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Comparison between the charring rate model and the conductive model of Eurocode 5
Author(s) -
Cachim Paulo B.,
Franssen JeanMarc
Publication year - 2008
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.985
Subject(s) - charring , eurocode , anisotropy , independence (probability theory) , structural engineering , composite material , environmental science , materials science , engineering , mathematics , statistics , physics , quantum mechanics
Abstract Eurocode 5, Part 1–2, presents several models for the calculation of fire resistance of timber structures. These models are based on the hypothesis that for temperatures above 300 ° C , wood is no longer able to sustain any stress, which makes the determination of the location of the 300 ° C isotherm decisive for the result provided by the models. In this paper, the charring rate model and the conductive model presented in Eurocode 5, Part 1–2 are compared regarding the determination of the location of the 300 ° C isotherm. The main wood parameters investigated are density, moisture content and anisotropy. The almost complete independence of the charring rate model from these parameters leads to some inconsistencies between the models. To reduce these inconsistencies some proposals to improve the conductive and the charring rate models are presented. Copyright © 2008 John Wiley & Sons, Ltd.