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Uncertainties in modelling heat transfer in fire resistance tests : A case study of stone wool sandwich panels

Livkiss, K. LU ; Andrés Valiente, Blanca LU ; Johansson, N. LU and van Hees, P. LU (2017) In Fire and Materials
Abstract

Modelling fire performance of building fire barriers would allow optimising the design solutions before performing costly fire resistance tests and promote performance-based fire safety engineering. Numerical heat conduction analysis is widely used for predicting the insulation capability of fire barriers. Heat conduction analysis uses material properties and boundary condition parameters as the input. The uncertainties in these input parameters result in a wide range of possible model outcomes. In this study, the output sensitivity of a heat conduction model to the uncertainties in the input parameters was investigated. The methodology was applied to stone wool core sandwich panels subjected to the ISO 834 standard fire resistance... (More)

Modelling fire performance of building fire barriers would allow optimising the design solutions before performing costly fire resistance tests and promote performance-based fire safety engineering. Numerical heat conduction analysis is widely used for predicting the insulation capability of fire barriers. Heat conduction analysis uses material properties and boundary condition parameters as the input. The uncertainties in these input parameters result in a wide range of possible model outcomes. In this study, the output sensitivity of a heat conduction model to the uncertainties in the input parameters was investigated. The methodology was applied to stone wool core sandwich panels subjected to the ISO 834 standard fire resistance temperature/time curve. Realistic input parameter value distributions were applied based on material property measurements at site and data available in literature. A Monte Carlo approach and a functional analysis were used to analyse the results. Overall, the model is more sensitive to the boundary conditions than to the material thermal properties. Nevertheless, thermal conductivity can be identified as the most important individual input parameter.

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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Fire resistance, Heat conduction, ISO 834, Sandwich panels, Sensitivity study, Stone wool
in
Fire and Materials
publisher
John Wiley & Sons
external identifiers
  • scopus:85012108400
ISSN
0308-0501
DOI
10.1002/fam.2419
language
English
LU publication?
yes
id
dab9db86-89cf-4b25-8b58-f19705d61242
date added to LUP
2017-02-23 11:48:53
date last changed
2017-02-23 11:48:53
@article{dab9db86-89cf-4b25-8b58-f19705d61242,
  abstract     = {<p>Modelling fire performance of building fire barriers would allow optimising the design solutions before performing costly fire resistance tests and promote performance-based fire safety engineering. Numerical heat conduction analysis is widely used for predicting the insulation capability of fire barriers. Heat conduction analysis uses material properties and boundary condition parameters as the input. The uncertainties in these input parameters result in a wide range of possible model outcomes. In this study, the output sensitivity of a heat conduction model to the uncertainties in the input parameters was investigated. The methodology was applied to stone wool core sandwich panels subjected to the ISO 834 standard fire resistance temperature/time curve. Realistic input parameter value distributions were applied based on material property measurements at site and data available in literature. A Monte Carlo approach and a functional analysis were used to analyse the results. Overall, the model is more sensitive to the boundary conditions than to the material thermal properties. Nevertheless, thermal conductivity can be identified as the most important individual input parameter.</p>},
  author       = {Livkiss, K. and Andrés Valiente, Blanca and Johansson, N. and van Hees, P.},
  issn         = {0308-0501},
  keyword      = {Fire resistance,Heat conduction,ISO 834,Sandwich panels,Sensitivity study,Stone wool},
  language     = {eng},
  month        = {02},
  publisher    = {John Wiley & Sons},
  series       = {Fire and Materials},
  title        = {Uncertainties in modelling heat transfer in fire resistance tests : A case study of stone wool sandwich panels},
  url          = {http://dx.doi.org/10.1002/fam.2419},
  year         = {2017},
}