钢筋混凝土简支梁非线性分析，怎么调都不收敛，求高手指点，感激不尽

下面这是命令流，拜托各位了，急。。。。。。。。。

*******************简支梁非线性分析********************
FINISH
/CLEAR
/CONFIG,NRES,2000
/PREP7

!定义单元与材料性质
ET,1,SOLID65
KEYOPT,1,1,1
KEYOPT,1,7,1
MP,EX,1,13585
MP,PRXY,1,0.2
FC=14.3
FT=1.43
TB,CONCR,1
TBDATA,,0.5,0.99,FT,-1
TB,KINH,1,,11
TBPT,,0.0002,FC*0.19
TBPT,,0.0004,FC*0.36
TBPT,,0.0006,FC*0.51
TBPT,,0.0008,FC*0.64
TBPT,,0.0010,FC*0.75
TBPT,,0.0012,FC*0.84
TBPT,,0.0014,FC*0.91
TBPT,,0.0016,FC*0.96
TBPT,,0.0018,FC*0.99
TBPT,,0.0020,FC
TBPT,,0.0033,FC
TBPLOT

ET,2,LINK8
MP,EX,2,2.0
MP,PRXY,2,0.3
TB,BISO,2
TBDATA,,300,0
PI=ACOS(-1)
R,1,0.25*PI*22*22
R,2,0.25*PI*10*10

!创建几何模型
BLC4,,,150,300,1000
WPOFF,,,50
VSBW,ALL
*DO,I,1,9
WPOFF,,,100
VSBW,ALL
*ENDDO
WPCSYS,-1
WPROTA,,,90
WPOFF,,,30
VSBW,ALL
WPOFF,,,90
VSBW,ALL
WPCSYS,-1
WPROTA,,-90
WPOFF,,,30
VSBW,ALL
WPOFF,,,240
VSBW,ALL
WPCSYS,-1

!划分钢筋网格
ELEMSIZE=50
LSEL,S,LOC,X,30
LSEL,R,LOC,Y,30
CM,ZJL,LINE
LATT,2,1,2
LESIZE,ALL,ELEMSIZE

LSEL,S,LOC,X,120
LSEL,R,LOC,Y,30
CM,ZJR,LINE
LATT,2,1,2
LESIZE,ALL,ELEMSIZE

LSEL,S,LOC,X,30
LSEL,R,LOC,Y,270
CM,JLL,LINE
LATT,2,2,2
LESIZE,ALL,ELEMSIZE

LSEL,S,LOC,X,120
LSEL,R,LOC,Y,270
CM,JLR,LINE
LATT,2,2,2
LESIZE,ALL,ELEMSIZE

LSEL,S,TAN1,Z,0
LSEL,R,LOC,X,30,120
LSEL,R,LOC,Y,30,270
CM,GJ,LINE
LATT,2,2,2
LESIZE,ALL,ELEMSIZE

CMSEL,S,ZJL
CMSEL,A,ZJR
CMSEL,A,JLL
CMSEL,A,JLR
CMSEL,A,GJ
LMESH,ALL
LSEL,ALL
/ESHAPE,1
EPLOT

!划分混凝土网格
VSEL,ALL
VATT,1,,1
MSHKEY,1
ESIZE,50
VMESH,ALL
ALLSEL,ALL

!施加约束和荷载
LSEL,S,LOC,Z,0
LSEL,R,LOC,Y,0
DL,ALL,,UY
DL,ALL,,UZ
LSEL,S,LOC,Z,1000
LSEL,R,LOC,Y,0
DL,ALL,,UY
ASEL,S,LOC,X,0
DA,ALL,UX
ALLSEL,ALL

P=50000
Q=P/100/150
ASEL,S,LOC,Z,450,550
ASEL,R,LOC,Y,300
SFA,ALL,1,PRES,Q
ALLSEL,ALL

!求解控制设置与求解
/SOLU
ANTYPE,0
NLGEOM,ON
NSUBST,100
OUTRES,ALL,ALL
AUTOTS,ON
NEQIT,100
CNVTOL,F,,0.05
SOLVE

!进入POST1后处理
/POST1
SET,LAST
PLDISP,1
ESEL,S,TYPE,,2
ETABLE,SAXL,LS,1
PLLS,SAXL,SAXL
ESEL,S,TYPE,,1
/DEVICE,VECTOR,ON
PLCRACK

!进入POST26后处理
/POST26
NSOL,2,534,U,Y
PROD,3,2,,,,,,-1
PROD,4,1,,,,,,P/1000
/AXLAB,X,UY
/AXLAB,Y,FY
XVAR,3
PLVAR,4
PRVAR,3,4