a=s/Eb =1,9*105 /0,29*105 =6,55
a*Asp=6,55*9=58,9 2.
red=A+a*Asp+a*A¢sp+a*As+a*A¢s= 146*3,8*2 +(22 3,8 -3,8)*46+58,9+5,87*1,29*2= =1845,62
:
Sred=S+aSs0,1+aS¢s0,1+aSs0,2+aS¢s0,2
Sred=146*3,8*(22-1,9)+146*3,8*1,9+58,9*3+5.87*1.29*3+5.87*1.29*20=12520,1 3
y0= Sred/Ared=12520,1/1845,6=7 ; h-y0=22-7=15
Ired=I+aAspy21+aA¢spy¢21+aAspy22+aA¢spy¢22
y1=7-3=4 ; y¢1=0; y2=7-2=5; y¢2=15-2=13
Ired=146*3,83/12+146*3,8*13,12+146*3,83/12+146*3,8*5,12+45,9*14,43/12 +45,9*14,4*42 +41,07*42 +5,87*1,29*52 +5,87*1,29*132 =135098 4
Wred= Ired/y0=135098/7=19300 3
,
W¢red= Ired/(h0-y0)=135098/(22-7)=9007 3
, ()
r=jn(Wred/Ared)=0,85*19300/1845=9
jn=1,6-sb/Rb,ser=1,6-0,75=0,85
, ()
rinf=0,85*9007/1845=4,2
. ssp 0,6Rsn=0,6*590=354.
jsp=1. :
- s1=1
ssp=0,03*354=10,62
- s2=0, .
- :
P1=As(ssp-s1-s2)=9(354-10,6)*100=309
- P1
0=y0-ap=7-3=4 ;
sbp/Rbp£0.75; Rbp=sbp/0,75=2,31/0,75=3,1 <0.5 B 30=15
sbp/Rbp=2,31/15=0,1
P1 ( ).
sbp/Rbp=2,04/15=0,1<a=0.25+0.025 *Rbp=0,25+0,025*15=0,63 ( <0.8) :
s6=0,85*40 sbp/ Rbp=0,85*40*0,173,4
slos1=s1+s2+s6=10,6+0+3,4=15
slos1 sbp
P1=As(ssp-slos1)=(354-15)*100*9 =305 H
sbp=(305000/1845)+(305000*42/135098)= 1,7
sbp/Rbp=1,7/15=0,1
:
s8=35 ( 2,11)
sbp/Rbp=0,1<0,75 k=0,85 , :
|
|
s9=150ksbp/Rbp=150*0,85*0,1=12,75
slos2=s8+s9=35+12,75=47,75
slos=slos1+slos2=15+47,75=62,75<100 .
slos=100 .
P2=As(ssp-slos)=9(354-100)*100=228600 =228,6