›› 2010, Vol. 31 ›› Issue (5): 1585-1591.

• Numerical Analysis • Previous Articles     Next Articles

A coupled chemoplastic-damage constitutive model for plain concrete subjected to high temperature

LI Rong-tao   

  1. Key Laboratory for Prediction & Control on Complicated Structure System of the Education Department of Liaoning Province, Dalian University, Dalian Liaoning, 116622, China
  • Received:2008-07-29 Online:2010-05-10 Published:2010-05-24

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Abstract:

A coupled chemoplastic-damage constitutive model for the simulation of coupled chemo-thermo-hygro-mechanical behavior of concretes at high temperature is proposed. A consistent return mapping algorithm for the integration of the rate coupled constitutive equations is developed. Consistent tangent modulus matrices for coupled chemo-thermo-hygro-mechanical analysis are derived to preserve the quadratic rate of convergence of the global Newton iterative procedure. Numerical results demonstrate that the proposed constitutive model in reproducing coupled chemo-thermo-hygro-mechanical behavior of concretes subjected to fire and thermal radiation is available and effective.

Key words: chemoplasticity, damage, coupled constitutive model, concrete, high temperature

CLC Number: 

  • TU 528
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