某高速公路隧道二次襯砌ansys應(yīng)力分析

1、目錄一、設(shè)計要求2二、荷載計算2三、模型建立與分析51.通過Autocad建模查詢各關(guān)鍵點坐標52.分析標題、單元類型、材料屬性、實常數(shù)定義、截面常數(shù)定義：53.生成關(guān)鍵點：64.生襯砌圓弧65.劃分單元76.生成彈簧單元并刪除外圈輔助單元和輔助線87.施加約束88.在每個單元中間生成一關(guān)鍵點以此查詢半單元長度99.計算節(jié)點上應(yīng)施加的荷載910.荷載施加1011.施加重力加速度和定義生死單元1012.求解和定義單元表10四、結(jié)果分析與處理111.查看變型圖殺死受拉彈簧單元112.最扣結(jié)果14a)變形圖14b)彎矩圖14c)剪力圖15d)軸力圖153.各單元內(nèi)力詳見附表15一、 設(shè)計要求某高速公

2、路隧道，采用礦山法施工，隧道位于級圍巖中。其中，級圍巖隧道埋深為26.257m。隧道內(nèi)輪廓斷面如下圖，用ANSYS分析隧道二襯(二襯采用C30混凝土，厚度為50cm )內(nèi)力，做出內(nèi)力圖，列出各單元內(nèi)力值。材料物理力學(xué)指標如下：二、 荷載計算根據(jù)公路隧道設(shè)計規(guī)范_JTG_D70-2004規(guī)定如下：623 級圍巖中探埋隧道的圍巖壓力為松散荷載時，具垂直均布壓力及水平均布壓力可按下列公式計算：1 垂直均布壓力按式(623)計算。附錄E 淺埋隧道荷載的計算方法E01 淺埋和深埋隧道的分界，按荷載等效高度值，并結(jié)合地質(zhì)條件、施工方法等因素綜合判定。按荷載等效高度的判定公式為故：隧道實際埋深=19+7.2

3、67=26.267m =30.24m 故屬于淺埋隧道！通過Autocad查詢得襯砌截面外邊周長c=33.8017m二襯砌荷載按計算荷載的的30%計，并采用基本荷載組合故：三、 模型建立與分析1. 通過Autocad建模查詢各關(guān)鍵點坐標2. 分析標題、單元類型、材料屬性、實常數(shù)定義、截面常數(shù)定義：/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. 生成關(guān)鍵點：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. 生襯砌圓弧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. 劃分單元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. 生成彈簧

8、單元并刪除外圈輔助單元和輔助線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. 施加約束nsel,125,248,1,1 d,all,uxd,all,uy8. 在每

9、個單元中間生成一關(guān)鍵點以此查詢半單元長度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. 計算節(jié)點上應(yīng)施加的荷載通過如下圖名利查詢每個單元中間的關(guān)鍵點坐標，導(dǎo)入excel計算dx和dy，以此計算節(jié)點上應(yīng)施加的荷載。10. 荷載施加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義生死單元nropt,full,allseloutres,all,allacel,1012. 求解和定義單元表esel,all/solusolve/post1etable,mi,smisc,6etable,mj,smisc,12etable,ni,smisc,1etable,nj,smisc,7etable,qi,smisc,2et