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1、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/prep7et,1,beam4et,2,link10et,3,shell63r,1,6,4.5,2,2,3r,2,3,3.0,0.8,1.5,3r,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
2、,2e11mp,nuxy,1,0.3mp,dens,1,7800mp,ex,2,3e10mp,nuxy,2,0.2mp,dens,2,2700!添加关键点k,1,-65,-5.25k,2,-60,-10,0k,3,-55,-5.25k,4,-50k,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,19,25,1
3、8.75k,20,30,16k,21,35,12.75k,22,40,9k,23,45,4.75k,24,50k,25,55,-5.25k,26,60,-10k,27,65,-5.25*do,i,1,29k,27+i,5*i-75*enddokgen,2,all,,,,,21,,0!绘拱圈框架r1*do,i,1,26l,i,i+1l,i+56,i+57*enddol,1,28l,27,56l,57,84l,83,112!绘制拱间联系r2*do,i,1,13l,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*d
4、o,i,1,28l,i+27,i+28l,i+83,i+84*enddo!绘腹拱墩r5*do,i,1,3l,i+56,i+84l,i,i+28l,i+24,i+52l,i+80,i+108*enddo!绘桥梁吊杆r4r5*do,i,1,19l,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r1lsel,s,,,1,56latt,1,1,1lesize,all,2lmesh,all!横隔梁纵梁腹拱墩r6lsel,s,,,70,166latt,1,6,1lesize,all,2lme
5、sh,all!拱间联系r2lsel,s,,,59,67lsel,a,,,57,57lsel,a,,,69,69latt,1,2,1lesize,all,2lmesh,all!悬索lsel,s,,,167,172latt,1,5,2lesize,all,,,1lmesh,alllsel,s,,,173,198latt,1,4,2lesize,all,,,1lmesh,alllsel,s,,,199,204latt,1,5,2lesize,all,,,1lmesh,all!桥面aatt,2,3,3aesize,all,2amesh,allfinish!施加荷载和约束/solu!位移
6、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Gacel,0,9.8,0,pstres,1/soluantype,2modopt,lanb,20mxpand,10,0,100pstres,1solve/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,sm
7、isc,12plls,mi,mj!绘制弯矩分布/POST1ETABLE,Mz1,SMISC,6ETABLE,Mz2,SMISC,12/REPLO/VIEW,1,-1/ANG,1/REP,FAST!*设置视角PLDI,,ANMODE,10,0.5,,0!*建立动画
