悬挑式脚手架安全专项施工方案

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42******⚗kᢧmnopTᐰq⚗Grᫀ1ஹ₹njᦪnopὶ᫡⌴F(kN)122ஹ□qKI᪀⌼jᦪᥛ᪷ᩚᔣᡈ᣸Lb(m)0.8ᑁ᣸ᜋa(m)0.3□L(m)3MᑮQḄDi(m)2.90ᑮQḄD2(m)1Pᑮ#$ᱥ0Ḅ2D3(m)3ஹ□qKIᩞᧇjᦪ&16a&'()&6x19*ஹ□,-./□0ᵨ23#$ᱥ45637,-ᩩ59:;<Ḅ6=᫡஺@☢BឋDI=866.2cm4,@☢EᢙDW=108.3cm3,@☢HA=21.95cm2o34

43******⚗KLᢧNOPᐰR⚗STUᫀ12kN12kN0.20SkN/m0.203kN/mফ1ஹKIrstNOὶ᫡⌴F=12kN;./᫡XY₹[q=1.2x17.23x9.8x10-3=0.203kN/m\]6=᫡Ḅ,-^ᑮ35

44******⚗KLᢧNOPᐰR⚗STUᫀ9.058.%_203327-15.27`a(kN)6.16S4.633-3.897bDa(kN-m)Ḅᥛ9RA=9.253kN;<3ᜐḄᥛ9RB=15.356kN;ᨬᜧbDMax=6.168kN-m;maf|MP|=(DIXDI+D2XD+DXD3+1.414XDXD)I/2=(2.9X2.9+1x1+2x2+1.4142xlx2)l/2=23234.03maf

45******⚗KLᢧNOPᐰR⚗STUᫀ?mmḄᨬᜧi,-jo=57.877N/mm2<[f]=215N/mm2,kl⌕no2ஹKI᦮v+ឋt./0ᵨ16a&'(p-ᙳᒴbrḄsb᪀5᦮vwxyᦪ7ᢥ᯿},-~b(p=(570tb/lh)x(235/f)by=570x10x63x235/(3xl03x2x160x235)=0.374\],-^ᑮᨬᜧio=Max/((pbWx)=6.168x106/(0.374x108.3x1()3)=152.25N/mm2mḄᨬᜧi,-jo=152.25N/mm2<[f]=215N/mm2,kl⌕no3ஹc\xyt(ᩚ)Ḅh96.429kN᝞☢0ᵨ7Ḅ,-~[F]=aF/Kggᐸf[FJ-Ḅ(kN)F-Ḅẚ(kN)g,-f=0.5(]2,d9(mm)a-Ḅ₹[ᙳᒴyᦪ76x19ஹ6x37ஹ6x61ᑖ0.85ஹ0.820.8K-ᵨPᐰyᦪ78஺,-f[Fg]6.429kN,a=0.85,K=8,^ᑮ~d=llmm஺⌱6x197ᨬᜧ12mm¡¢kl⌕noIzc\(|cᩚ)ḄLxyt9lo=N/A<[f]ᐸf[f]9£¤ᢙ¥7[H=65.00N/mm2,g¦£¤ᢥ᯿¦@☢,-ᡠ◤⌕Ḅ(ᩚ)Ḅ£¤ᨬD=(2XT/[f]/7i)°-5=(2x6.429x103/65/3.142)l/2=8mm37

46******⚗KLᢧNOPᐰR⚗STUᫀ4ஹKIᱥ$Ḅt./᫡©ª«0ᵨ32¬7bD`ᐳ®¯ᵨḄ32¬,-᝞}~32¬ᙠ±i©`i¯ᵨ,-9o=N/Af=F/A(02+3^),/2

