*CONCRETE

Define concrete properties beyond the elastic range.

Warning: Success in analyzing plain and reinforced concrete problems depends significantly on making sensible choices regarding the concrete material parameters described in this section as well as, in the case of reinforced concrete, the definition of rebar in the problem. It is important to be familiar with the issues relating to concrete modeling and rebar definition by referring to Concrete Smeared Cracking, Defining Rebar as an Element Property, and the appropriate sections in the Abaqus Theory Guide and the Abaqus Example Problems Guide.

The CONCRETE option is used to define the properties of plain concrete outside the elastic range in an Abaqus/Standard analysis. It must be used in conjunction with the TENSION STIFFENING option and may also appear with the SHEAR RETENTION and FAILURE RATIOS options. The properties and locations of reinforcement bars are given separately (Defining Rebar as an Element Property).

The BRITTLE CRACKING option is used to analyze concrete in an Abaqus/Explicit analysis (see Cracking Model for Concrete).

This page discusses:

Optional parameters

DEPENDENCIES

Set this parameter equal to the number of field variable dependencies included in the definition of the compressive yield stress, in addition to temperature. If this parameter is omitted, it is assumed that the compressive yield stress depends only on the plastic strain and, possibly, on temperature. See Material Data Definition for more information.

Data lines to define the concrete properties

First line

  1. Absolute value of compressive stress. (Units of FL−2.)

  2. Absolute value of plastic strain. The first stress-strain point given at each value of temperature and field variable must be at zero plastic strain and will define the initial yield point for that temperature and field variable.

  3. Temperature.

  4. First field variable.

  5. Second field variable.

  6. Etc., up to five field variables.

Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five)

  1. Sixth field variable.

  2. Etc., up to eight field variables per line.

Repeat this set of data lines as often as necessary to define the dependence of compressive yield stress on plastic strain and, if needed, on temperature and other predefined field variables.

 

See Also
Concrete Smeared Cracking
*TENSION STIFFENING
*SHEAR RETENTION
*FAILURE RATIOS