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Timber under Real Fire Conditions: the influence of oxygen content and gas velocity on the charring behavior
Institute of Structural Engineering, ETH Zurich.
RISE, Research Institute of Sweden.
Commissario delegato per l’emergenza della mobilità riguardante l’A4, Trieste.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
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2017 (English)In: Journal of Structural Fire Engineering, ISSN 2040-2317, E-ISSN 2040-2325Article in journal (Refereed) Epub ahead of print
Abstract [en]

Purpose

The purpose of this study is to investigate the influencing factors on the charring behaviour of timber, the char layer and the charring depth in non-standard fires.

Design/methodology/approach

This paper summarizes outcomes of tests, investigating the influences on the charring behavior of timber by varying the oxygen content and the gas velocity in the compartment. Results show that charring is depending on the fire compartment temperature, but results show further that at higher oxygen flow, char contraction was observed affecting the protective function of the char layer.

Findings

In particular, in the cooling phase, char contraction should be considered which may have a significant impact on performance-based design using non-standard temperature fire curves where the complete fire history including the cooling phase has to be taken into account.

Originality/value

Up to now, some research on non-standard fire exposed timber member has been performed, mainly based on standard fire resistance tests where boundary conditions as gas flow and oxygen content especially in the decay phase are not measured or documented. The approach presented in this paper is the first documented fire tests with timber documenting the data required.

Place, publisher, year, edition, pages
Emerald Group Publishing Limited, 2017.
National Category
Building Technologies
Research subject
Steel Structures
Identifiers
URN: urn:nbn:se:ltu:diva-65742DOI: 10.1108/JSFE-01-2017-0013ISBN: 978-1-60595-320-5 (print)OAI: oai:DiVA.org:ltu-65742DiVA: diva2:1142783
Available from: 2017-09-20 Created: 2017-09-20 Last updated: 2017-11-24

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CiteExportLink to record
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Citation style
  • apa
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  • de-DE
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  • en-US
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  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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