47******⚗KLᢧNOPᐰR⚗STUᫀ:ஹÄÅÆᦪ1ஹÄÅÆᦪ□ᜐÇ᫡LᢧUὶ᫡Lᢧ#$ᱥ□ᜐP90᫡/ª«ÉÊË¥ÌÍC30□ÎÏᔲᨵÇ᫡ᔲ2ஹᩚ₹[ÆᦪÒÓ᣸ᩚᜋa(m)₹[᪗ÕjF'(kN)₹[Ã,jF(kN)10.3911.421.1911.43ஹ᜜᣸ᩚ×Ø&᜜᣸ᩚ×lai(m)10.821.531.241.5*ஹÇ᫡ÙÚÛÜ<ÆᦪÇ᫡Ç᫡XᑁÜ<ÞßᑁÜ<ᙶ᪗x(m).y(m)a()Ç᫡Ü

48******⚗KLᢧNOPᐰR⚗STUᫀâஹὶ᫡ã-ὶ᫡ᩞᧇæ'ὶ᫡ᩞᧇ()10&'ὶ᫡@☢HAGm?)12.74ὶ᫡@☢BឋDlx(cm4)198.3ὶ᫡@☢EᢙDWx(cn?)39.7ὶ᫡XY᪗Õjgk(kN/m)0.1ὶ᫡ᩞᧇᢙb¥Ã,j205ὶ᫡ᩞᧇᢙ`¥Ã,j125[f](N/mm2)[x](N/mm)ὶ᫡çឋèéE(N/mm2)206000ὶ᫡ᐕᢰ[l>]1/4001,᣸ᩚᜐḄὶ᫡t,-ìa᝞}:11.4kN11.4kN11.4kN11.4kN0.12kN/mJIIIIIIIIIIIIIIIIHIII0.I1I2kINI/mIIIIIIImimi11₢পಟ1949225140

49******⚗KLᢧNOPᐰR⚗STUᫀ₹[᪗Õj~q-gk=O.lkN/mR7=Fi=9kN₹[Ã,j~q=1.2xgk=1.2x0.1=0.12kN/mR=Fi=11.4kN1)ᢙbã-o=M/W=4.232x106/(39.7X103)=106.599N/mm2<[f]=205N/mm2max⌕2)ᢙ!9.6079.5170.5680.388-1.883-11,012>11,066Vax=H.066kNmTmaxVx/(8I8)[bho2-(b-8)h2]=ll.O66xlOOOx[48xlOO2-(48-5.3)x832]/(8x1983000x5.3)=2maz4.459N/mm2<[T]=125N/mm241

50******⚗12ᢧ45678ᐰ:⚗;<=ᫀ⌕3ᢰ@!-1.956Vmax=l.956mm<[v]=la/400=2251/400=5.628mm⌕4BCDEF!GHIᵨ᩽▲M᝱OPR'iA=9.452kNUR'iB=16.335kNUR'ic=10.633kNUXYZE᩽▲M᝱OPRiA=H.968kNURiB=20.673kNURic=13.463kNU2,[\᣸^ᩚᜐḄὶ᫡F!F!de᝞OP11.4kN11.4kN11.4kN11.4kN11.4kNj0112kM/m110.12kN/mপ(2)2288271242

51******⚗12ᢧ45678ᐰ:⚗;<=ᫀ₹Y᪗ijPq-gk=O.lkN/mRm=Fi=9kN₹YoFjPq=1.2xgk=1.2x0.1=0.12kN/mR=Fi=11.4kN1)ᢙ(to=M/W=5.214x106/(39.7X103)=131.335N/mm2<[f]=205N/mm2max⌕2)ᢙV(t19.7438.3438.1965.2685.1721-77^-3.2036228-6.406V=19.744kNmaxTmaxVx/(8I8)[bho2-(b-8)h2]=l9.744x1000x[48x1002-(48-5.3)x832]/(8x1983000x5.3)=4maz3,64N/mm2<[T]=l25N/mm243

