, .
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/(f*β3.1)= 0,7*1,05/(0,24*1,06) =2,89 = 3;
n2= F2* β4/(f*β3.2) = 0,52*1,05/(0,24*1,09) =2,09 =2;
n3= F1* β4/(f*β3.3)= 1,06*1,05/(0,24*1,03) =4,5 =5;
n4= F2* β4/(f*β3.4) = 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 /