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            [ͼ]纣ŴƷ̽      壺С 

      纣ŴƷ̽

      ߣ    Դվԭ    374    ʱ䣺2005-4-22
      ժҪҹݺϿˮȴ󣬲Ѷܴ󣬿纣һּ㡢ʵú;õĽ纣Ǹŵһʽµص㡣ĶĽṹص㡢㡢ʩ;̽֡
      ؼʣ   ֹ   ϸֹ
       
      һŴص
      纣ҪǲôţһôļװгŴôĸԭںУʵǶڴ䣬ֻáʹõĴͬںдҪڵά޺ͷ;ԣԼپά޵鷳߾Ч档ŴĴص㣬һгĳãǺλͷµȶǿȺͰȫɿԣļ;úԣ;Ժά޷ķ㡣 

      
      1
      øĴտռʹҪ󣬿ݡüӾܣͬڴʽص㡣ƽǳȺͿȶܴĳΣ150m40mгͷʩҪӸȶԣٸӺ졣гȴ󣬿ɱ⽻ͨ¹ʵгӴ󴬿ȶԡΣбϱ÷ʩ˵ЧϺá߶4.5mˮ2.2 
      m

      2ṹ
      ΪƽΣ޴ȶԺܺã㡣ϰ벿װ30cmȵĸֽŰ棬˲ݡӾ֧кأɢ壬ʹ״ֲ䡣°벿ְ(=12mm)T(T=200x10x12mm)Ӿ͸ֲõͺϽĴøְ壬нǿķְԤ͸ʴĺȡӾܵҸʹϣγɸϸֹŵ˫ṹӾܲøֹҸ(&Oslash;200x6mm)͸(&Oslash;160x6mm)𵽴ǵáӾҸ˲øϸֹŰʽṹնȺܴ󣬼ӹӼ㣬˿ɲø˿ˮɰЧܳͷ˵ãͺ䡢ŤνϴӡӾҸڼԤӦֽ(7&Oslash;j15.24)γԤӦϸֹܵĴ壬ݡĿ䡢ŤնȼӴ󡣸Ϊ5ܱո֣ԱӦպ;ֲޣ֤ȶͰȫ
      3
      泵2%˫£ʱųˮ10cm·棬гͱֽ塣гֽŷײǿײӺΪ80ף߶Ϊ1.60m𵽷˺ͱгȫáڻײ5m㹻ĺйˮףųˮͷĲˡбϽøֽ԰׶̨(ֱ50cm͸60cm)ˣ˵ƻêλڳλӰ죬êҪԶڡڴ֧ܰװ֣êƶӵأصɵêȡêֺ͵زøֽ۾ú໥ᣬý𽺼ӣӦĸҪϿǵά޵Ŀԣʺѹͼϵӣװù򵥡ȫɿúװ㡣ñ׼͸죬Ա֤гʡ
      4
      ;ܹؼΪǿְķ溸ê̸ֽ8cmȵĸֽ͸˿ţˮɰĨ⣬γɸϸְŽṹǿְĿθնȣʹְȾúڿ䣬ڱڸֲĸʴأɲûɲøֽ͸˿ţȫʵָĳЧ˿ˮɰķܺãˮബĳɹӦüǸʴļʵôʩ
      ص
      1  
      صǸã帡ΪȺأĺ򲻻Ƥͧؼʵ˵ĲͲˮλ仯ĸΪǾأ仯˵Ĳ塢ȺͲСֳ˵ĴС˴Ĳ

      ļ㷽o=10.8(ho)*0..8           
       ݺϿ˸ho=3.30m
      o=10.8x(3.30)* 0..8=28.07m
      ˵ƻܴһֺǺնȣƽڡصáŴĳͿȶڲ˵ĲȶԺܺãɰ˵Ĳ˶ԴӰ
      1  
      ڳлµĴݡӾԷɢʹݼлأնӦ㼯лر仯ҪȫܽϾȺʱر帡ƽ⣬СֲȳܽϼкʱӦð峤150mΪһǣĳضԴӰ󡣻صļ벨ԭƣسȳʱ໥õʧȥƽ⣬ıӰ췴Сڰϲóأ̶֧мأǻغƫӰӴ
      2  
          