52******⚗12ᢧ45678ᐰ:⚗;<=ᫀ⌕3)ᢰ@!■4.667Vmax=4.667mm<[v]=l/400=2712/400=6.78mma⌕4BCDEF!GHIᵨ᩽▲M᝱OPR'A=13.163kNU2R'2B=20.661kNUR'c=11.675kNU2XYZE᩽▲M᝱OPR2A=16.668kNURB=26.15kNU2R2c=14.782kNUrஹt᫡!1ஹ1ut᫡!t᫡ᩞᧇxyz{t᫡ᩞᧇ|}16uz{t᫡~☢A(cm2)25.15t᫡~☢ឋI(cm4)934.5xt᫡~☢ᢙW(cm3)116.8xt᫡᪗ijgk(kN/m)0.197t᫡ᩞᧇᢙ@oFj215t᫡ᩞᧇᢙ@oFj125f(N/mni)T(N/mm2)44

53******⚗12ᢧ45678ᐰ:⚗;<=ᫀt᫡ឋE(N/mm2)206000t᫡ᐕᢰ@[x)](mm)1/25012731ut᫡e₹Y᪗ijPq'==0.197kN/mgk[᣸^ᩚᜐPPr=RiA=9.452kNU[\᣸^ᩚᜐPP=R'2A=13.163kNU2₹YoFjPq=1.2x=l.2x0.197=0.236kN/mgk[᣸^ᩚᜐPPi=Ri=11.968kNUA[\᣸^ᩚᜐPP2=R2A=16.668kNU⌕45

54******⚗12ᢧ45678ᐰ:⚗;<=ᫀy{2ᢧ567(ᡷ4)F!F!P1ஹ;<5678ᐰᢈ᪗iGB51210-20162ஹ;<ᡷ4{5678ᐰᢈ|JGJ130-20113ஹ;<4{5678ᐰᢈ|JGJ128-20104ஹ¡᪀₹Y|GB50009-20125ஹ{¡᪀oF|GB50017-20036ஹ£¤¥¡᪀oF|GB50010-20107¦!ஹ567§ᦪᔂ₹oª«¡᪀⌕ឋ¬ᦪY015678ᐰ®II®567¯o᣸ᦪ°᣸567567{xyজ48x2.75677¦±@H(m)18^ᩚ²³h(m)1.8^ᩚ´³ᡈ¶³la(m)1.5^ᩚ·³lb(m)0.85·ᔣ¹ºᩚF!᜜¼½@ai(m)0.1ᑁ^ᩚ¿ᱥ³¿a(m)0.3°^ᩚF!=ÁÂoª°^ᩚ\ஹ₹YoF567oFxy¡᪀56756Ãxy{ÄÅ56Ã᪗ijGkjb(kN/m2)0.1556ÃÆo=42²1oÇ148ᐰ^Å᪗ij0.01ᢱ5Ãxyᩈᢱ5ÃGkmw(kN/m~)ÊᩚËᢱ5Ã᪗ij0.17ᢱ5ÃÆo=46²1oGkdb(kN/m)ÌÍ^ᩚXΡ᪀᪗ij0.12¡᪀567ÏÐÑᦪnjj146

55******⚗12ᢧ45678ᐰ:⚗;<=ᫀgk(kN/m)¡᪀567₹Y᪗ij3ᙢÓrÔᡂÖ×Gkjj(kN/m2)8ᐰÅoªᐰØÙÚÛÜÝcoo(kN/m2)0.2Ü₹Y¦y¬ᦪ□1Üݱ@ßᓄ¬ᦪr(áᜋஹᓫ0.555,0.51^ᩚäåឋ)Ü₹Y᪗ij3k(kN/n?)(áᜋஹ0.111,0.102ᓫ^ᩚäåឋ)F!de:P5DC4^☢e47

56******⚗12ᢧ45678ᐰ:⚗;<=ᫀçஹ·ᔣ¹ºᩚ!´ஹ·ᔣ¹ºᩚèª=4·ᔣ¹ºᩚᙠ´ᔣ¹ºᩚê·ᔣ¹ºᩚ᪷ᦪn2ê·ᩚᢙ@oFjfKN/mn?)205·ᩚ~☢ឋI(mm4)98900·ᩚឋE(N/mm2)206000·ᩚ~☢ᢙW(mn?)412048

