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FIERCE : a cost benefit analysis for tunnel fire safety
The Belgian fire engineering consultancy FESG – A Jensen Hughes Company - has been developing a risk assessment framework for tunnels called FIERCE (Fire Integrated Environment for Risk Comprehension and Evaluation) in cooperation with Ghent University. The goal of the framework is to develop a probabilistic approach towards fire safety measures in tunnels taking into account specific fire safety measures (sprinklers, water mist systems, ventilation) but also structural and financial considerations. The framework couples, CFD, 1D and evacuation simulations in order to asses the impact of a tunnel fire in terms of potential casualties. In order to evaluate the structural damage and subsequent downtime a finite element model of a representative tunnel was built in ‘SAFIR’. This model was subjected to several fire curves, with a heating phase conforming to the RWS curve and an exponential decay phase. The evaluation of the damage and associated cost was done by mapping the depth of the 300 °C isotherm and residual deformations at the end of the decay phase to a damage state leading to an assessment matrix correlating the fire curve and the damage state. The damage state was subsequently linked to a repair cost as well as a cost associated with the unavailability of the tunnel.
FIERCE : a cost benefit analysis for tunnel fire safety
The Belgian fire engineering consultancy FESG – A Jensen Hughes Company - has been developing a risk assessment framework for tunnels called FIERCE (Fire Integrated Environment for Risk Comprehension and Evaluation) in cooperation with Ghent University. The goal of the framework is to develop a probabilistic approach towards fire safety measures in tunnels taking into account specific fire safety measures (sprinklers, water mist systems, ventilation) but also structural and financial considerations. The framework couples, CFD, 1D and evacuation simulations in order to asses the impact of a tunnel fire in terms of potential casualties. In order to evaluate the structural damage and subsequent downtime a finite element model of a representative tunnel was built in ‘SAFIR’. This model was subjected to several fire curves, with a heating phase conforming to the RWS curve and an exponential decay phase. The evaluation of the damage and associated cost was done by mapping the depth of the 300 °C isotherm and residual deformations at the end of the decay phase to a damage state leading to an assessment matrix correlating the fire curve and the damage state. The damage state was subsequently linked to a repair cost as well as a cost associated with the unavailability of the tunnel.
FIERCE : a cost benefit analysis for tunnel fire safety
Schepers, Melchior (author) / Deckers, Xavier (author) / Jovanović, Balša (author) / Chaudhary, Ranjit Kumar (author) / Van Coile, Ruben (author)
2022-01-01
11th Tunnel Safety and Ventilation 2022, Proceedings
Conference paper
Electronic Resource
English
DDC:
690
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