Question

在ANSYS里怎么建立钢筋混凝土模型？

Answer 1

有两种方法：一种是整体式建模；另一种是分离式建模。
分离式通过网格划分，得到钢筋位置；一般采用link单元模拟钢筋。
举例说明：
整体式命令流如下：
/PREP7
!
单元属性
ET,1,SOLID65
KEYOPT,1,1,0
KEYOPT,1,5,0
KEYOPT,1,6,0
KEYOPT,1,7,1
!实参数1：未配筋
R,1,2,
,
,
,2,
,
RMORE,
,
,2,
,
,
,
!实参数2：X方向配筋
R,2,2,.05,
,
,2,
,
RMORE,
,
,2,
,
,
,
!材料属性
!混凝土基本材料属性
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,30e9
MPDATA,PRXY,1,,.2
!屈服准则
TB,MISO,1,1,5,
TBTEMP,0
TBPT,,0.0005,15e6
TBPT,,0.001,21e6
TBPT,,0.0015,24e6
TBPT,,0.002,27e6
TBPT,,0.003,24e6
!破坏准则
TB,CONC,1,1,9,
TBTEMP,0
TBDATA,,.5,.9,3e6,30e6,,
TBDATA,,,,1,,,
MPTEMP,,,,,,,,
MPTEMP,1,0
!钢材基本属性
MPDATA,EX,2,,200e9
MPDATA,PRXY,2,,.27
!屈服准则
TB,BISO,2,1,2,
TBTEMP,0
TBDATA,,310e6,2e9,,,,
!建立模型
K,1,,,,
K,2,3,,,
KGEN,2,1,2
,1
,
,.05,
,
,0
KGEN,2,1,2
,1
,
,0.5,
,
,0
A,1,2,4,3
A,3,4,6,5
VEXT,1,2
,1
,0,0,.2,,,,
VSEL,
,
,
,
1
VATT,
1,
2,
1,
0
VSEL,
,
,
,
2
VATT,
1,
1,
1,
0
LSEL,
all
LESIZE,all,.2,
,
,
,
,
,
,1
VSEL,
all
VMESH,all
/SOLU
ANTYPE,0
!力二范数收敛，2%
CNVTOL,F,
,0.02,2,
,
!加约束
D,3,
,
,
,
,
,UY,
,
,
,
,
D,35,
,
,
,
,
,UY,
,
,
,
,
D,16,
,
,
,
,
,UY,
,
,
,
,
D,48,
,
,
,
,
,UY,
,
,
,
,
D,35,
,
,
,
,
,ALL,
,
,
,
,
D,48,
,
,
,
,
,UZ,
,
,
,
,
!加竖向位移荷载
D,75,
,-0.01,
,
,
,UY,
,
,
,
,
D,123,
,-0.01,
,
,
,UY,
,
,
,
,
!加载最少分为20步
NSUBST,20,1000000,20
!输出每步结果
OUTRES,ALL,1
!每步至少迭代25次
CUTCONTROL,NOITERPRED,1
SOLVE

Answer 2

有两种方法：一种是整体式建模；另一种是分离式建模。
分离式通过网格划分，得到钢筋位置；一般采用link单元模拟钢筋。
举例说明：
整体式命令流如下：
/PREP7
!
单元属性
ET,1,SOLID65
KEYOPT,1,1,0
KEYOPT,1,5,0
KEYOPT,1,6,0
KEYOPT,1,7,1
!实参数1：未配筋
R,1,2,
,
,
,2,
,
RMORE,
,
,2,
,
,
,
!实参数2：X方向配筋
R,2,2,.05,
,
,2,
,
RMORE,
,
,2,
,
,
,
!材料属性
!混凝土基本材料属性
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,30e9
MPDATA,PRXY,1,,.2
!屈服准则
TB,MISO,1,1,5,
TBTEMP,0
TBPT,,0.0005,15e6
TBPT,,0.001,21e6
TBPT,,0.0015,24e6
TBPT,,0.002,27e6
TBPT,,0.003,24e6
!破坏准则
TB,CONC,1,1,9,
TBTEMP,0
TBDATA,,.5,.9,3e6,30e6,,
TBDATA,,,,1,,,
MPTEMP,,,,,,,,
MPTEMP,1,0
!钢材基本属性
MPDATA,EX,2,,200e9
MPDATA,PRXY,2,,.27
!屈服准则
TB,BISO,2,1,2,
TBTEMP,0
TBDATA,,310e6,2e9,,,,
!建立模型
K,1,,,,
K,2,3,,,
KGEN,2,1,2
,1
,
,.05,
,
,0
KGEN,2,1,2
,1
,
,0.5,
,
,0
A,1,2,4,3
A,3,4,6,5
VEXT,1,2
,1
,0,0,.2,,,,
VSEL,
,
,
,
1
VATT,
1,
2,
1,
0
VSEL,
,
,
,
2
VATT,
1,
1,
1,
0
LSEL,
all
LESIZE,all,.2,
,
,
,
,
,
,1
VSEL,
all
VMESH,all
/SOLU
ANTYPE,0
!力二范数收敛，2%
CNVTOL,F,
,0.02,2,
,
!加约束
D,3,
,
,
,
,
,UY,
,
,
,
,
D,35,
,
,
,
,
,UY,
,
,
,
,
D,16,
,
,
,
,
,UY,
,
,
,
,
D,48,
,
,
,
,
,UY,
,
,
,
,
D,35,
,
,
,
,
,ALL,
,
,
,
,
D,48,
,
,
,
,
,UZ,
,
,
,
,
!加竖向位移荷载
D,75,
,-0.01,
,
,
,UY,
,
,
,
,
D,123,
,-0.01,
,
,
,UY,
,
,
,
,
!加载最少分为20步
NSUBST,20,1000000,20
!输出每步结果
OUTRES,ALL,1
!每步至少迭代25次
CUTCONTROL,NOITERPRED,1
SOLVE

Answer 3

可以用solid65单元建立钢筋混凝土的整体式模型，此时要分别定义混凝土和钢筋的实常数，给一个例子如下：/prep7
et,1,solid65
keyopt,1,7,1
mp,ex,1,3.15e10
mp,prxy,1,0.3tb,concr,1
tbdata,0.3,0.5,2.8,-1
mp,ex,2,2.1e11
mp,prxy,2,0.33
r,1,1,0.00001,0,0,0.00001
rmore,0,90,0,0,0,0,0
r,2,2,0.0585,0,0,2,0.0585
或者可以用solid65+link8，认为混凝土和钢筋粘结很好，如要考虑粘结和滑移，则可引入弹簧单元进行模拟，比较困难！