57******⚗12ᢧ45678ᐰ:⚗;<=ᫀ·ᔣ¹ºᩚ´ᔣ¹ºᩚ^ᩚ^ᩚ·³h´ஹ·ᔣ¹ºᩚèªXYZE᩽▲M᝱q=1.2x(0.03+Gkjxl/(n+1))+1.4xGxl/(n+1)=1.2x(0.03+0.15x1.5/(2+1))+1.4x3x1.5/baka(2+l)=2.226kN/mGHIᵨ᩽▲M᝱q'=(0.03+GkjhXl/(n+1))=(0.03+0.15x1.5/(2+1))=0.105kN/maF!de᝞O:38so49

58******⚗12ᢧ45678ᐰ:⚗;<=ᫀ1ஹᢙ!Max=max[qlb2/8,qai2/2]=max[2.226xO.852/8,2.226x0.12/2]=0.201kN-mmo=yoMx/W=lx0.201xl06/4120=48.798N/mm2<[f]=205N/mm2ma⌕2,ᢰ@!vx=max[5q,lb4/(384EI),maq'ai4/(8EI)]=max[5x0.105x8504/(384x206000x98900),0.105xl004/(8x206000x98900)]=0.035mmvax=0.035mm<[v]=min[lb/150,10]=min[850/150,10]=5.667mmm⌕3ஹBCDEF!XYZE᩽▲M᝱Rax=q(lb+ai)2/(21b)=2.226x(0.85+0.1)2/(2x0.85)=1.182kNmGHIᵨ᩽▲M᝱Rax-q'(lb+ai)2/(21)=0.105x(0.85+0.1)2/(2x0.85)=0.056kNmbrஹ´ᔣ¹ºᩚ!XYZE᩽▲M᝱ᵫê⁚îïFl=Rmax=1.182kNq=1.2x0.03=0.036kN/mGHIᵨ᩽▲M᝱ᵫê⁚îïFi'=Rmax'=0.056kN50

59******⚗12ᢧ45678ᐰ:⚗;<=ᫀq'=0.03kN/m1ஹᢙ!F!de᝞O:1.182kN1.182kN1.182kN1.182kN1.182kN1.182kN0.036kN/m0.036kN/m]]]]]]পবe(kN.m)o=Y()Mx/W=1x0.481x106/4120=116.666N/mm2<[f]=205N/mm2ma⌕2ஹᢰ@!F!de᝞OP0.056kNO.OSGkN0.056kN0.056kN0.056kN0.056kN0.03kN/m10.03kN/m0.03kN/m,111111111111m‘mill’III11II£«®®1500}1500}150051

60******⚗12ᢧ45678ᐰ:⚗;<=ᫀ-0.229ßñe(mm)Vmax=0.229mm<[v]=min[l/150,10]=min[1500/150,10]=10mma⌕3ஹBCDEF!XYZE᩽▲M᝱Rmax=2.738kNòஹᡷᢙóXYE!·ᩚË^ᩚáô=4ᓫᡷᡷᢙóõᢚ÷¬ᦪ0.9ᡷᢙóXYE!P·ᔣ¹ºᩚPRmax=1x1.182kN

