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1、三跨连续梁的分析三跨连续梁的分析fini/clear/title,three span continous bridge/prep7!上顶板的关键点位置k,1,0,0k,2,-2.1k,3,-2.6,-0.125k,4,-2.8,-0.125k,5,-3.0,-0.125k,6,-3.4857,-0.1036k,7,-3.9714,-0.0821k,8,-4.4571,-0.0607k,9,-4.9429,-0.0393k,10,-5.4286,-0.0179k,11,-5.9143,0.0036k,12,-6.4,0.025!下底板的关键点位置k,13,-2.8,-1.85k,14,-1.8
2、5!上顶板关键点 49m 位置kgen,9,1,12,1,0,0,49/8,100!上顶板关键点 50m 位置kgen,2,1,12,1,0,0,50,900!上顶板关键点 50+34.5m 位置kgen,9,901,912,1,0,0,34.5/8,100!上顶板关键点 50+35m 位置!kgen,2,901,912,1,0,0,50,900!板的高度由 1.85m 变至 3.875mc1=0.000843399 !49m 边跨的二次抛物线系数c2=0.001701323 !34.5m 边跨的二次抛物线系数*dim,x1,array,8 !定义边跨的八分点位置*do,i,1,8,1x1(i
3、)=i*49/8*enddo*dim,x2,array,8 !定义中跨的八分点位置*do,i,1,8,1x2(i)=i*34.5/8*enddo!下底板边跨（49m）八分点关键点的 y 坐标位置*dim,yb,array,8 *do,i,1,8,1yb(i)=c1*x1(i)*2*enddo!下底板中跨（34.5m）八分点关键点的 y 坐标位置*dim,ym,array,8 *do,i,1,8,1ym(i)=-c2*(x2(i)-34.5)*2+2.025*enddo!生成下底边跨（50m）八分点的关键点*do,i,1,8,1kgen,2,13,14,1,0,-yb(i),x1(i),i*10
4、0*enddo!下底板 50m 处关键点kgen,2,813,814,1,0,0,1,100!生成下底中跨（5034.5m）八分点的关键点*do,i,1,8,1kgen,2,913,914,1,0,ym(i),x2(i),i*100*enddo!边墩处的横隔板位置!1，2，3，414 为 0m 处横隔板位置的所有关键点!51，52，5354 为-0.5m 处横隔板位置的所有关键点kgen,2,1,14,1,0,-0.5,50!中墩处的横隔板位置!801，802，803，804814 为 49m 处横隔板位置的所有关键点!901，902，903904 为 50m 处横隔板位置的所有关键点!连成板
5、面!上顶板，板厚 0.25met,1,shell63mp,dens,1,2500mp,ex,1,3.5e10mp,prxy,1,0.1667r,1,0.25*do,i,0,16,1a,1+i*100,1+(i+1)*100,2+(i+1)*100,2+i*100*enddoa,1,51,52,2aatt,1,1,1asel,none!上顶板的加腋，板厚 0.375mr,2,0.375*do,i,0,16,1a,2+i*100,2+(i+1)*100,3+(i+1)*100,3+i*100*enddoa,2,52,53,3aatt,1,2,1asel,none!肋板与翼缘交接处，板厚 0.5mr
6、,3,0.5*do,i,0,16,1a,3+i*100,3+(i+1)*100,4+(i+1)*100,4+i*100a,4+i*100,4+(i+1)*100,5+(i+1)*100,5+i*100 *enddoa,3,53,54,4a,4,54,55,5aatt,1,3,1asel,none!翼缘厚度渐变，下面定义翼缘板的渐变厚度*dim,hd,array,9hd(9)=0.2hd(8)=1*(3.4/7)*0.3/3.4+0.2hd(7)=2*(3.4/7)*0.3/3.4+0.2hd(6)=3*(3.4/7)*0.3/3.4+0.2hd(5)=4*(3.4/7)*0.3/3.4+0.2
7、hd(4)=5*(3.4/7)*0.3/3.4+0.2hd(3)=6*(3.4/7)*0.3/3.4+0.2hd(2)=7*(3.4/7)*0.3/3.4+0.2hd(1)=0.5*do,i,1,8,1r,30+i,hd(i),hd(i),hd(i+1),hd(i+1) !定义渐变的翼缘厚度*enddo*do,i,0,16,1*do,k,5,11,1a,k+i*100,k+(i+1)*100,k+1+(i+1)*100,k+1+i*100a,k,k+50,k+1+50,k+1aatt,1,k+26,1asel,none *enddo*enddoasel,none!肋板厚度 0.5mr,4,0.
