.
.
2.1 :
3 =0,85 ( ).
500 500. ( ).
25 γb1 =1,0 Rb =14,5 , Rbt =1,05 .
: b =220 ; h =500; S = 2,0 ; h = 70 .
. 2.2 :
hr = 1/9 l = 1/9∙6000=667 ,
hr =700 > h +150 =500+150=650 ;
b =(0,4-0,5) hr =(0,4-0,5)∙700=280-350 ,
b =300 .
2.2
l1=l - b =5,85-0,3=5,55 .
2.3
) ( γf =1,1 γn =1,0).
g0 , 1.1:
g0 =4,68 /2.
, :
gp = γf (h - h)∙ b ρ=1,1∙(0,50-0,07)∙0,22∙25=2,48 /.
γn =1,0 :
gp = γn∙ (g0∙S + gP)=1,0∙(4,68∙2,0+2,48)=11,84 /
) ( γf =1,2; 3 =0,85 γn =1,0) :
= γn∙3∙ γf n∙S =1,0∙0,85∙1.2∙13,5∙2,0=27,54 /.
) :
q = g+ =11,84+27,54=39,38.
2.4
:
∙;
:
∙;
:
)
∙;
) 6 7
β p/g = 2,5 . 1:
6: β6 = 0,033;
7: β7 = 0,009.
6-7:
6-7 = β∙q∙l12 =-0,021∙39,38∙5,552= -25,47 ∙.
: c =- 2 =-75,81 /.
1. (. 4,)
:
QA 
:
Q 
.
:
Q = QC =0,5 q∙l1 =0,5∙39,38∙5,55=109,28.
2.
=-86,64∙, b =210 x=0,35.
40 .
|
|
|
h=h0+a =306,69+40=346,69.
h =350 . h/b =350/220=1,6 (1.52,5), , .
.
:
hr = 1/9 l = 1/9∙6000=667 ,
hr =700 > h +150 =350+150=500 ;
b =(0,4-0,5) hr =(0,4-0,5)∙700 =280-350 ,
b =300 .
3.
l1=l - b =5,85-0,3=5,55 .
4.
) ( γf =1,1 γn =1,0).
g0 , 1.1:
g0 =4,68 /2.
, :
gp = γf (h - h)∙ b ρ=1,1∙(0,350-0,07)∙0,22∙25=1,69/.
γn =1,0 :
gp = γn∙ (g0∙S + gP)=1,0∙(4,68∙2,0+1,69)=11,05 /
) ( γf =1,2; 3 =0,85 γn =1,0) :
= γn∙3∙ γf n∙S =1,0∙0,85∙1.2∙13,5∙2,0=27,54 /.
) :
q = g+ =11,05+27,54=38,59.
