埋設在地下的排水管道
rpc管道混凝土管道用solid45單元模擬，link8模擬縱向鋼筋和箍筋，直接建立單元，采用復制的方式直接生成實體。讓link單元和solid單元共用節點，（nummrg和numcmp命令）這樣就省去了耦合和添加約束方程，預應力采用施加初始應變的方式。約束采用簡直方式。計算以后在支座處有比較名顯的應力集中現象。這是我做的思路，有命令流，有問題大家可以交流。
附：ansys log file
/prep7
et,1,solid45
mp,ex,1,4.5e10
mp,prxy,1,0.25
et,2,link8
mp,ex,2,2.0e11
mp,prxy,2,0.3
R,1,137.4e-6, ,
csys,1
n,1,0.52
n,2,0.56
n,3,0.6
NGEN,2,3,P51X, , , ,18, ,1,
NGEN,2,6,P51X, , , , ,0.05,1,
/VIEW, 1 ,1,1,1
e,1,2,5,4,7,8,11,10
e,2,3,6,5,8,9,12,11
eplot
ENGEN,40,40,12,P51X, , , , , , , , ,18, ,
nummrg,all
numcmp,all
ENGEN,4000,100,120,P51X, , , , , , , , , ,0.05,
nummrg,all
numcmp,all
nsel,s,loc,x,0.56
nsel,r,loc,z,0.25
nplot,1
l,302,305
*repeat,19,3,3
l,359,302
nsel,s,loc,x,0.56
nsel,r,loc,z,0.55
nplot,1
e,662,665
*repeat,19,3,3
e,719,662
nsel,s,loc,x,0.56
nsel,r,loc,z,0.85
nplot,1
e,1022,1025
*repeat,19,3,3
e,1079,1022
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,1.15
nplot,1
e,1382,1385
*repeat,19,3,3
e,1439,1382
nsel,s,loc,x,0.56
nsel,r,loc,z,1.45
nplot,1
e,1742,1745
*repeat,19,3,3
e,1799,1742
nsel,s,loc,x,0.56
nsel,r,loc,z,1.75
nplot,1
e,2102,2105
*repeat,19,3,3
e,2159,2102
nsel,s,loc,x,0.56
nsel,r,loc,z,2.05
nplot,1
e,2462,2465
*repeat,19,3,3
e,2519,2462
nsel,s,loc,x,0.56
nsel,r,loc,z,2.35
nplot,1
e,2822,2825
*repeat,19,3,3
e,2879,2822
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,2.65
nplot,1
e,3182,3185
*repeat,19,3,3
e,3239,3182
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,2.95
nplot,1
e,3542,3545
*repeat,19,3,3
e,3599,3542
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,3.25
nplot,1
e,3902,3905
*repeat,19,3,3
e,3959,3902
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,3.55
nplot,1
e,4262,4265
*repeat,19,3,3
e,4319,4262
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,3.85 #p#分頁標題#e#
nplot,1
e,4622,4625
*repeat,19,3,3
e,4679,4622
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,4.15
nplot,1
e,4982,4985
*repeat,19,3,3
e,5039,4982
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,4.45
nplot,1
e,5342,5345
*repeat,19,3,3
e,5399,5342
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,4.75
nplot,1
e,5702,5705
*repeat,19,3,3
e,5759,5702
SAVE
ALLSEL,ALL
ESEL,S,TYPE,,2
EPLOT
ALLSEL,ALL
nsel,s,loc,x,0.56
nsel,r,loc,y,0
e,2,8
e,8,122
e,122,182
*repeat,98,60,60
nsel,s,loc,x,0.56
nsel,r,loc,y,36
nplot,1
e,14,17
e,17,128
e,128,188
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,72
nplot,1
e,26,29
e,29,134
e,134,194
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,108
nplot,1
e,38,41
e,41,140
e,140,200
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,144
nplot,1
e,50,53
e,53,146
e,146,206
*repeat,98,60,60
nsel,s,loc,x,0.56
nsel,r,loc,y,180
nplot,1
e,62,65
e,65,152
e,152,212
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,216
nplot,1
e,74,77
e,77,158
e,158,218
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,252
nplot,1
e,86,89
e,89,164
e,164,224
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,288
nplot,1
e,98,101
e,101,170
e,170,230
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,324
nplot,1
e,110,113
e,113,176
e,176,236
*repeat,98,60,60
SAVE
allsel,all
ESEL,S,TYPE,,2
EPLOT
nummrg,all
numcmp,all
nlist
ESEL,S,TYPE,,2
BFE,P51X,TEMP,1,-375, , ,!施加預應力，已改為用初應變initial strain施加
施加其它荷載和約束以及后處理的命令省略，在后處理中注意轉換結果坐標系到cylinder coordinate system
結果1：每隔20cm配一道箍筋，施加1250 a的預應力。
結果2：每隔30cm配一道箍筋，施加1250 a的預應力。
