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Limit-Based Fire Hazard Model for Evaluating Tunnel Life Safety
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Fire Research, Branddynamik.ORCID iD: 0000-0001-8548-657x
Ecole des mines d’Ales, France.
Ecole des mines d’Ales, France.
2015 (English)In: Fire technology, ISSN 0015-2684, E-ISSN 1572-8099, Vol. 51, no 3, p. 585-614Article in journal (Refereed) Published
Abstract [en]

Despite the simple one-dimensional symmetry of a tunnel with a longitudinal ventilation flow, risk analysis often comprises resource intensive and complex calculations. The purpose of this article is to present a simple yet precise limit-based model for assessing the possibility for a safe tunnel evacuation. To estimate the model uncertainty, fire dynamics calculations were compared to experimental data. The calculations performed well compared to experimental test data, showing an average difference between 5 and 40% in predicting the time available for evacuation, when criteria for visibility, air temperature, CO, CO2 and O2 concentration and heat flux were calculated. For steadily growing fires, visibility showed a low sensitivity to variability in input parameters with a relative difference at 9% compared to experimental data. Due to several factors it was not possible to estimate the accuracy of HCN calculations. Visualizing the hazards in a time–distance diagram revealed visibility to be the key indicator for calculating ASET for a broad set of plausible input parameters. This resulted in a simple expression for calculating ASET and consequently a simple condition for evaluating life safety.

Place, publisher, year, edition, pages
2015. Vol. 51, no 3, p. 585-614
Keywords [en]
Tunnel fire safety, Fire dynamics, Fire hazards, Evacuation, Risk analysis, ASET/RSET
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-6770DOI: 10.1007/s10694-014-0406-5Local ID: 19124OAI: oai:DiVA.org:ri-6770DiVA, id: diva2:964610
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-07-05Bibliographically approved

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Gehandler, Jonatan

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