Coupled FEM model for concrete exposed to fire loading

Title: Coupled FEM model for concrete exposed to fire loading
Author(s): J. Surovec, P. Kabele, J. Cervenka
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 95 - 102
Total Pages: 8
Nb references: 7
Language: English

Abstract: A phenomenological material model with ability to describe a behavior of various concrete types during extensive fire load is presented.
Our objective was to propose a model sufficiently accurate, yet simple to be easily applicable in wide engineering practice. The state variables are temperature and water vapor density. The presence of liquid water is considered, however, its direct transport is neglected.
The liquid water is used only as a container for evaporation or condensation.
In the proposed model the evaporation is governed by the phase equilibrium function. The assumption that evaporation does not occur instantaneously, leads to the application of the evaporation function, which determines the evaporation rate dependency on the pore pressure and temperature.
Since the model accounts for variable permeability of concrete, which is one of the main factors influencing the humidity transport, it makes it possible to model special types of concretes such as polymeric fiber concrete.

Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00

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