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。 /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,3,0.4,0.4,0.4,0.4 r,4,0.0157,9e-4 r,5,0.0157,1.4e-3 r,6,1.0,0.2,0.1,1,1.5 mp,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,-5.25 k,2,-60,-10,0 k,3,-55,-5.25 k,4,-50 k,5,-45,4.75 k,6,-40,9 k,7,-35, 12.75 k,8,-30,16 k,9,-25, 18.75 k,10,-20, 21 k,11,-15,22.75 k,12,-10,24 k,13,-5,24.75 k,14,0,25 k,15,5,24.75 k,16,10,24 k,17,15,22.75 k,18,20,21 k,19,25, 18.75 k,20,30,16 k,21,35,12.75 k,22,40,9 k,23,45,4.75 k,24,50 k,25,55,-5.25 k,26,60,-10 k,27,65,-5.25 *do,i,1,29 k,27+i,5*i-75 *enddo kgen,2,all,,,,,21,,0 !绘拱圈框架r1 *do,i,1,26 l,i,i+1 l,i+56,i+57 *enddo l,1,28 l,27,56 l,57,84 l,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,1,29 l,i+27,i+83 *enddo !绘制纵梁r5 *do,i,1,28 l,i+27,i+28 l,i+83,i+84 *enddo !绘腹拱墩r5 *do,i,1,3 l,i+56,i+84 l,i,i+28 l,i+24,i+52 l,i+80,i+108 *enddo !绘桥梁吊杆r4r5 *do,i,1,19 l,i+4,i+32 l,i+60,i+88 *enddo !绘桥面r3 *do,i,1,28 a,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r6 lsel,s,,,70,166 latt,1,6,1 lesize,all,2 lmesh,all !拱间联系r2 lsel,s,,,59,67 lsel,a,,,57,57 lsel,a,,,69,69 latt,1,2,1 lesize,all,2 lmesh,all !悬索 lsel,s,,,167,172 latt,1,5,2 lesize,all,,,1 lmesh,all lsel,s,,,173,198 latt,1,4,2 lesize,all,,,1 lmesh,all lsel,s,,,199,204 latt,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,all dk,26,all dk,58,all dk,82,all dk,28, , , , 1,uy,uz dk,56, , , , 1,uy,uz dk,84, , , , 1,uy,uz dk,112, , , , 1,uy,uz !重力G acel,0,9.8,0, pstres,1 /solu antype,2 modopt,lanb,20 mxpand,10,0,100 pstres,1 solve /post1 set,list set,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