CONCRETE

Concrete Material Property Definition

Description: Defines material properties for use in fully nonlinear analysis of quasi-brittle materials (concrete).

Format:

Example:

Field	Definition	Type	Default
MID	Identification number of a MAT1 entry.	Integer > 0	Required
SINITT	Initial tensile strength.	Real > 0.0	See Remark 1
SINITC	Initial compressive strength.	Real > 0.0 and SMAXC > SINITC	See Remark 1
SMAXT	Maximum tensile strength.	Real > 0.0	See Remark 1
SMAXC	Maximum compressive strength.	Real > 0.0 and SMAXC > SINITC	See Remark 1
GT	Tensile crushing fracture energy.	Real > 0.0	See Remark 1
GC	Compressive crushing fracture energy.	Real > 0.0	See Remark 1
SBYC	Initial biaxial yield compressive stress.	Real ≥ 0.0 or blank	0.0
KDT	Uniaxial tensile elastic stiffness degradation factor.	Real > 0.0 or blank	0.5
KDC	Uniaxial compressive elastic stiffness degradation factor.	Real > 0.0 or blank	0.4
ALPHAP	Coefficient of plastic potential.	Real > 0.0 or blank	0.2
LT	Tensile characteristic length parameter.	Real > 0.0 or blank	See Remark 2
LC	Compressive characteristic length parameter.	Real > 0.0 or blank	See Remark 2

Remarks:

1. The following are values for fields 3 through 8 for standard concrete in metric units:

   Variable	Value
   SINITT	3.3E+6 Pa
   SINITC	3.0E+7 Pa
   SMAXT	3.3E+6 Pa
   SMAXC	3.5E+7 Pa
   GT	2.5E+2 N/m
   GC	2.5E+4 N/m

2. The default tensile and compressive characteristic length parameter values are based on the maximum element reference length in the model.