Risk assessment of zero-flow ventilation strategy for fires in bidirectional tunnels with longitudinal ventilation

I. Nakahori, T. Sakaguchi, B. Kohl, C. Forster, A. Vardy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Two generically different methods are used to assess alternative strategies for responding to the outbreak of fire in a road tunnel. One approach, common in Japan, follows a deterministic process that leads to strong qualitative outcomes, namely either "safe" or "fatal", for any chosen specific scenario. The other approach, developed in Austria, is a probabilistic, system-based process that leads to quantitative outcomes for any specific tunnel and that provides a method of comparing overall safety in different tunnels. The two approaches are used to provide independent assessments of the merits of (i) an actively controlled zero-airflow response to the detection of fire and (ii) a simpler response in which all fans are immediately shut down and the airflows are determined by conditions at the tunnel. Both assessment methods show that the acfive response constitutes a significantly lower risk strategy than the simpler response.

Original languageEnglish
Title of host publicationBHR Group - 16th International Symposium on Aerodynamics, Ventilation and Fire in Tunnels 2015
PublisherBHR Group Limited
Pages501-516
Number of pages16
ISBN (Print)9781510813748
Publication statusPublished - 2015
Event16th International Symposium on Aerodynamics, Ventilation and Fire in Tunnels 2015, ISAVFT 2015 - Seattle, United States
Duration: 15 Sep 201517 Sep 2015

Conference

Conference16th International Symposium on Aerodynamics, Ventilation and Fire in Tunnels 2015, ISAVFT 2015
CountryUnited States
CitySeattle
Period15/09/1517/09/15

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  • Cite this

    Nakahori, I., Sakaguchi, T., Kohl, B., Forster, C., & Vardy, A. (2015). Risk assessment of zero-flow ventilation strategy for fires in bidirectional tunnels with longitudinal ventilation. In BHR Group - 16th International Symposium on Aerodynamics, Ventilation and Fire in Tunnels 2015 (pp. 501-516). BHR Group Limited.