:
∙;
:
∙;
:
)
∙;
) 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∙38,59∙5,552= -24,96∙.
: c =- 2 =-74,29/.
6. (. 4,)
:
QA 
:
Q 
.
:
Q = QC =0,5 q∙l1 =0,5∙38,59∙5,55=107,08
=-84,9∙, b =210 x=0,35.
40 .
h=h0+a =304,6+40=344,6.
h =350 . h/b =350/220=1,6 (1.52,5), , .
9. .
) .
M1 =108,06∙; h =350; ( ). =29 ;
h0 = h-a =350-29=321 .
.
:
;
< 2070 .
.
x = ξh0 =0,037∙321=11,877 
, .. .
2.
:
4Æ16500 s =8042 (+2,14%).
=15+6+16/2= 29 - .
) .
=-84,9 ∙; h =350 ; , b =210 ( .8, ) =28 ; h0=h- =350-28=322 .
: 4 Æ16 500 s =804 2(+10,5%).
=15+6+16/2= 29 .
=29 ; h0=h- =350-29=321 .
: 4 Æ16 500 s =804 2(+10%).
=15+6+16/2= 29 .
) .
2=74,29 ∙.
h =350 ; ( . 8, ); =29 ; h0 =321 .
:
;
.
.
;
x=ξ∙h0 =0,029∙321=9,31 
,
. . .
2.
4Æ14 500 s =616 2(+12,5%).
=15+6+14/2=28. .
:
=28 ; h0 =322 .
:
;
.
.
;
x=ξ∙h0 =0,025∙322=8,05 ,
. . .
2.
4Æ14 500 s =616 2(+12,8%).
|
|
|
=15+6+14/2=28. .
6-7 =-24,96 ∙.
h =350 ; , b =210 ( . 8, ); =28 ; h0 =322 .
; ξ =0,083;
2.
: 2Æ12 500 s=226 2 (+17,9%).
=15+6+12/2=27. .
:
=27 ; h0 =323 .
; ξ =0,081;
2.
: 2Æ12 500 s=226 2 (+17%).
=15+6+12/2=27. .
) .
=- 74,29∙ ;h =350 ; , b =210 ( . 8, ); =28 ; h0= 372 .
, ξ= 0,272
2.
: 4Æ14 500 s =616 2(+0,5%).
=15+6+14/2=28. .
) .
(. 7):
s≥0,25s1=0,25∙786,78=196,692
: 2Æ12 500 s =226 2 (+12,9%)
=15+6+12/2=27. . h0= 323