61******⚗12ᢧ45678ᐰ:⚗;<=ᫀᓫᑁ^ᩚPNik=2.446kNG2ஹ56ÃḄ᪗ijNG2klᓫ᜜^ᩚPNki=(H/h+1)xlax(l+a,)xGx1/2/2=(18/1.8+l)x1.5x(0.85+0.1)x0.15x1/2/2=0.588G2bkjbkN1/2⊤ü56Ã2²1oᓫᑁ^ᩚPNG2ki=0.588kN3ஹÊᩚËᢱ5Ã᪗ijNG2k2ᓫ᜜^ᩚPNG2k2=(H/h+1)xlaxGkdbX1/6=(18/1.8+1)x1.5x0.17xl/6=0.468kN1/6⊤üᢱ5Ã6²1o4ஹýþᩞᧇḄ᪗ijNG2k3ᓫ᜜^ᩚPNG2k3=GkmwXlaxH=0.01x1.5x18=0.27kN5ஹ᪀ÿ
᪗NG2kᓫ᜜ᩚNk=N2kτ+NG2k2+NG2k3=0.588+0.468+0.27=1.325kNG2GᓫᑁᩚN2k=N2ki=0.588kNGGᩚ₹᜜ᩚNQτ=lax(l+ai)x(jxGkii)/2=1.5x(0.85+0.1)x(1x3)/2=2.137kNkbnjᑁᩚN=2.137kNQlkᔠ₹ᵨᓫᩚᔣᓫ᜜ᩚN=1.2x(Nik+N2k)+1.4XNQI=1.2x(2.446+1.325)+GGk1.4x2.137=7.518kNᓫᑁᩚN=1.2x(Nik+N2k)+1.4xNik=1.2x(2.446+0.588)+GGQ1.4x2.137=6.633kNஹᩚឋ"#$%%&'(H18ᩚ)(*ᦪH1.5ᩚ,☢.ᢙ0W(mm^)4120ᩚ,☢1234i(mm)1653

62******⚗89ᢧ;#$%<ᐰ>⚗?ᫀᩚᢙAB(CfRN/mm?)205ᩚ,☢☢DA(mm^)384EᜋGH?;IJKL1ஹᩚ(tᩚ)(lo=Kgh=1x1.5x1.8=2.7m)[\X=l()/i=2.7x103/16=168.75<210fg⌕ijr᪀Ḅv+ᦪtᩚ)(lo=Kgh=l.155x1.5x1.8=3.119m)[\k=lo/i=3.119x103/16=194.906nopr⊤Auv(p=0.1912ஹᩚv+ឋ(tᔠ₹nᵨᓫᩚḄyA᪗N'=Nik+N2k=2.446+1.325=3.771kNGGᓫᩚḄyACN=1.2(Nik+N2k)+1.4Nik=1.2x(2.446+1,325)+1.4x2.137=7.518kNGGQMd=(pwYQM=(pYQ(0.05iiWklHi2)=0.6xl.4x(0.05x0.6x0.102xl.5x3.62)=0.05kN-mwwkwao=7o[N/((pA)+M/W]=lx[7518.015/(0.191x384)+49968.576/4120]=114.632N/mm2<[f]=205N/mmwd2fg⌕ijஹEᜋ"EᜋGH?;IJKLEᜋE?;ᡷEEᜋ#$%☢᜜3Eᜋ)(lo(mm)500ᔣNO(kN)Eᜋ,☢Eᜋ048x2.754

63******⚗89ᢧ;#$%<ᐰ>⚗?ᫀEᜋ,☢☢DA(mm2)384Eᜋ,☢1234i(mm)16cEᜋᢙAB(C[f](N/mm?)205EᜋᡷE?;ᡷᢙᢚ*ᦪ().9Ni=1.4x0x2xhx3xl=1.4x0.111x2x1.8x3x1.5=2.517kNwka)[\)=lo/i=5OO/16=31.25,nopr⊤A.0.6u,(p=0.915(Ni+N)/((pAc)=(2.517+3)xlO3/(O.915x384)=15.7O2N/mm2

64******⚗89ᢧ;#$%<ᐰ>⚗?ᫀ7[ft](N/mmz)Ñஹ₹GH§ᦪÒᥛ»½Òᥛ»½¨᫡᜜¼½Òᥛ¾Òᥛ?;¾ḄᚖÁ©¾ḄÔ©×ᔲ§¾Ô©(mm)Li(mm)L2(mm)1»Î115027501050ᔲ2ᥛ116027501050×ᵨᔜ᣸ᩚÛÜ᫡»₹ᔜ᣸ᩚÛÜ᫡»₹ᔜ᣸ᩚ¨᫡᜜¼½¨᫡¬¾᪗F'(kN)CF(kN)¾Ô©(mm)la(mm)13.777.52400300023.777.5212503000▬ß᝞:☢ß56

