Use SOLID65 3D reinforced concrete solid element which is used to model Concrete with or without reinforcement in ANSYS.

Here is the link for detail,

http://www.ansys.stuba.sk/html/elem_55/chapter4/ES4-65.htm

Thank you sir, I tried with solid65 element but it has convergence problem, I used following command micro assigning solid 65

ET,MATID,SOLID65

R,MATID,0,0,0,0,0,0

RMORE,0,0,0,0,0

MP,EX,MATID,29250

MP,PRXY,MATID,0.2

MPTEMP,MATID,0

TB,CONCR,MATID,1,9

TBTEMP,22

TBDATA,1,0.3,0.8,1.5,25

TB,MISO,MATID,1,35,0

TBTEMP,22

TBPT,,0.0001,2.925

TBPT,,0.0002,5.7

TBPT,,0.0003,8.325

TBPT,,0.0004,10.8

TBPT,,0.0005,13.125

TBPT,,0.0006,15.3

TBPT,,0.0007,17.325

TBPT,,0.0008,19.2

TBPT,,0.0009,20.925

TBPT,,0.001,22.5

TBPT,,0.0011,23.925

TBPT,,0.0012,25.2

TBPT,,0.0013,26.325

TBPT,,0.0014,27.3

TBPT,,0.0015,28.125

TBPT,,0.0016,28.8

TBPT,,0.0017,29.325

TBPT,,0.0018,29.7

TBPT,,0.0019,29.925

TBPT,,0.002,30

TBPT,,0.0021,30

TBPT,,0.0022,30

TBPT,,0.0023,30

TBPT,,0.0024,30

TBPT,,0.0025,30

TBPT,,0.0026,30

TBPT,,0.0027,30

TBPT,,0.0028,30

TBPT,,0.0029,30

TBPT,,0.003,30

TBPT,,0.0031,30

TBPT,,0.0032,30

TBPT,,0.0033,30

TBPT,,0.0034,30

TBPT,,0.0035,30

but it shows an error 

*** ERROR ***

Duplicate temperature values were found. The MPTEMP command is

ignored.

please help me to come out of this error and suggest a common micro used to define SOLID65 material in ANSYS workbench.

Change the KEYOPT of the SOLID65 element. While defining the stress-strain curve the initial value should define the elastic limit of concrete.

thank you sir , I have made changes as per your suggestion for keyopt but still it shows same error . As I am new in this reinforced concrete simulation,please help me to define element in this type of problems.I hereby attached problem definition for your reference, I have to use concrete in automotive arm body.

Thanks Zhaochun Yang , I tried with your as per your suggetion but it shows following error.

       The solver output file has exceeded the maximum size and will not be displayed here.

beside using SOLID65 (legacy element), you can use a micro-plane model with newer CPT element. The micro-plane model supports the current technology elements SOLID18x.

ET,MATID,SOLID185

OR

use linear element type in mesh control