TY  - JOUR
AU  - Berchtold, Florian
AU  - Arnold, Lukas
AU  - Knaust, Christian
AU  - Thöns, Sebastian
TI  - Uncertainty Modelling in Metamodels for Fire Risk Analysis
JO  - Safety
VL  - 7
IS  - 3
SN  - 2313-576X
CY  - Basel
PB  - MDPI
M1  - FZJ-2021-02631
SP  - 50 -
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000701089200001
DO  - DOI:10.3390/safety7030050
UR  - https://juser.fz-juelich.de/record/893214
ER  -