65******⚗89ᢧ;#$%<ᐰ>⚗?ᫀKஹὶ᫡"ὶ᫡ᩞᧇäὶ᫡ᔠå᪷ᦪni1ὶ᫡ᩞᧇpç10äὶ᫡,☢DA(cm2)14.3ὶ᫡,☢èឋ0I(cm4)245ὶ᫡,☢.ᢙ0W(cm3)49xxὶ᫡
᪗gk(kN/m)0.112ὶ᫡ᩞᧇᢙéB(C215[f](N/mmz)ὶ᫡ᩞᧇᢙêB(C125ὶ᫡ëឋìíE(N/mm2)2060002[T](N/mm~)ὶ᫡ìKÈLEî᫡₹᪗q-gk=O.112=0.112kN/m57

66******⚗89ᢧ;#$%<ᐰ>⚗?ᫀï1᣸F'i=Fi7m=3.77/l=3.77kNï2᣸F'=F27n)=3.77/l=3.77kN2F'=max[F'i,F'2]=3.77kN₹Cq=1.2xg=1.2x0.112=0.134kN/mkï1᣸Fi=Fi/m=7.52/l=7.52kNï2᣸:F2=F/ni=7.52/l=7.52kN2F=max[Fi,F]=7.52kN2ðß᝞7.52kN7,52kN7.52kN7,52kN7,S2kN7.52kN7.52kN0.134cN/m0.134cN/m0.134cN/m1ஹB("é0ß(kN-m)622Omax=yoMmax/W=1x4.038x10/49000=82.418N/mm<[f]=215N/mmñᔠ⌕ij2ஹᢙê"58

67******⚗89ᢧ;#$%<ᐰ>⚗?ᫀ5.1294.9283.9613.762.7932.592£■-2.592-2.793-3.76-3.%14928<5.129êß(kN)Tmax=YoQmax/(8I5)[bho2-(b-5)h2]=lx5.129xlOOOx[68xlOO2-(68-4.5)x84.82]/(8x245OOz00x4.5)=12.99N/mm2Tmax=12.99N/mm2<[T]=125N/mm2ñᔠ⌕ij3ஹᢰ("-2.455ß(mm)vax=2.455rnm<[v]=l/250=3000/250=12mmmañᔠ⌕ij4ஹÒùúûüýᵨþÿ᝱
1᣸Rimax=8.475kN2᣸R2max=8.475kN59

68******⚗ᢧᐰ"⚗#$%ᫀ᩽▲)*+᝱
:1᣸Rlmax=16.61kN2᣸R2max=16.61kN-ஹ/᫡12/᫡ᩞᧇ56$78/᫡ᔠ:᪷ᦪnz1/᫡ᩞᧇ=>16?$78/᫡@☢BAlen?)26.1/᫡@☢CឋEIx(cm4)1130/᫡@☢FᢙEW(cm3)141x/᫡HI᪗KLgk(kN/m)0.205/᫡ᩞᧇᢙMNOPQL215[f](N/mm2)/᫡ᩞᧇᢙRNOPQL125/᫡SឋTUE(N/mm2)206000[T](N/min)/᫡ᐕWᢰOM(mm)1/250₹Z᪗KLq'=gk=0.205=0.205kN/m1᣸F'1=mxR'i/n=1x8.475/1=8.475kNmaxz2᣸F'=nixR'/n=1X8.475/1=8.475kN22maxz₹ZPQLq=1.2xg=1.2x0.205=0.246kN/mk1᣸Fi=nixR/n=lxl6.61/l=16.61kNlmaxz2᣸:F=nixRax/n=1x16.61/1=16.61kN22mz16.61kN16.61kN0.246kN/m\[246kN/m0.246kN/mI(1)(2)ব42500116084060

