Modelling of hygro-thermal behaviour of concrete at high temperature with thermo-chemical and mechanical material degradation

D. Gawin, F. Pesavento, B. A. Schrefler

Research output: Contribution to journalArticle

222 Scopus citations

Abstract

A mathematical model for analysis of hygro-thermal behaviour of concrete as a multi-phase porous material at high temperatures, accounting for material deterioration, is presented. Full development of the model equations, starting from the macroscopic balances of mass, energy and linear momentum of single constituents is presented. Constitutive relationships for concrete at high temperature, including those concerning material damage, are discussed. The classical isotropic non-local damage theory is modified to take into account the mechanical- and the thermo-chemical concrete damage at high temperature. The final form of the governing equations, their discretised FE form, and their numerical solution are presented.The results of two numerical examples, concerning fire performance of 1-D and 2-D HPC structures, are discussed.

Original languageEnglish (US)
Pages (from-to)1731-1771
Number of pages41
JournalComputer Methods in Applied Mechanics and Engineering
Volume192
Issue number13-14
DOIs
StatePublished - Mar 28 2003

Keywords

  • Concrete
  • High temperature
  • Hygro-thermo-mechanical behaviour
  • Mechanical damage
  • Numerical model
  • Thermo-chemical damage

ASJC Scopus subject areas

  • Computer Science Applications
  • Computational Mechanics

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