50m Tֽ
֧ܿ
԰·ӳYA2.1·߼ܶ50T֧ܿܺϲһͬ50mTֽ֧ܼͼ-07ޣԼ֧ܿܵػм㣺
֧ܿܲ
   ÿƬ50mֽTģ֧4Ƭ45cֳָܣ4Ƭ45cֲָT£ƽ50T·53.74б45cָΪ
·
                650cm         45cָ
վ3߼
               548cm
3߼
642cm                    
 ߼
                665cm
Ҳ
                                45cָ
   45cָΪLmax=665/sin53.74=825cm
ֹ
٢45cָ֣Ix=35280cm4Wx=1570 cm3G=94.5kg/m
               A=120cm2;ÿƬΪ12m(90Ƭ)
ڢ32bָ֣Ix=11600cm4Wx=726cm3G=57.74kg/m
               A=73.56cm2
[40b۸():  Ix=18600cm4Wx=932 cm3G=65.21kg/m
               A=83.07cm2;
ܦ30010ֹ():  G=71.52kg/m   A=91.11cm2;
ݸֹ쵯ģ:E=2.1106kg/cm2=2.1105MPa
֧ܿܺؼ                         
T:
 50TһƬ150tÿTΪ:3t/m5Ƭ45cָȫ֧(ʱ,ֻ4Ƭ45cָֿǣֻ൱мһ뿼) 
ÿƬ45cָÿ׳TΪg1=3t/4=0.75t/m=750kg/m
45cָ:g2=94.5kg/m(ÿƬ)
ģ塢ľ֧ܣȡ1׼㣩
1׳Tģ塢ľ֧Ϊ: 
440kgʽܣ+(330.140.12+330.120.1+40.070.051+40.070.050.5+30.051+40.30.051+620.10.1+160.10.051+0.027.51)(ľа)1000kg/m3=1000.2kg
 1׳T¾Ե塢ˮΪ2.7210.011500kg/m3=40.8kg
  ÿƬ45cָÿ׳ܵģ塢ľ֧ܡԵ塢ˮΪ
g3=1000.2+40.8/5=208.2kg/m
    ʩ(ȡ3׿24.25׳)350kg/m2,:
    4Ƭ45cÿʩΪ31350=1050kg
     ÿƬ45cָÿ׳ʩΪ
g4=1050/4=262.5kg/m
     50TÿƬ45cָܳܺΪ:
     q=g1+g2+g3+g4=750+94.5+208.2+262.5=1315.2kg/m
50TȢ45c:
һƬ45cͼ:


 
A һƬֵָ:ȡ8.25һ簴֧м㣩
ٿأ
M=qL2/8
=1315.28.252/8=11189.475kg-m
=1118947.5kg-cm
F=qL/2=1315.28.25/2=5425.2kg()
߼:
  F=qL=1315.216.21/2=10659.7kg(֧)
B ǿȼ㣺
=M/Wx=1118947.5/1570=712.7kg/cm2=71.27Mpa
         <[]=210MpaQ235֣      (ǿȿ)
C  Ӷȼ㣺
fmax=5qL4/384EI=513.1528254/(3842.110635280)=1.07cmf=L/400=825/400=2.06cm 
                                   (Ӷȿ)
D м㣺
      м֧ߢ45cֵָļӦΪ:
max=F/A=10659.7/120=88.83kg/cm2=8.883N/mm2
ӡ=110 N/mm2
  45cֺ: 
ƽͼ(ȡмһӡм)ǵֻ֧ܿ3ƬT ֽʩ˺ͼ£

