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Article

Uncertainty Modelling in Metamodels for Fire Risk Analysis

1
Federal Insitute for Materials Research and Testing, Unter den Eichen 87/88, 12205 Berlin, Germany
2
Institute for Advanced Simulation, Forschungszentrum Jülich, Wilhelm-Johnen-Straße, 52425 Jülich, Germany
3
Computational Civil Engineering, University of Wuppertal, 42285 Wuppertal, Germany
4
Division of Structural Engineering, Lund University, 221 00 Lund, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Tom Brijs
Received: 1 April 2021 / Revised: 3 June 2021 / Accepted: 16 June 2021 / Published: 23 June 2021
In risk-related research of fire safety engineering, metamodels are often applied to approximate the results of complex fire and evacuation simulations. This approximation may cause epistemic uncertainties, and the inherent uncertainties of evacuation simulations may lead to aleatory uncertainties. However, neither the epistemic ‘metamodel uncertainty’ nor the aleatory ‘inherent uncertainty’ have been included in the results of the metamodels for fire safety engineering. For this reason, this paper presents a metamodel that includes metamodel uncertainty and inherent uncertainty in the results of a risk analysis. This metamodel is based on moving least squares; the metamodel uncertainty is derived from the prediction interval. The inherent uncertainty is modelled with an original approach, directly using all replications of evacuation scenarios without the assumption of a specific probability distribution. This generic metamodel was applied on a case study risk analysis of a road tunnel and showed high accuracy. It was found that metamodel uncertainty and inherent uncertainty have clear effects on the results of the risk analysis, which makes their consideration important. View Full-Text
Keywords: metamodel; surrogate; uncertainty; risk; fire; evacuation metamodel; surrogate; uncertainty; risk; fire; evacuation
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MDPI and ACS Style

Berchtold, F.; Arnold, L.; Knaust, C.; Thöns, S. Uncertainty Modelling in Metamodels for Fire Risk Analysis. Safety 2021, 7, 50. https://0-doi-org.brum.beds.ac.uk/10.3390/safety7030050

AMA Style

Berchtold F, Arnold L, Knaust C, Thöns S. Uncertainty Modelling in Metamodels for Fire Risk Analysis. Safety. 2021; 7(3):50. https://0-doi-org.brum.beds.ac.uk/10.3390/safety7030050

Chicago/Turabian Style

Berchtold, Florian, Lukas Arnold, Christian Knaust, and Sebastian Thöns. 2021. "Uncertainty Modelling in Metamodels for Fire Risk Analysis" Safety 7, no. 3: 50. https://0-doi-org.brum.beds.ac.uk/10.3390/safety7030050

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