      ݺϿ̨Ӱأ˲128ȫ6ʱ䣬10ȫ2ʱ䡣̨ƻܴصȻֺ޷ܣֻܷܡ̨絽ʱҪսͨԸŵӰ죬׮êλƽȶêܳλ仯Ӱ죬ڴת򶨻ֺ͵ܹԶĸ߶Ϊ4.5m߶ȴ3.3mǽʽ߶ȼӸΪ1.6mΪ˷ˣҲΪ˱֤гľ԰ȫ
      ġǿ
      1  
       
          ˶ԸֻǾֲĲ帡ӴΪƽȶȸСֵΪ㡣

      ȸΪΣ򻯳ɾ̶֧ͬصĵЧء
                qE=4q/5=4x1.65x10/5=13.2kn/m
                Mmax=b qEl&sup2;/24=39.6x13.2x14.035&sup2;/24=4290.25 kn-m
               M=- b qEl&sup2;/24=-39.6x13.2x14.035&sup2;/12=- 8580.50 kn-m 
               R= b qEl/2=39.6x13.2x14.035/2= 889.257 kn 
      ٴְ尴ŵĵģΪŽ棬n=20/3=6.67
      ӦI=79.3031m&sup2;*&sup2;    W=45.3161m&sup3;    W=31.7212m&sup3;
      أ=-M/W=-4290.25/45.3161= -0.10mpa < []=17.5 mpa
      =M/W=4290.25/31.7212=0.14mpa<[]=180mpa
      أ= -M/W=-8580.50/31.7212=-0.27mpa < []=17.5 mpa
      =M/W=8580.50/45.3161=0.19mpa<[]=180mpa
      ڵƬӾֹ(&Oslash;200x6mm)
      أN = Mmax/H=4290.25/6x3.78=189.16 kn
      = -N/A=-189.16/0.09= -2.1 mpa < []=17.5 mpa
      = N/A=189.16/0.0107=17.7 mpa<[]=180mpa
      أN = M/H=8580.50/6x3.78=378.33 kn
      = N/A=378.33/0.00362=104.5 mpa<[]= 180mpa
      N= -378.33 kn
      ֹ(&Oslash;200x6mm)ǿN0= As fs+ Ac fc+ Ac f&#312;s 
      t/R=19.4x3.142x0.6x315+0.7854x18.8&sup2;x19.5+0.7854x18.8&sup2;x315x0.6/9.4=2251.34 
      kn
      ֲǿN1=(1/1.25) x 70.8x340=1925.8 kn
      ֽǿN2=(1/1.25)x (30x55-0.7854x20&sup2;)x23=245.8 kn
      ϸֹǿ[N]= N0+ N1+ N2=2251.34+1925.8+245.8=4422.94 kn> N= -378.33 kn
       
      Ĳˮѹ
      ·̣˳򴬲б߶ȣ˵Ϯ߶ȡ˸С1.50ʱ˵Ϯ߶ȼ㹫ʽ
      h m =3.2 K h0 tg    б´ֲڳ̶ϵK=0.45     ȫh 0       б½ǶȦ
      h m =3.2x0.45x3.3x0.67=3.18m     
      ˵Ϯ߶ȵڻ߶ȣǲõĹʽʺϣʵ˸ߴ1.50ףһоʲ˵Ϯ߶ȿܴﵽ߶ȣȡ߶Ϊ˵Ϯ߶ȣԴˮѹԴӰ죬ȡʵķ˴ʩ
      q=3.50x3.6 x 10=126 kn/m
      ڸȶ
      ڲ˵Ĳo=28.07m<b=42.6mԿȴĸֲӰ졣·̣źͻԲ赲ã˵Ϯʹ沿ֱͣˮѹӰ촬ȶԵĸǣغ͸ܴ󣬿ȴĸȶԺãq=126 
      kn/mСԸȶӰС
      2
      ˲1210٣8϶ࡣ˸3.3׺8׼ƣ8ϴսͨ˵ĺˮгʱռ˿ױգˮӰ첻ʹûײ㹻йˮųˮķˮӭ㡣
      ѹW0=1300pa       K1=1.0      K2=1.0       K3=1.0       K4=1.3
      ѹW= K1 K2 K3 K4W0=1.0x1.0x1.0x1.3x1300=1690 pa
      Q=3.6xW=3.6x1690=6084 pa / m
      ҪêH=150x6084=912.6 kn
      50׼êĺH=912.6/3= 304.2kn
      êF=304.2/Sin45&ordm;=430.2kn
      G= H= 304.2kn 
      3
      ڰϲóأ̶֧мأǻغƫĵӰʹӴƽҳ120ĺطֲΪУӰնȷɢʹݵ塣
       
