某高速公路隧道二次衬砌ansys应力分析

1、目录一、设计要求2二、荷载计算2三、模型建立与分析51.通过Autocad建模查询各关键点坐标52.分析标题、单元类型、材料属性、实常数定义、截面常数定义：53.生成关键点：64.生衬砌圆弧65.划分单元76.生成弹簧单元并删除外圈辅助单元和辅助线87.施加约束88.在每个单元中间生成一关键点以此查询半单元长度99.计算节点上应施加的荷载910.荷载施加1011.施加重力加速度和定义生死单元1012.求解和定义单元表10四、结果分析与处理111.查看变型图杀死受拉弹簧单元112.最扣结果14a)变形图14b)弯矩图14c)剪力图15d)轴力图153.各单元内力详见附表15一、 设计要求某高速公

2、路隧道，采用矿山法施工，隧道位于级围岩中。其中，级围岩隧道埋深为26.257m。隧道内轮廓断面如下图，用ANSYS分析隧道二衬(二衬采用C30混凝土，厚度为50cm )内力，做出内力图，列出各单元内力值。材料物理力学指标如下：二、 荷载计算根据公路隧道设计规范_JTG_D70-2004规定如下：623 级围岩中探埋隧道的围岩压力为松散荷载时，具垂直均布压力及水平均布压力可按下列公式计算：1 垂直均布压力按式(623)计算。附录E 浅埋隧道荷载的计算方法E01 浅埋和深埋隧道的分界，按荷载等效高度值，并结合地质条件、施工方法等因素综合判定。按荷载等效高度的判定公式为故：隧道实际埋深=19+7.2

3、67=26.267m =30.24m 故属于浅埋隧道！通过Autocad查询得衬砌截面外边周长c=33.8017m二衬砌荷载按计算荷载的的30%计，并采用基本荷载组合故：三、 模型建立与分析1. 通过Autocad建模查询各关键点坐标2. 分析标题、单元类型、材料属性、实常数定义、截面常数定义：/prep7 /title,Mechanical analysis on Hiway-Tunnel Support Structural et,1,3 et,2,14 mp,ex,1,30e9mp,prxy,1,0.2 mp,dens,1,2500 r,1,0.5,0.0104166667,0.5r,2

4、,100e6 SECTYPE, 1, BEAM, RECT, , 0 SECOFFSET, CENT SECDATA,1,0.5,0,0,0,0,0,0,0,03. 生成关键点：k,1,-4.81872390,-2.04053317 k,2,-5.49815868,-1.30105769 k,3,-5.65000000,0.00000000 k,4,0.00000000,5.65000000 k,5,5.65000000,0.00000000 k,6,5.49815868,-1.30105769 k,7,4.81872390,-2.04053317 k,8,-5.28122168,-2.936

5、33418 k,9,-6.25730539,-1.96970284 k,10,-6.56000000,0.00000000 k,11,0.00000000,6.56000000 k,12,6.56000000,0.00000000 k,13,6.25730539,-1.96970284 k,14,5.28122168,-2.93633418 k,154. 生衬砌圆弧larc,1,2,15,2.52larc,2,3,15,5.65larc,3,4,15,5.65larc,4,5,15,5.65larc,5,6,15,5.65larc,6,7,15,2.52larc,7,1,15,14.25 la

6、rc,8,9,15,3.52larc,9,10,15,6.65 larc,10,11,15,6.65 larc,11,12,15,6.65 larc,12,13,15,6.65 larc,13,14,15,3.52 larc,14,8,15,15.25 5. 划分单元lsel,1,7,1 LATT,1,1,1, , , , lsel,1 lesize,all,4 lmesh,all lsel,2 lesize,all,6 lmesh,all lsel,3 lesize,all,34 lmesh,all lsel,4 lesize,all,34 lmesh,all lsel,5 lesize,a

7、ll,6 lmesh,all lsel,6 lesize,all,4 lmesh,all lsel,7 lesize,all,36 lmesh,all lsel,8 lesize,all,4 lmesh,all lsel,9 lesize,all,6 lmesh,all lsel,10 lesize,all,34 lmesh,all lsel,11 lesize,all,34 lmesh,all lsel,12 lesize,all,6 lmesh,all lsel,13 lesize,all,4 lmesh,all lsel,14 lesize,all,36 lmesh,all6. 生成弹簧

8、单元并删除外圈辅助单元和辅助线type,2 real,2 e,1,125 e,3,127 e,4,128 e,5,129 e,2,126 e,7,131 e,8,132 e,9,133 e,10,134e,11,135e,6,130 e,13,137e,14,138e,15,139e,16,140e,17,141e,18,142e,19,143e,20,144e,21,145e,23,147e,24,148e,25,149e,26,150lsel,8,14,1,1LCLEAR,all LDELE,all 7. 施加约束nsel,125,248,1,1 d,all,uxd,all,uy8. 在每

9、个单元中间生成一关键点以此查询半单元长度kl,1,0.125,20 kl,1,0.25,21kl,1,0.375,22 kl,1,0.5,23 kl,1,0.625,24 kl,1,0.75,25kl,1,0.875,26 kl,1,1,27 kl,2,0.0833333333333333,28 kl,2,0.25,30kl,2,0.333333333333333,31 .9. 计算节点上应施加的荷载通过如下图名利查询每个单元中间的关键点坐标，导入excel计算dx和dy，以此计算节点上应施加的荷载。10. 荷载施加nsel,allf,3,fy,91.5343921844592f,5,fy,7

10、3.4627770237175f,7,fy,20.4227926854801f,8,fy,16.3748090989441f,112,fx,160.36475273532f,113,fx,158.439829360016f,115,fx,153.640711469702f,116,fx,150.772055048544f,117,fx,147.594947703387f,119,fx,140.33168400917911. 施加重力加速度和定义生死单元nropt,full,allseloutres,all,allacel,1012. 求解和定义单元表esel,all/solusolve/post1etable,mi,smisc,6etable,mj,smisc,12etable,ni,smisc,1etable,nj,smisc,7etable,qi,smisc,2et