Quantitative assessment of building fire risk to life safety
Autor: | Chu Guanquan, Sun Jin-hua |
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Rok vydání: | 2008 |
Předmět: |
Risk analysis
Event tree Risk Engineering Stochastic Processes Models Statistical Operations research Stochastic process business.industry Poison control Models Theoretical Risk Assessment Fires Physiology (medical) Facility Design and Construction Fire protection Forensic engineering Range (statistics) Probability distribution Humans Safety Risk Reliability and Quality business Risk assessment Burns Probability |
Zdroj: | Risk analysis : an official publication of the Society for Risk Analysis. 28(3) |
ISSN: | 1539-6924 |
Popis: | This article presents a quantitative risk assessment framework for evaluating fire risk to life safety. Fire risk is divided into two parts: probability and corresponding consequence of every fire scenario. The time-dependent event tree technique is used to analyze probable fire scenarios based on the effect of fire protection systems on fire spread and smoke movement. To obtain the variation of occurrence probability with time, Markov chain is combined with a time-dependent event tree for stochastic analysis on the occurrence probability of fire scenarios. To obtain consequences of every fire scenario, some uncertainties are considered in the risk analysis process. When calculating the onset time to untenable conditions, a range of fires are designed based on different fire growth rates, after which uncertainty of onset time to untenable conditions can be characterized by probability distribution. When calculating occupant evacuation time, occupant premovement time is considered as a probability distribution. Consequences of a fire scenario can be evaluated according to probability distribution of evacuation time and onset time of untenable conditions. Then, fire risk to life safety can be evaluated based on occurrence probability and consequences of every fire scenario. To express the risk assessment method in detail, a commercial building is presented as a case study. A discussion compares the assessment result of the case study with fire statistics. |
Databáze: | OpenAIRE |
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