      гƫϵ=1.2551
       
      ȫȳ75׼أ³󡣺гؼ㣬ƽҳкɢгءƽҳкػΪ֧صЧأ
      гqE=3P/2* l=3x120/(2x75)=2.4kn/m
      гMmax=b qEl&sup2;/24=1.2551x4x2.4x75&sup2;/24=2824 kn-m
               M=-b qEl&sup2;/24=-1.2551x4x2.4x75&sup2;/12=-5648 kn-m 
               R= b qEl/2=4x2.4 x 75/2= 360 kn 
      òСڲ˶ԸӰ졣
      塢ֲ
      1  
      һˮh=2.2 mѹq=22kn/m&sup2;
      ˸ߵĳˮh=2.2+3.3=5.5mѹq=55kn/m&sup2;
      Ƿĳˮh=2.2+2+1.6=5.8mѹq=58kn/m&sup2;
      Ӿ(T200x100x12mm)߶H=20cml=50cmӾ֧мL=150cm
      ͼӾߺȦ=12ף򻯿ǲƸϸֽŲãʵҪܴá
      Ӿ߰㣺
       ˸ߵĳˮMmax= ql&sup2;/24=20x1.50&sup2;/24=1.875 kn-m
                             M=-ql&sup2;/24=-20x1.50&sup2;/12=-3.75 kn-m 
                           R=ql/2=20 x1.50/2=15 kn 
       ˸ߵĳˮMmax= ql&sup2;/24=58x1.50&sup2;/24=5.438 kn-m
                                M=-ql&sup2;/24=-58x1.50&sup2;/12=-10.875 kn-m 
                              R=ql/2=58 x1.50/2=43.5 kn 
          Ӿ߰Ϊ԰壬Ҫã򻯼δӿǡ
      ζӦI= 0.00010889 m&sup2;*&sup2;    
      W=0.0000693m&sup3;    W=0.0002420m&sup3;
      أ=M/W=5.438/0.0000693=78.5mpa<[]=180mpa
      =-M/W=-5.438/0.000242= -22.5mpa < []=180 mpa
      أ=M/W=10.875/0.000242=44.9mpa>[]=180mpa
      = -M/W=-10.875/0.0000693=-156.9mpa < []=180 mpa
      = R/bh=43.5/0.20x0.024=43.5/0.0048=9.1mpa<[]=120mpa
      2  Ӿ       ֹ(&Oslash;200x6mm)    A=55x30 cm
      ӾܼL=600cmӾ߼l=50cm
      أ ˸ߵĳˮR=30 kn 
       ˸ߵĳˮR=87 kn
      㣺
       ˸Mmax=[(n&sup2;+2)/24n ]Pl =[(3&sup2;+2)/24x3 ]x30x6==27.5 kn-m
                   M=-[(2n&sup2;+1)/24n ]Pl =[(2x3&sup2;+1)/24x3 ]x30x6=-47.5 kn-m 
                   R= (n/2) P =(3/2)x30=49.50 kn 
       ˸Mmax=[(n&sup2;+2)/24n ]Pl =[(3&sup2;+2)/24x3 ]x87x6=79.75 kn-m
                       M=-[(2n&sup2;+1)/24n ]Pl =[(2x3&sup2;+1)/24x3 ]x87x6=-137.75 kn-m 
                      R= (n/2) P =(3/2)x87=130.5 kn 
      ֽż㣺
      X=RgAg/Rab=340x36.2/23x30=17.8cm
             
