Simplified modelling of the performance of concrete tunnels during fire and post-fire damage classification

Authors

  • Ruben Van Coile Ghent University, Department of Structural Engineering and Building Materials, Technologiepark-Zwijnaarde 60, 9052 Gent, Belgium
  • Balša Jovanović Ghent University, Department of Structural Engineering and Building Materials, Technologiepark-Zwijnaarde 60, 9052 Gent, Belgium
  • Ranjit Kumar Chaudhary Ghent University, Department of Structural Engineering and Building Materials, Technologiepark-Zwijnaarde 60, 9052 Gent, Belgium
  • Xavier Deckers Fire Engineered Solutions Ghent - A Jensen Hughes Company, Oudenaardsesteenweg 32 G, 9000 Ghent, Belgium
  • Andrea Lucherini Ghent University, Department of Structural Engineering and Building Materials, Technologiepark-Zwijnaarde 60, 9052 Gent, Belgium

DOI:

https://doi.org/10.14311/APP.2022.36.0253

Keywords:

damage, failure probability, fire, spalling, tunnel

Abstract

The performance of concrete tunnel structures during and after fire is not well understood. This is an obstacle to the adoption of risk-based approaches for fire safety design of tunnel structures. Upon the request of the Belgian fire safety consultancy FESG, a simplified assessment of the collapse probability and post-fire damages for a reference tunnel structure has been made. The structural system is modelled through 2D beam finite elements, where spalling rates have been assumed based on available literature data. Structural stability is verified for both the heating and cooling phases of the fire. In those cases where the structure survives up to burnout, the residual deformations and thermal damage to the tunnel structure are assessed.

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Published

2022-08-18