rpc管道混凝土管道用solid45單元模擬，link8模擬縱向鋼筋和箍筋，直接建立單元，采用復制的方式直接生成實體。讓link單元和solid單元共用節點，（nummrg和numcmp命令）這樣就省去了耦合和添加約束方程，預應力采用施加初始應變的方式。約束采用簡直方式。計算以后在支座處有比較名顯的應力集中現象。這是我做的思路，有命令流，有問題大家可以交流。
附：ansys log file
/prep7
et,1,solid45
mp,ex,1,4.5e10
mp,prxy,1,0.25
et,2,link8
mp,ex,2,2.0e11
mp,prxy,2,0.3
R,1,137.4e-6, ,
csys,1
n,1,0.52
n,2,0.56
n,3,0.6
NGEN,2,3,P51X, , , ,18, ,1,
NGEN,2,6,P51X, , , , ,0.05,1,
/VIEW, 1 ,1,1,1
e,1,2,5,4,7,8,11,10
e,2,3,6,5,8,9,12,11
eplot
ENGEN,40,40,12,P51X, , , , , , , , ,18, ,
nummrg,all
numcmp,all
ENGEN,4000,100,120,P51X, , , , , , , , , ,0.05,
nummrg,all
numcmp,all
nsel,s,loc,x,0.56
nsel,r,loc,z,0.25
nplot,1
l,302,305
*repeat,19,3,3
l,359,302
nsel,s,loc,x,0.56
nsel,r,loc,z,0.55
nplot,1
e,662,665
*repeat,19,3,3
e,719,662
nsel,s,loc,x,0.56
nsel,r,loc,z,0.85
nplot,1
e,1022,1025
*repeat,19,3,3
e,1079,1022
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,1.15
nplot,1
e,1382,1385
*repeat,19,3,3
e,1439,1382
nsel,s,loc,x,0.56
nsel,r,loc,z,1.45
nplot,1
e,1742,1745
*repeat,19,3,3
e,1799,1742
nsel,s,loc,x,0.56
nsel,r,loc,z,1.75
nplot,1
e,2102,2105
*repeat,19,3,3
e,2159,2102
nsel,s,loc,x,0.56
nsel,r,loc,z,2.05
nplot,1
e,2462,2465
*repeat,19,3,3
e,2519,2462
nsel,s,loc,x,0.56
nsel,r,loc,z,2.35
nplot,1
e,2822,2825
*repeat,19,3,3
e,2879,2822
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,2.65
nplot,1
e,3182,3185
*repeat,19,3,3
e,3239,3182
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,2.95
nplot,1
e,3542,3545
*repeat,19,3,3
e,3599,3542
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,3.25
nplot,1
e,3902,3905
*repeat,19,3,3
e,3959,3902
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,3.55
nplot,1
e,4262,4265
*repeat,19,3,3
e,4319,4262
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,3.85 #p#分頁標題#e#
nplot,1
e,4622,4625
*repeat,19,3,3
e,4679,4622
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,4.15
nplot,1
e,4982,4985
*repeat,19,3,3
e,5039,4982
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,4.45
nplot,1
e,5342,5345
*repeat,19,3,3
e,5399,5342
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,z,4.75
nplot,1
e,5702,5705
*repeat,19,3,3
e,5759,5702
SAVE
ALLSEL,ALL
ESEL,S,TYPE,,2
EPLOT
ALLSEL,ALL
nsel,s,loc,x,0.56
nsel,r,loc,y,0
e,2,8
e,8,122
e,122,182
*repeat,98,60,60
nsel,s,loc,x,0.56
nsel,r,loc,y,36
nplot,1
e,14,17
e,17,128
e,128,188
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,72
nplot,1
e,26,29
e,29,134
e,134,194
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,108
nplot,1
e,38,41
e,41,140
e,140,200
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,144
nplot,1
e,50,53
e,53,146
e,146,206
*repeat,98,60,60
nsel,s,loc,x,0.56
nsel,r,loc,y,180
nplot,1
e,62,65
e,65,152
e,152,212
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,216
nplot,1
e,74,77
e,77,158
e,158,218
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,252
nplot,1
e,86,89
e,89,164
e,164,224
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,288
nplot,1
e,98,101
e,101,170
e,170,230
*repeat,98,60,60
SAVE
nsel,s,loc,x,0.56
nsel,r,loc,y,324
nplot,1
e,110,113
e,113,176
e,176,236
*repeat,98,60,60
SAVE
allsel,all
ESEL,S,TYPE,,2
EPLOT
nummrg,all
numcmp,all
nlist
ESEL,S,TYPE,,2
BFE,P51X,TEMP,1,-375, , ,!施加預應力，已改為用初應變initial strain施加
施加其它荷載和約束以及后處理的命令省略，在后處理中注意轉換結果坐標系到cylinder coordinate system
結果1：每隔20cm配一道箍筋，施加1250 a的預應力。
結果2：每隔30cm配一道箍筋，施加1250 a的預應力。
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