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x17.8x(40C17.8/2)+ 
      (1/1.25) x340x36x(40C8.6)= 613.045 kn-m > Mj=79.75 kn-m
        ֧X=RgAg/Rab=340x48/23x30=17.8cm
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x17.8x(46.4C17.8/2)+ 
      (1/1.25) x340x36.2x(46.4C15)=677.64 kn-m > Mj=-137.75 kn-m
      Q=0.051&macr;R bh0=0.051&macr;40x30x46.4=449 kn > R= 130.5knҪ
      Q=0.038Rl bh0=0.038x2.15x30x46.8=115kn < R= 130.5knӦǿ
      3ݼӾ
      ݼӾҸ֧дӾߣΪҸҪõҪ
      ӾҸ˺֧мL=450cm
      أ ˸ߵĳˮR=99 kn 
       ˸ߵĳˮR=261 kn
      㣺
       ˸Mmax=[(n&sup2;-1)/(24n) ]Pl =[(2&sup2;-1)/(24x2) ]x99 x4.5=27.844 kn-m
                   M=-[(2n&sup2;+1)/(24n) ]Pl =[(2x2&sup2;+1)/(24x2) ]x99 x4.5=-83.531 
      kn-m 
                   R= (n/2) P =(2/2)x99=99 kn 
       ˸Mmax=[(n&sup2;-1)/(24n) ]Pl =[(2&sup2;-1)/(24x2) ]x261x4.5=73.41 kn-m
                       M=-[(2n&sup2;+1)/(24n) ]Pl =[(2x2&sup2;+1)/(24x2) ]x261x4.5=-220.22 
      kn-m 
                      R= (n/2) P =(2/2)x261=261 kn 
          X=RgAg/Rab=340x36.2/23x30=17.8cm    ֹ(&Oslash;200x6mm)   A=80x30 cm
             
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=[(1/1.25)x23x30x17.8x(65C17.8/2)+ 
      (1/1.25) x340x36x(65C8.6)]/1000=1103.49 kn-m > Mj=73.41 kn-m
        ֧X=RgAg/Rab=340x36/23x30=17.7cm
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x17.7x(80C17.7/2)+ 
      (1/1.25) x340x36.2x(80C15)= 1335.18 kn-m > Mj=-220.22 kn-m
      Q=0.051&macr;R bh0=0.051&macr;40x30x66.4=642.5 kn > R= 261knҪ
      Q=0.038Rl bh0=0.038x2.15x30x66.4=162.7kn > R= 261knֽб濹
      3  ֽ
          ݼӾҸΪֽ壬ΪṹҸҪõҪ
       
          ֽ30cmź10cmq=1x0.4x25=10 kn/m
      Mmax= ql&sup2;/24=10x4.50&sup2;/24=8.438 kn-m
                    M=-ql&sup2;/12=-10x4.50&sup2;/12=-16.875 kn-m 
                   R=ql/2=10 x4.50/2=22.5 kn 
       
      ֽ尴忼ǣԹҳ--120гȷ
      a=a1+d+L/3=0.8+2.70+4.50/3=5m
      ÿװP=2x300/5=120kn
      p=120/2=60 kn
      Mmax=[(n&sup2;-1)/24n ] pl =[(2&sup2;-1)/24x2 ]x60 x4.5=16.875 kn-m
                        M=-[(2n&sup2;+1)/24n ] pl =[(2x2&sup2;+1)/24x2 ]x60 x4.5=-50.625 
      kn-m 
                       R= (n/2) p =(2/2)x60=60 kn 
       
         Mmax=1.2x8.438+1.1x16.875=28.688 kn-m
                M=-(1.2x16.875+1.1x50.625)=-75.938 kn-m 
                R= 1.2x22.5+1.1x60 = 93kn 
             X=RgAg/Rab=340x25.4/23x100=3.8cm           (AgC10&Oslash;18)
             
