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ConcreteD

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This command is used to construct a concrete material based on the Chinese design code.

uniaxialMaterial ConcreteD $matTag $fc $epsc $ft $epst $Ec $alphac $alphat <$cesp> <$etap>

$matTag integer tag identifying material
$fc concrete compressive strength *
$epsc concrete strain at corresponding to compressive strength*
$ft concrete tensile strength *
$epst concrete strain at corresponding to tensile strength*
$Ec concrete initial Elastic modulus*
$alphac compressive descending parameter*
$alphat tensile descending parameter*
$cesp plastic parameter, recommended values: 0.2~0.3*
$etap plastic parameter, recommended values: 1.0~1.3*

NOTES:

  • Concrete compressive strength and the corresponding strain should be input as

negative values.

  • The value $fc/$epsc and $ft/$epst should be smaller than $Ec.
  • The default value for $cesp and $etap are 0.25 and 1.15, respectively.

EXAMPLE:

Example 1: Simulation of compressive test in Karson and Jirsa (1969).

uniaxialMaterial ConcreteD 1 -27.6 -0.002 3 0.0001 35000 1.0 0.1 0.25 1.15


REFERENCES:

  • Karsan, I. D., and Jirsa, J. O. (1969). “Behavior of concrete under compressive loadings.” Journal of the Structural Division, 95(12), 2535-2563.
  • Ministry of Housing and Urban-Rural Development of the People’s Republic of China. (2010). “Code for design of concrete structures.” GB50010-2010, Beijing, China.
  • Ren, X. D. (2010). Multi-scale based stochastic damage constitutive theory for concrete. Doctoral dissertation, Tongji University, Shanghai. (in Chinese)
  • Wu, J. Y., Li, J., and Faria, R. (2006). “An energy release rate-based plastic-damage model for concrete.” International Journal of Solids and Structures, 43(3), 583-612.
  • Zeng, S. J. (2012). Dynamic Experimental Research and Stochastic Damage Constitutive Model for Concrete. Doctoral dissertation, Tongji University, Shanghai. (in Chinese)

Code Developed By:

Zengyong Wan, Decheng Feng, Xiaodan Ren, Jie Li, College of Civil Engineering, Tongji University,

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