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Reliability of timber elements exposed to fire
RISE, SP – Sveriges Tekniska Forskningsinstitut.ORCID iD: 0000-0002-4551-1045
RISE, SP – Sveriges Tekniska Forskningsinstitut.
ETH Zurich, Switzerland.
2016 (English)In: WCTE 2016: World Conference on Timber Engineering, 2016, p. 3874-3883Conference paper, Published paper (Refereed)
Abstract [en]

This paper discusses the principles of performance based structural design and motivates the need for probabilistic assessment of the response of structures and an assessment of the consequences of failure. Using the results from a series of tests carried out at SP in Sweden, we extrapolate data required for the assessment of timber structures under a range of parametric fires. This data also includes information required to develop probabilistic models of the response of timber elements under different parametric fires. Using methodologies from the literature, we then carry out a reliability analysis of timber structures, considering uncertainties the timberresponse to fire. This is carried out using the first order reliability method. We show that the opening factor has an influence on the reliability of timber structures, as a result of the rate of heating in a parametric fire exposure. A minimum reliability, evolving over time, is seen to occur at an opening factor of 0.14m1/2. Finally, we propose a modification to the Eurocode target reliability indices that allows these to be used as a target reliability index for structures exposed to fire. The proposed modification is dependent on the floor area and the method is exemplified here for a range of floor areas and its application to timber structures is illustrated.

Place, publisher, year, edition, pages
2016. p. 3874-3883
Keywords [en]
Form, Parametric fire exposure, Reliability, Target reliability
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-28355Scopus ID: 2-s2.0-85010960625ISBN: 978-3-903024-35-9 (print)OAI: oai:DiVA.org:ri-28355DiVA, id: diva2:1079135
Conference
World Conference on timber engineering (WCTE 2016), August 22-25, 2016, Vienna, Austria
Available from: 2017-03-07 Created: 2017-03-07 Last updated: 2019-08-15Bibliographically approved

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Scopushttp://repositum.tuwien.ac.at/obvutwoa/content/pageview/1558850

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Lange, David

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