On quantification of error and uncertainty in two-zone models used in fire safety design

Johan Lundin

Research output: Contribution to journalArticlepeer-review

15 Citations (SciVal)

Abstract

The error in smoke transport models have mainly been analyzed with qualitative approaches till date. The results make it difficult to perform a quantitative assessment of the model error in fire safety design applications. Even if a model has a substantial model error, it can be a very useful tool, as long as the designer is aware of the errors and the uncertainties in the predictions. This paper presents a methodology to quantify the error in model predictions and the associated uncertainties with a statistical analysis of multiple scenarios. The knowledge of the model error can then be used to adjust future model predictions in order to take the error into account explicitly. This is done with an adjustment model valid for predictions during the whole pre-flashover phase of the fire scenario and not just at a single point in time. The approach taken is based on a quantitative comparison of model predictions and experimental measurements from several fire scenarios which constitute a scenario configuration. The application of the method is presented in a subsequent paper, where the model error in temperature predictions by the two-zone model CFAST 2.0 is analyzed.
Original languageEnglish
Pages (from-to)329-354
JournalJournal of Fire Sciences
Volume23
Issue number4
DOIs
Publication statusPublished - 2005

Subject classification (UKÄ)

  • Building Technologies
  • Other Civil Engineering

Keywords

  • model
  • two-zone
  • CFAST
  • smoke transport model
  • model uncertainty
  • model error
  • fire safety design
  • modeling
  • temperature prediction

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