这是最终的模型，
这是施加约束后的情况，下面是命令流
FINISH
/CLEAR
/FILNAME,RCB,1
/TITLE,RCB
/PREP7
ET,1,SOLID65
ET,2,LINK8
ET,3,SOLID45
ET,4,PLANE42
R,1,,,,,,,
R,2,113.09
R,3,201.06
R,4,50.27 !单筋面积
MP,EX,1,25460 !初始弹性模量
MP,PRXY,1,0.2
!FC=26.8.0，FT=2.4 !混凝土单轴抗压强度和单轴抗拉强度
!破坏准则
tb,concr,1,1,9
tbtemp,0
tbdata,,0.5,0.95,2.4,-1 !定义混凝土材料及相关参数，关闭压碎
!定义混凝土应力应变曲线,用MISO模型
TB,MISO,1,,11
TBPT,,0.0002,5.092
TBPT,,0.0004,9.648
TBPT,,0.0006,13.668
TBPT,,0.0008,17.152
TBPT,,0.0010,20.1
TBPT,,0.0012,22.521
TBPT,,0.0014,24.388
TBPT,,0.0016,25.728
TBPT,,0.0018,26.532
TBPT,,0.0020,26.8
TBPT,,0.0033,36.8
MP,EX,2,2E5
MP,PRXY,2,0.2
tb,bkin,2,1,2,1
tbdata,,350 !屈服应力
MP,EX,3,2e5
MP,PRXY,3,0.25
TB,BKIN,3,1,2,1
TBDATA,,360,20000,,,,
N,1,0
N,2,15
N,12,185
FILL,2,12,9
N,13,200
NGEN,2,13,1,13,1,0,25,0
NGEN,11,13,14,26,1,0,31,0
NGEN,2,13,144,156,1,0,15,0
/VIEW,1,1,1,1
NGEN,2,1000,1,169,1,0,0,50
NGEN,8,1000,1001,1169,1,0,0,100
NGEN,5,1000,8001,8169,1,0,0,150
NGEN,8,1000,12001,12169,1,0,0,100
NGEN,2,1000,19001,19169,1,0,0,50
TYPE,2,
REAL,4
MAT,2
*do,ii,1015,1024,1
e,ii,ii+1
*enddo
*do,ii,1145,1154,1
e,ii,ii+1
*enddo
*do,ii,1015,1132,13
e,ii,ii+13
*enddo
*do,ii,1025,1142,13
e,ii,ii+13
*enddo
egen,19,1000,1,40,1
TYPE,2
REAL,2
MAT,2
*do,ii,145,19145,1000
e,ii,ii+1000
*enddo
*do,ii,155,19155,1000
e,ii,ii+1000
*enddo
TYPE,2
REAL,3
MAT,2
*do,ii,15,19015,1000
e,ii,ii+1000
*enddo
*do,ii,25,19025,1000
e,ii,ii+1000
*enddo
/view,1,1,1,1
/pnum,elem,0
/pnum,node,0
/eshape,1
eplot
K,1,0
K,2,15
K,3,185
K,4,200
K,5,200,25
K,6,200,335
K,7,200,350
K,8,185,350
K,9,15,350
K,10,0,350
K,11,0,335
K,12,0,25
A,1,2,3,4,5,6,7,8,9,10,11,12
TYPE,4
LESIZE,1,,,1
LESIZE,2,,,10
LESIZE,3,,,1
LESIZE,4,,,1
LESIZE,5,,,10
LESIZE,6,,,1
LESIZE,7,,,1
LESIZE,8,,,10
LESIZE,9,,,1
LESIZE,10,,,1
LESIZE,11,,,10
LESIZE,12,,,1
LSEL,S,,,1,3,1
LCCAT,ALL
LSEL,S,,,4,6,1
LCCAT,ALL
LSEL,S,,,7,9,1
LCCAT,ALL
LSEL,S,,,10,12,1
LCCAT,ALL
ALLSEL
AMESH,1
LSEL,S,LCCA
LDELE,all
TYPE,1
REAL,1
MAT,1
EXTOPT,ESIZE,42
EXTOPT,ACLEAR,1
VEXT,ALL,,,,,2100
K,25,0,0,100
K,26,200,0,100
K,27,200,-20,100
K,28,0,-20,100
A,25,26,27,28
TYPE,4
LESIZE,37,,,4
LESIZE,40,,,1
LESIZE,39,,,4
LESIZE,38,,,1
AMESH,15
TYPE,3
REAL,1
MAT,3
EXTOPT,ESIZE,4
EXTOPT,ACLEAD,1
VEXT,15,,,,,100
VGEN,2,2,,,,,1800
K,41,0,350,700
K,42,200,350,700
K,43,200,370,700
K,44,0,370,700
A,41,42,43,44
TYPE,4
LESIZE,61,,,4
LESIZE,62,,,1
LESIZE,63,,,4
LESIZE,64,,,1
AMESH,27
TYPE,3
REAL,1
MAT,3
EXTOPT,ESIZE,4
EXTOPT,ACLEAR,1
VEXT,27,,,,,100
VGEN,2,4,,,,,600
nummrg,all
numcmp,all !合并压缩复制节点和单元
/SOLU
NSEL,S,LOC,Y,-20
NSEL,R,LOC,Z,150
D,ALL,UY
D,ALL,UX
NSEL,S,LOC,Y,-20
NSEL,R,LOC,Z,1950
D,ALL,all
ALLSEL,ALL
F,7427,FY,-120000
F,7386,FY,-120000
nlgeom,on
NSUBST,100
OUTRES,ALL,ALL
NEQIT,50
pred,on
CNVTOL,U, ,0.05,2
allsel
SOLVE
这是整个命令流，我在书上看的混凝土用MISO模型，用15.0版的ansys是不能够有下降段的。怎样才能可以设置下降段呢？
现在这个出现的主演问题就是
u
我尝试着把网格划分变粗一点也问题也没有得到解决，请问各位高手，对于我这种结构，改怎样处理这种问题啊，第一次接触ANSYS，有很多不清楚，请各位高手帮忙
崔国勇 