 
B-C㣺(֧򻯼)
    B-C֧
Rb=Rc=F0.64+1.5+2+2.5+2.84/4=F9.48/4=10659.79.48/4=25263.5kg
߿(A-BC-D)֧:
Rb=Rc=F(1.91+2.77+3.27+3.77)/4=10659.711.72/4=31232.9kg
BC֧ΪRmax= Rb+ Rb=25263.5kg+31232.9kg=56496.4kg
ʵϣ֧ܿϵTƬֽTԤӦɺ󣬲ŽһƬTʩTѴŶϣʱ֧ղٳTغأ
BC֧ΪRmax=31232.9kg
B-Cؼ:
M =RbС2-F(0.5+1.36)
=25263.52-10659.71.86
=50527-19287.042=30699.958kg-m=3069995.8kg-cm
B-C(245c)ǿȼ㣺
=M/Wx=3069995.8/21570=977.71kg/cm2=97.71Mpa
         <[]=200MpaQ235֣      (ǿȿ)
B-C(245c)Ӷȼ:
Ϊ˼򻯼,B-Cϵļкػ߲:
q=F/L=9F/L=410659.7/4=10659.7kg/m
=106.597kg/cm
ӶΪ:
fmax=5qL4/384EI=5106.5974004/(3842.1106352802)=0.24cmf=L/400=400/400=1cm 
            (Ӷȿ)
ȶԼ㣺
ѹȶN/Amܦ1[]
,֪ΪNmax=56496.4kg
300ȶ㣺
Am=(D2-d2)/4=(302-282)/4=91.1cm2
ת뾶i=D2+d21/2/4=302+2821/2/4=10.259cm
ɳȣL=750cm
೤ϸȣ=L/i=750/10.259=73.1
4-66ȶϵ10.731Q235֣
1[]=0.731200=146.2Mpa
=N/ Am=56496.4kg /91.1=620.16kg/cm2=62.016Mpa
1[]=146.2Mpa(300ֹȶԿ)
ȶҪ
ն㣺Ź桷й涨еѹ䳤ϸȲôϸ[]=100=73.1100ʸնҪ
  2[40bĸʽȶ:
2[40b漸Ϊ
A֫[40b          A1=83.07cm2
  Ծ        I y1 =640cm4
֫ת뾶  i1=I y1/ A11/2=640/83.07 1/2=2.78cm
֫ϸȣ1=L1/ i1=130/2.78=46.76ע⣺Ҫ󺸽Ƭ[40b۸ֵľ벻1.3]
 
 B˫֫2[40b
      Am=83.072=166.14 cm2
 Ծ  I y=640+17.56 283.072+21403/12=63176.5 cm4
ת뾶  iy=I y/ Am1/2=63176.5/166.141/2=19.5cm
ϸ    y=L0/ iy=750/19.5=38.46
㳤ϸȦhy=y 2+1 21/2=38.46 2+46.76 21/2=60.54
     hy=60.54æ10.777Q235֣
1 []=0.777200=155.4Mpa
=N/ Am=56496.4kg /166.14=340.1kg/cm2
=34.01Mpa1 []= 155.4Mpa(ȶԿ)
ȶҪ
ն㣺hy=60.54[]=100ʸնҪ
 2[30ĸʽT͸ܣȶ:
2[30漸Ϊ
A֫[40          A1=40.47cm2
  Ծ        I y1 =326.6cm4
֫ת뾶  i1=I y1/ A11/2=326.6/40.47 1/2=2.84cm
2[30ĸʽ߰Ϊ25025010mmΪ0.56mľΪ0.81m
֫ϸȣ1=L1/ i1=56/2.84=19.71
 
 B˫֫2[30
      Am=40.472=80.94 cm2
 Ծ  I y=326.6+12.16 240.472+21253/12=15225.6 cm4
ת뾶  iy=I y/ Am1/2=15225.6/80.941/2=13.7cm
ϸ    y=L0/ iy=770/13.7=56.2
㳤ϸȦhy=y 2+1 21/2=56.2 2+19.71 21/2=59.6
     hy=59.6æ10.809Q235bࣩ
1 []=0.809200=161.8Mpa
=N/ Am=26649.25kg /80.94=329.25kg/cm2
=32.925Mpa1 []= 161.8Mpa(ȶԿ)
ȶҪ
ն㣺hy=59.6[]=100ʸնҪ

ػ
1·Ӫг꣬·ʯۣʵȽϸߣӱȫĽǶȳǰÿƽ׳12t㡣
ãTƬֽʩʱ߼мܺ,(֧)Ϊ31232.9kg(31.2329t)
㷽һ:
λȼ1mÿ淨Ϊ50cm50cm20mmְ壩»£Ի