8、5*do,i,0,16,1a,4+i*100,4+(i+1)*100,13+(i+1)*100,13+i*100*enddoa,4,54,63,13aatt,1,4,1asel,none!下底板厚度 0.25m0.4m 按 2 次抛物线过度c3=6.2474e-05 !边跨底板厚度变化的二次抛物线系数c4=0.000126024 !中跨底板厚度变化的二次抛物线系数*dim,h1,array,8 !边跨底板厚度*do,i,1,8,1h1(i)=0.25+c3*x1(i)*2*enddo*dim,h2,array,9 !中跨底板厚度*do,i,1,8,1h2(i)=0.25+c4*x2(i)*2*
9、enddoh2(9)=0.4!生成边跨的底板单元*do,i,1,8,1r,10+i,h1(i)a,13+(i-1)*100,13+i*100,14+i*100,14+(i-1)*100aatt,1,10+i,1asel,none*enddo!生成中跨的底板单元*do,i,1,9,1r,20+i,h2(i)a,13+(i+7)*100,13+(i+8)*100,14+(i+8)*100,14+(i+7)*100aatt,1,20+i,1asel,none*enddoa,13,63,64,14aatt,1,20+i,1asel,noner,50,2 !横隔板厚度 2ma,1,51,64,14 !端
10、横隔板a,801,901,914,814aatt,1,50,1allselesize,0.4mshape,0mshkey,1amesh,allnsel,allnsym,x,10000,allesym,x,10000,alllocal,11,0,84.5csys,11allselnsym,z,100000,allesym,z,100000,allallselnummrg,allnumcmp,allcsys,0!施加支座约束!支座位置选择在肋板处（端部支座）nsel,s,loc,y,-1.85nsel,r,loc,x,-3,-2.6nsel,r,loc,z,-0.5,0d,all,ux,uy,ro
11、ty,rotzallselnsel,s,loc,y,-1.85nsel,r,loc,x,3,2.6nsel,r,loc,z,-0.5,0d,all,ux,uy,roty,rotzallselnsel,s,loc,y,-1.85nsel,r,loc,x,-3,-2.6nsel,r,loc,z,169,169.5d,all,ux,uy,roty,rotzallselnsel,s,loc,y,-1.85nsel,r,loc,x,3,2.6nsel,r,loc,z,169,169.5d,all,ux,uy,roty,rotz!中部支座allselnsel,s,loc,y,-3.875nsel,r,lo
12、c,x,3,2.6nsel,r,loc,z,49,50d,all,ux,uy,roty,rotzallselnsel,s,loc,y,-3.875nsel,r,loc,x,-3,-2.6nsel,r,loc,z,49,50d,all,ux,uy,roty,rotzallselnsel,s,loc,y,-3.875nsel,r,loc,x,-3,-2.6nsel,r,loc,z,119,120d,all,ux,uy,uz,roty,rotzallselnsel,s,loc,y,-3.875nsel,r,loc,x,3,2.6nsel,r,loc,z,119,120d,all,ux,uy,uz,roty,rotz!工况 1 一期恒载allsel/soluacel,9.8solvefini/post1plnsol,s,1nsel,s,loc,z,10esln,s,allplnsol,s,1
