中承式拱桥Ansys模型.doc

上承式、中承式和下承式拱桥的分类，主要是按照拱桥的行车道位置分的。行车道系（桥面系）在拱肋之上的称为上承式，中承式拱桥的行车道系位于拱肋矢高的中间部位，桥面系一部分用吊杆悬挂在拱肋下，一部分用立柱支撑在拱肋上。同理，下承式拱桥的车行道位于拱肋和吊杆之下。以下是Ansys模型命令流/prep7 et,1,beam4 et,2,link10 et,3,shell63 r,1,6,4.5,2,2,3 r,2,3,3.0,0.8,1.5,3 r,3,0.4,0.4,0.4,0.4r,4,0.0157,9e-4r,5,0.0157,1.4e-3r,6,1.0,0.2,0.1,1,1.5mp,ex,1,2e11 mp,nuxy,1,0.3 mp,dens,1,7800 mp,ex,2,3e10 mp,nuxy,2,0.2 mp,dens,2,2700 !添加关键点k,1,-65,-5.25k,2,-60,-10,0 k,3,-55,-5.25k,4,-50 k,5,-45,4.75k,6,-40,9k,7,-35, 12.75k,8,-30,16k,9,-25, 18.75k,10,-20, 21k,11,-15,22.75k,12,-10,24k,13,-5,24.75k,14,0,25k,15,5,24.75k,16,10,24k,17,15,22.75k,18,20,21k,19,25, 18.75k,20,30,16k,21,35,12.75k,22,40,9k,23,45,4.75k,24,50 k,25,55,-5.25k,26,60,-10 k,27,65,-5.25*do,i,1,29 k,27+i,5*i-75*enddokgen,2,all,21,0 !绘拱圈框架r1*do,i,1,26l,i,i+1 l,i+56,i+57 *enddol,1,28 l,27,56 l,57,84l,83,112 !绘制拱间联系r2*do,i,1,13 l,2*i,2*i+56 *enddo!绘制横隔梁r5*do,i,1,29l,i+27,i+83*enddo!绘制纵梁r5*do,i,1,28l,i+27,i+28l,i+83,i+84*enddo!绘腹拱墩r5*do,i,1,3 l,i+56,i+84 l,i,i+28l,i+24,i+52l,i+80,i+108 *enddo!绘桥梁吊杆r4r5*do,i,1,19 l,i+4,i+32l,i+60,i+88*enddo!绘桥面r3*do,i,1,28a,i+27,i+28,i+84,i+83*enddo!拱圈框架r1 lsel,s,1,56 latt,1,1,1 lesize,all,2 lmesh,all !横隔梁纵梁腹拱墩r6lsel,s,70,166latt,1,6,1 lesize,all,2 lmesh,all !拱间联系r2lsel,s,59,67lsel,a,57,57lsel,a,69,69latt,1,2,1 lesize,all,2 lmesh,all !悬索 lsel,s,167,172latt,1,5,2 lesize,all,1 lmesh,all lsel,s,173,198latt,1,4,2 lesize,all,1 lmesh,all lsel,s,199,204latt,1,5,2 lesize,all,1 lmesh,all !桥面aatt,2,3,3 aesize,all,2 amesh,all finish!施加荷载和约束/solu!位移约束dk,2,alldk,26,alldk,58,alldk,82,alldk,28, , , , 1,uy,uzdk,56, , , , 1,uy,uzdk,84, , , , 1,uy,uzdk,112, , , , 1,uy,uz!重力G acel,0,9.8,0, pstres,1/solu antype,2modopt,lanb,20 mxpand,10,0,100pstres,1 solve/post1set,listset,1,2 !设置荷载子步（第二阶）的结果为当前pldisp,1 !绘制振型图plnsol,u,y !绘制Uy图etable,mi,smisc,6 !定义单元表（弯矩分布）etable,mj,smisc,12plls,mi,mj !绘制弯矩分布 /POST1ETABLE,Mz1,SMISC,