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x100x3.8x(26.2C3.8/2)+ 
      (1/1.25) x340x15.3x (26.2C3.9)=262.709 kn-m > Mj=28.688 kn-m
         ֧X=RgAg/Rab=340x25.1/23x100=3.7cm           (AgC10&Oslash;18)
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x100x3.8x(26.2C3.8/2)+ 
      (1/1.25) x340x15.3x (26.2C3.9)=262.709kn-m > Mj=-75.938 kn-m
      Q=0.051&macr;R bh0=0.051&macr;40x100x26.2=845.09 kn > R= 93knҪ
      Q=0.038Rl bh0=0.038x2.15x100x26.2=214.1kn > Rj= 93knб濹㣬ֽ
       бֽŰ
          бϲ˵Ϯˮѹ߶ȣԴˮѹԸֽŰӰ졣
      q=0.6 x 25=15 kn/mˮѹq=3.6 x 10=36 kn/mܺq=15+36=51 kn/m
      Mmax= ql&sup2;/24=51x4.50&sup2;/24=43.03 kn-m< M=262.103 kn-m 
                    M=-ql&sup2;/12=-51x4.50&sup2;/12=-86.06 kn-m< M=-262.103kn-m 
                   R=ql/2=51 x4.50/2=114.75 kn< R=214.1kn
       С壬ͬ
      4  Ӿ
      һ㴬صǺѹ󣬲ÿܵļӾʽŴΪƽΣʺϲüӾʽӾܵϡҸˣҪ㳵ˮѹõҪ
      Ҹ       ֹ(&Oslash;200x6mm)        A=55x30 cm
      ӾܼL=450cmq=2x93/1=186 kn/m
      Mmax= ql&sup2;/24=186x3&sup2;/24=69.75 kn-m
                    M=-ql&sup2;/12=-186x3&sup2;/12=-139.5 kn-m 
                   R=ql/2=186 x3/2=279 kn 
        X=RgAg/Rab=340x36.2/23x30=17.8cm   
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x17.8x(40C17.8/2)+ 
      (1/1.25)x340x29.5x(40C6)=578.4kn-m>Mj=69.75 kn-m
       ֧X=RgAg/Rab=340x24.5/23x30=12cm      (AgC5&Oslash;25) 
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x12x(49C12/2)+ 
      (1/1.25) x340x36.2x(49C15)= 619.61 kn-m > Mj=-139.5 kn-m
      Q=0.051&macr;R bh0=0.051&macr;40x30x49=474.2 kn > R=279knҪ
      Q=0.038Rl bh0=0.038x2.15x30x49=120.1kn< R=279knֽб濹
      Ҹ         ֹ(&Oslash;200x6mm)        A=55x30 cm
      ӾܼL=450cmأ ˸ߵĳˮR=30 kn 
       ˸ߵĳˮR=87 kn
      㣺
       ˸Mmax=[(n&sup2;+2)/24n ]Pl =[(5&sup2;+2)/(24x5) ]x30x3==20.25 kn-m
                   M=-[(2n&sup2;+1)/24n ]Pl =[(2x5&sup2;+1)/(24x5) ]x30x3=-38.25 kn-m 
                   R= (n/2) P =(5/2)x30=70 kn 
       ˸Mmax=[(n&sup2;+2)/24n ]Pl =[(5&sup2;+2)/(24x5) ]x87x3=58.73 kn-m
                       M=-[(2n&sup2;+1)/24n ]Pl =[(2x5&sup2;+1)/(24x5) ]x87x3=-110.93 kn-m 

