Publication detail

# An Engineering Heat and Mass Transport Model Utilized for Concrete at Fire

MATUŠÍKOVÁ, A. ROZEHNALOVÁ, P. GIRGLE, F. KOSTIHA, V. ŠTĚPÁNEK, P.

Original Title

An Engineering Heat and Mass Transport Model Utilized for Concrete at Fire

English Title

An Engineering Heat and Mass Transport Model Utilized for Concrete at Fire

Type

journal article in Scopus

Language

en

Original Abstract

Mathematical models which can sufficiently describe processes proceeding in concrete during fire play an important role when assessing a load bearing capacity of concrete structures. In this paper a coupled heat and mass transport model based on principles of conservation of mass and energy is presented. A 2D computational solver using FEM was created to find three unknowns – a temperature, an amount of free water and a magnitude of pore pressure in concrete cross section during rapid heating. These variables, mutually connected through state equation, are necessary not only for determination the load bearing capacity of concrete element but also for prediction of concrete spalling. A parametric study of numerical results influenced by material properties of concrete (e.g. permeability, thermal conductivity) and initial conditions (e.g. relative humidity, temperature) is introduced and discussed in the end.

English abstract

Mathematical models which can sufficiently describe processes proceeding in concrete during fire play an important role when assessing a load bearing capacity of concrete structures. In this paper a coupled heat and mass transport model based on principles of conservation of mass and energy is presented. A 2D computational solver using FEM was created to find three unknowns – a temperature, an amount of free water and a magnitude of pore pressure in concrete cross section during rapid heating. These variables, mutually connected through state equation, are necessary not only for determination the load bearing capacity of concrete element but also for prediction of concrete spalling. A parametric study of numerical results influenced by material properties of concrete (e.g. permeability, thermal conductivity) and initial conditions (e.g. relative humidity, temperature) is introduced and discussed in the end.

Keywords

concrete, fire, pore pressure, free water, temperature, parametric study

Released

14.06.2017

Publisher

Trans Tech Publications

Location

Switzerland

Pages from

58

Pages to

68

Pages count

11

BibTex

``````
@article{BUT130594,
author="Anna {Matušíková} and Petra {Rozehnalová} and František {Girgle} and Vojtěch {Kostiha} and Petr {Štěpánek}",
title="An Engineering Heat and Mass Transport Model Utilized for Concrete at Fire",
annote="Mathematical models which can sufficiently describe processes proceeding in concrete
during fire play an important role when assessing a load bearing capacity of concrete structures. In
this paper a coupled heat and mass transport model based on principles of conservation of mass and
energy is presented. A 2D computational solver using FEM was created to find three unknowns –
a temperature, an amount of free water and a magnitude of pore pressure in concrete cross section
during rapid heating. These variables, mutually connected through state equation, are necessary not
only for determination the load bearing capacity of concrete element but also for prediction of
concrete spalling. A parametric study of numerical results influenced by material properties of
concrete (e.g. permeability, thermal conductivity) and initial conditions (e.g. relative humidity,
temperature) is introduced and discussed in the end.",