 
ϵӷְԵ11ɢλĳΪL=0.5+1+1=2.5m
ÿӦѹΪA=2.5m1.5m=3.75O
ػӦΪ=31.2329/3.75=8.329t/O12t/·        (ػҪ)
ؼԶŻ,:
:G1=[(0.32-0.282)С7.5/4+0.50.50.022]7.85=0.615t
¸ԶŻ:G2=2.51.512.5=9.375t
ԻܺΪ:
G=31.2329+0.615+9.375=41.2229t
ػӦΪ=41.2229/3.75=10.993t/O12t/·        (ػҪ)
㷽:
WinkerԵػۣµػlL/4ʱƵػΪʱԿԸԡlܦL/4׵ػӦ㣺
L=1/
=kb/4EI1/4
ʽУkΪϵ·Ӳȡk=40N/cm3
      bΪλb=1.5m
      EΪŵĵģC20E=2.55106N/cm2
      IΪλĽԾأI=bh3/12=1501003/12=12500000cm4
=kb/4EI1/4=40150/42.55106125000001/4
 =0.0026195 (cm)-1
L=1/=1/0.0026195=381cm
ʱλɰԻ㳤Ϊ
lܦL/4=С381/4=299.2cm
l=299.2cmŵµػ:
Ӧѹ
A=2.992m1.5m=4.488O
µػӦΪ=31.2329/4.488=6.959t/O12t/·        (ػҪ)
ؼԶŻ,:
:G1=[(0.32-0.282)С7.5/4+0.50.50.022]7.85=0.615t
¸ԶŻ:G2=2.991.512.5=11.213t
ԻܺΪ:
G=31.2329+0.615+11.213=43.0609t
ػӦΪ=43.0609/4.488=9.595t/O12t/·        (ػҪ)
ʩ
ʩһ
֧ܿƬ50mTͬʱţƬTֽʩ
ʩ
ǵվ͸ҲλڱϣΪֹ廬ڿ׮ʩΪλװ8.0mæ1.2m5.0mڿ׮ڿ׮¶1.5ڿ׮ֽλС
Ŀ
ǵ45cָȱ̫࣬Ϊ˳ñ˾вϽ±
ٽÿԭ4ױΪ3ף
ڽ·ࡢҲվ߼ԭ245cΪ1H588300H͸֣мԭ245cΪ1H440300H͸֣
۽վϷ45cָΪ1H440300H͸֣ԭÿƬT4Ƭ45cֱָΪ3ƬH440300H͸֡
ܸ߼ͻΪ׮Ħ1.2mڿ׮׮4ף
㣺
H440300ֺ: 
ƽͼ(ȡмһӡм)ǵֻ֧ܿ3ƬT ֽʩ˺ͼ£
H440300:Ix=56100cm4  Wx=2550cm3
 B-C㣺(֧򻯼)
    B-C֧
Rb=Rc=F0. 4+1.04+1.5+2.0+2.86/3=10659.70. 4+1.04+1.5+2.0+2.86/3=26649.25kg
߿(A-BC-D)֧:
Rb=Rc=F(0.42+1.28+1.78+2.28)/3=10659.7(0.42+1.28+1.78+2.28)/3=20466.6kg
BC֧ΪRmax= Rb+ Rb=26649.25kg+20466.6kg=47115.85kg
ʵϣ֧ܿϵTƬֽTԤӦɺ󣬲ŽһƬTʩTѴŶϣʱ֧ղٳTغأ
BC֧ΪRmax=26649.25kg
B-Cؼ:
M =RbС3/2-F(0.5+1.36)
=25263.53/2-10659.71.86
=20146.833kg-m=2014683.3kg-cm
B-C(245c)ǿȼ㣺
=M/Wx=2014683.3/2550=790.07kg/cm2=79.007Mpa
         <[]=170MpaQ235֣      (ǿȿ)
B-C(245c)Ӷȼ: 
Ϊ˼򻯼,B-Cϵļкػ߲:
q=F/L=4F/L=410659.7/3=14212.93kg/m
=142.1293kg/cm
ӶΪ:
fmax=5qL4/384EI=5142.12933004/(3842.110656100)=0.1274cmf=L/400=300/400=0.75cm             (Ӷȿ)
㣺
 2[30ĸʽT͸ܣȶ:
2[30漸Ϊ
A֫[40          A1=40.47cm2
  Ծ        I y1 =326.6cm4
֫ת뾶  i1=I y1/ A11/2=326.6/40.47 1/2=2.84cm
2[30ĸʽ߰Ϊ25025010mmΪ0.56mľΪ0.81m
֫ϸȣ1=L1/ i1=56/2.84=19.71
 
 B˫֫2[30
      Am=40.472=80.94 cm2
 Ծ  I y=326.6+12.16 240.472+21253/12=15225.6 cm4
ת뾶  iy=I y/ Am1/2=15225.6/80.941/2=13.7cm
ϸ    y=L0/ iy=770/13.7=56.2
㳤ϸȦhy=y 2+1 21/2=56.2 2+19.71 21/2=59.6
     hy=59.6æ10.809Q235bࣩ
1 []=0.809200=161.8Mpa
=N/ Am=26649.25kg /80.94=329.25kg/cm2
=32.925Mpa1 []= 161.8Mpa(ȶԿ)
ȶҪ
ն㣺hy=59.6[]=100ʸնҪ

禵1.2mڿ׮׮4ף׮
·ƹ淶,ڿ׮Ϊ:
P=0.5Ufili+Aҡ
ʽ: ҡ=0+k2r2(h-3)=70+1.51.7(4-1)
            =95.5(KPa)
       ··fi=55(KPa)
P=0.5Ufili+Aҡ
=0.51.2С554+1.22С95.5/4=522.69KN
=52.269t
ȥ׮غڿ׮Ϊ:
52.269t-1.22С42.5/4=40.96t