69******⚗ᢧᐰ"⚗#$%ᫀ1ஹNO12ME\(kN-m)622Omax=yoMmax/W=1x3.168xlO/141000=22.467N/mm<[f]=215N/mm]ᔠ⌕_`2ஹᢙR121€16.7%10.55310.455__________________________|0.185*a——$61566342R*\(kN)Tax=yoQmax/(8I5)[bho2-(b-5)h2]=1X16.817X1000x[88xl602-(88-6)x140.22]/(8x11300mz000x6)=19.874N/mm222Tmax=19.874N/mm<[il=l25N/mm]ᔠ⌕_`3ஹᢰO1261

70******⚗ᢧᐰ"⚗#$%ᫀbc\(mm)vax=0.056mm<[v]=2xl/250=2x2000/250=16mmmx]ᔠ⌕_`4ஹdef*Q2PQLRi=-0.107kN,R=11.275kN,R=23.159kN23gஹ
ᥛᩚj12
ᥛᩚᩞᧇ56$78
ᥛᩚ@☢5616?$78
ᥛᩚ@☢BA(cn?)26.1
ᥛᩚ@☢CឋEKcm4)1130
ᥛᩚ@☢FᢙEW(cm3)141
ᥛᩚᩞᧇᢙkNOPQL205f(N/mm2)
ᥛᩚSឋTUE(N/mm2)206000
ᥛᩚj@☢lmnoi(cm)6.58pqrsᢙkNOPQL140ftw(N/mm^)
ᥛᩚjtOQ2p1=arctanL1/L=arctan(2750/1050)=69.102°2
ᥛᩚjde*Rxi=nR=1x23.159=23.159kNz3/᫡uᔣ*Nxzi=Rxi/tanPi=23.159/tan69.102°=8.842kN
ᥛᩚjuᔣ*62

71******⚗ᢧᐰ"⚗#$%ᫀNxi=Rxi/sinpi=23.159/sin69.102°=24.789kN
ᥛᩚjḄᨬᜧuᔣz*Nx=max[Ni...N]=24.789kNxxi
ᥛᩚ{OL0i=(L2+L2)0-5=(27502+10502)°-5=2943.637mm12
ᥛᩚ{|}3L<)i/i=2943.637/65.8=44.7368᪀PQ=GB50017-2003⊤C(pi=0.891cpᜧ0.6,(pi'=0.754u)kឋQ2oi=yNxi/((pi'A)=1X24789.172/(0.754x2610)=12.605N/mm2<^205N/mm20]ᔠ⌕_`pqrs12o=yoN/(lwt)=1x24.789x103/A=1x24.789x103/2610=9.498N/mm2

72******⚗ᢧᐰ"⚗#$%ᫀ6322yoMmax/
pbWx=1x3.168x10/
0.929x141x10=24.184N/mm<[f]=215N/mm]ᔠ⌕_`¢ஹ£¤¥¦§¨©qḄQ2/᫡¦ª«ᱥ©q%®ᙠ§¨°£¤±P²%U6£¤³᪝U6£¤³᪝µod(mm)20᫡/§¨·¸¹NOº»C30·¸¹¦³᪝⊤☢Ḅ¼W½N2.5£¤³᪝ᢙzNOPQL50O[rb](N/mm)[ft](N/mm2)`᪝64

73******⚗ᢧᐰ"⚗#$%ᫀt81ஹ᪝¡as`xyt£¤±£¤³᪝)*N/2=0.107/2=0.053kN³᪝£¤¾O:hNN/(4xnxdx[i])=0.107x103/(4x3.14x20x2.5)=0.17mmb᪝(to=yoN/(4x7xd2/4)=lx0.107xl03/(4x7x202/4)=0.085kN/mm2<0.85x[f¿]=42.5N/mm2tt]ᔠ⌕_`2ஹ¢£¤¥¦§t᝞©¢£¤Ḅ¥¦ᢴxy«f=0.95xf=0.95xl4.3=13.585N/mm2cccyoN/2=0.053kN<2x(b2-7rd2/4)xf=2x(lOO2-3.14x202/4)x13.585/1000=263.164kNccÀ£¨Á{bÂÃᢥÅ1ÆÇÈQ2Éᜐb=5d=5x20=100mm]ᔠ⌕_`65

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