15,5*(0,6022/6,19)1/4 =7,62

 

ΔH=Σ(R*l+Z) =6,19 , .

: .. d <18 1;

, , :

 

d = d/(1+ U) = 7,62/(1+ 1,48)= 3,07

 

, :

 

Δ=6,28*G2/ d4 = 6,28*0,262/ 0,3074 = 47,79 .

G , /;

d = 0,32 , .

 

G= 3,6* Q/(*(t t)*1000) = 3,6*24520/(4,19*(150-70)*103)=0,26 /





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: 2016-10-27; !; : 919 |


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