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Fire-induced damage in tunnels: Thermo-mechanical modeling incorporating support system and geological conditions by John Healy; Kamelia Atefi-Monfared is a Engineering article available to read on EtoBox.

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The thermo-mechanical response of underground tunnels to fire loads is governed by interactions between the tunnel structure and the surrounding geological formation. Accordingly, for accurate prediction of damages in the tunnel structure subsequent to a fire event, it is critical to incorporate the state of the support system as well as in-situ conditions in the surrounding geology at the time of the fire event. Current tunnel-fire studies are mainly developed adopting beam-spring elements, thus disregarding the intricacies of the surrounding geological formation, its true constitutive behavior, as well as realistic tunnel-rock interactions. Another limitation in current tunnel-fire studies is assuming uniform temperature loads within the tunnel interface using time–temperature curves obtained from design codes, therefore ignoring the spatial nature of fire-induced temperatures along the tunnel interior. Temperature gradients can generate additional damage to the tunnel structure. This paper presents a comprehensive integrated numerical framework aimed to predict fire-induced damages in underground tunnels, incorporating four novel components: (i) detailed design of the tunnel sup

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Author

John Healy; Kamelia Atefi-Monfared

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)