关于ansys钢筋混凝土建立分离式模型的问题

各位大神，我近期ZUO了一个例子，钢筋 混凝土梁的弹塑性分析，结果发现结果不收敛，难道就因为我没有用什么弹性垫片或者约束时候多出一块吗？因为我建立模型抄书上的命令流，我不知道入股加上约束那边多出的小块，划分网格建立钢筋时候是不是还是有规律的。。。我想知道我的程序要怎么修改才行呢？
/FILENAME,RC-BEAM
/TITLE,ANALYSIS OF A RC-BEAM
/PREP7
! 定义单元类型
ET,1,LINK8 !定义钢筋单元
ET,2,SOLID65 !定义混凝土单元
R,1,28.3E-6,, !箍筋截面积
R,2,113.1E-6,, !架立筋的截面积
R,3,314.1E-6,, !纵筋截面积
R,4, !混凝土solid65单元定义一个实参数组
!定义钢筋材料模型与参数
MP,EX,1,2.0E11 !线弹性参数
MP,PRXY,1,0.3
MP,DENS,1,7850
TB,BKIN,1,1,2,1 !钢筋塑性参数
TBDATA,,3.6E8,0.0
!定义混凝土材料
MP,EX,2,3E10 !线弹性参数
MP,PRXY,2,0.3
MP,DENS,2,2500
TB,KINH,2,1,8, !混凝土应力应变数据
TBTEMP,0
TBPT,,0.0001,3E6
TBPT,,0.0004,3.9683E6
TBPT,,0.0006,5.148E6
TBPT,,0.0009,9.9743E6
TBPT,,0.0012,12.012E6
TBPT,,0.0016,13.728E6
TBPT,,0.0020,14.3E6
TBPT,,0.0033,14.3E6
TB,CONC,2,1,9, !定义混凝土的破坏参数
TBDATA,,0.5,0.95,1.43E6,-1
!建立几何模型
BLOCK,0.0,12,0,0.2,0,0.4,
/VIEW,1,1,2,3
/REP,FAST
LPLOT
/REPLOT
!划分混凝土网格
VATT,2,4,2
LSEL,S,LINE,,4,5,1
LSEL,A,LINE,,2,7,5
LESIZE,ALL,0.05
LSEL,INVE
LESIZE,ALL,0.025
LSEL,ALL
VMESH,ALL
!建立钢筋单元
NSEL,S,LOC,X,0.15
NPLOT
/VIEW,1,1
/REP,FAST
/REPLOT
TYPE,1
MAT,1
REAL,1
!循环建立箍筋
*DO,I,12003,12078,15
E,I,I+15
*ENDDO
*DO,I,12093,12080,-1
E,I,I-1
*ENDDO
*DO,I,12079,12004,-15
E,I,I-15
*ENDDO
*DO,I,11989,12002,1
E,I,I+1
*ENDDO
ESEL,S,TYPE,,1 !选择第一圈箍筋
EGEN,79,315,ALL,,,,,,,,0.15,0,0,
ALLSEL,ALL
!建立纵筋单元：
TYPE,1 !设置纵筋单元属性
MAT, 1
REAL, 2
*DO,I,11779,36664,105
E,I,I+105
*ENDDO
*DO,I,11824,36709,105
E,I,I+105
*ENDDO
*DO,I,11869,36754,105
E,I,I+105
*ENDDO
ALLSEL,ALL
!建立架立筋单元
TYPE,1
MAT,1
REAL,3
*DO,I,11793,36678,105
E,I,I+105
*ENDDO
*DO,I,11883,36768,105
E,I,I+105
*ENDDO
ALLSEL,ALL
ESEL,S,TYPE,,1
EPLOT
/VIEW,1,1,2,3
/REP
!施加位移约束
NSEL,S,LOC,X,0
D,ALL,ALL
ALLSEL,ALL
NSEL,S,LOC,X,12
D,ALL,ALL
ALLSEL,ALL
!施加载荷
NSEL,S,LOC,Z,0.4
SF,ALL,PRES,-3E5
ALLSEL,ALL
ACEL,0,0,9.8
FINI
/SOLU
ANTYPE,0
NLGEOM,1
NROPT,FULL,,
EQSLV,SPAR,,0,
TIME,1.0
AUTOTS,1
LNSRCH,1
NSUBST,150
KBC,0
CNVTOL,U,,0.1,0,,
NEQIT,50,
PRED,ON,,ON
OUTRES,ALL,ALL
ALLSEL,ALL
SOLVE
......