Structural Analysis of the Fire Response of a Cut and Cover Tunnel
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Bibliographic Details
| Author(s): |
Juan Pagan-Martinez
(ICITECH, Universitat Politècnica de València, Valencia, Spain)
Ignacio Payá-Zaforteza 
(ICITECH, Universitat Politècnica de València, Valencia, Spain)
Antonio Hospitaler (ICITECH, Universitat Politècnica de València, Valencia, Spain) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Tomorrow’s Megastructures, Nantes, France, 19-21 September 2018 | ||||
| Published in: | IABSE Symposium Nantes 2018 | ||||
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| Page(s): | S9-27 | ||||
| Total no. of pages: | 8 | ||||
| DOI: | 10.2749/nantes.2018.s9-27 | ||||
| Abstract: |
This paper analyses the fire response of a 500 m long cut-and-cover tunnel with a rectangular cross section. The tunnel is submitted to the combustion of a truck carrying dangerous goods inside. The analysis uses a performance approach with three basic components: a model of the fire event using Computational Fluid Dynamics, a heat transfer analysis to obtain the temperatures within the structure of the worst tunnel cross section and a simplified model to obtain the tunnel structural response via the isotherm 500° method. Results show that the tunnel top slab is the critical element and that it would collapse 30 minutes after the beginning of the fire. Therefore, the tunnel would require special protective measures. The analysis also shows the advantages of a performance based approach vis-à-vis a prescriptive approach. |
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| Keywords: |
Computational Fluid Dynamics fire engineering reinforced concrete thermo-structural analysis Cut and Cover Tunnel Rectangular Cross Section Tunnel
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