                      R= (n/2) P =(5/2)x87=217.5 kn 
      X=RgAg/Rab=340x36.2/23x30=17.8cm
             
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x17.8x(40C17.8/2)+ 
      (1/1.25) x340x36x(40C8.6)= 613.045 kn-m > Mj=58.73 kn-m
        ֧X=RgAg/Rab=340x48/23x30=17.8cm    
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x17.8x(46.4C17.8/2)+ 
      (1/1.25) x340x36.2x(46.4C15)=677.64 kn-m > Mj=-110.93 kn-m
      Q=0.051&macr;R bh0=0.051&macr;40x30x46.4=449 kn > R= 217.5knҪ
      Q=0.038Rl bh0=0.038x2.15x30x46.8=115kn < R= 217.5knӾֽá  
              Ҹ˸ֹ(&Oslash;200x6mm)        A=50x30 cm
      q=2 x114.75=229.5 kn/ m
      Mmax= ql&sup2;/24=229.5x3.50&sup2;/24=117.14 kn-m
                    M=-ql&sup2;/12=-229.5x3.50&sup2;/12=-234.28 kn-m 
                   R=ql/2=229.5x3.50/2=401.6 kn 
         X=RgAg/Rab=340x36.2/23x30=17.8cm   
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x17.8x(35C17.8/2)+ 
      (1/1.25)x340x24.5x(35C6)=449.7kn-m>Mj=117.14 kn-m
         ֧X=RgAg/Rab=340x24.5/23x30=12cm      (AgC5&Oslash;25)
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x12x(46C12/2)+ 
      (1/1.25) x340x36.2x(46C15)= 570.2 kn-m > Mj=-234.28 kn-m
      Q=0.051&macr;R bh0=0.051&macr;40x30x46=445.1 kn > R=401.6knҪ
      Q=0.038Rl bh0=0.038x2.15x30x46=112.7kn< R=401.6knֽб濹
       êغ
      ĿêƽP=304.2 kn
      ӾM=-PL=-304.2x3.50=1064.7 kn-m
                          Q=304.2 kn
      Ӿܶ˲غͼܴ󣬺ʺϲ30cmȵʵ
      X=(RgAg-R&acute;gA&acute;g)/Rab=(340x48.3 C340x36)/23x30=6cm  (AgC6&Oslash;32  A=420x30cm)
      M=(1/c)RabX(h0CX/2)+(1/s)R&acute;gA&acute;g(h0Ca&acute;g)=(1/1.25)x23x30x6x(414C6/2)+(1/1.25) 
      x340x36x(414C6)=5356.4 kn-m > Mj=1064.7 kn-m
      Q=0.051&macr;R bh0=0.051&macr;40x30x414=4006 kn> Qj=304.2 knҪ
      Q=0.038Rl bh0=0.038x2.15x30x414=1015kn> Qj=304.2 knб濹㡣
      5  Ӿܸ
       Ӿܸ
      Ӿܸ˵ãҪǴͳѹɢ塣
      Ӿܽڵ㼯漰P=99.75x2x3=598.5kn
      ҸP=0.40&sup2;x3x25=12kn
                          P=598.55+12=610.5kn
      ѹN=P/2 COS=610.5/(2x0.8201)=375.211kn
      ֹ(&Oslash;160x6mm)ǿN0= As fs+ Ac fc+ Ac f&#312;s 
      t/R=15.4x3.142x0.6x315+0.7854x14.8&sup2;x19.5+0.7854x14.8&sup2;x315x0.6/7.4=1689.24 
      kn
      ȶϵ1=1-0.115&macr;(l0/D-4)= 1-0.115&macr;(345/16-4)=0.581
      ѹȶǿ[N]=1 N0=0.518x1689.24=875.03 kn>Nj=375.211kn
       Ӿܸ         ֹ(&Oslash;160x6mm)       
      ˺õļQ=889.257/6=148.262 kn
      Ƭܸ˵N=P/ COS=148.262/0.9055=163.742kn
      Ӿܸ˵ãҲǴͳѹɢ塣
      Ӿܽڵ㼯漰P=99.75x2x3=598.5kn
      ҸP=0.40&sup2;x3x25=12kn
                          P=598.55+12=610.5kn
      ѹN=P/2 COS=610.5/(2x0.9055)=337.107kn   
      ͬŸֹ(&Oslash;160x6mm)ѹȶǿ[N]=875.03 kn> Nj=337.107kn  
      
      1  480m&sup3;ţC20  180 m&sup3;C30  324 m&sup3;C40  4225 m&sup3;ϼ4729 m&sup3;13023֡
      2  ֲģְ733ֹ֣281֣͸405ֽ֣546֣ԤӦֽ14֣Ӻê̸ּ21֣2000֡
      ߡ
          
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