Structural Fire Safety of Circular Concrete Railroad Tunnel Linings
Publication: Journal of Structural Engineering
Volume 135, Issue 9
Abstract
In many tunnel designs, lining cross section is selected based on construction requirements rather than design loads. A constant cross section is typically used along a tunnel especially for tunnels constructed by tunnel boring machines (TBMs). Factor of safety against failure is typically high at shallow depth regions of alignment. Minor repairable damage is targeted at rare events such as earthquakes, train derailments, explosions, and long-duration fires, and a reduction to service load factor of safety is applied in these types of events. The focus of this paper is to analytically investigate structural fire safety of circular tunnel linings in terms of reduction in service load safety due to time- and temperature-dependent material degradation and increase in load demand in a tunnel fire, and to develop recommendations for preliminary assessment of structural fire endurance of circular tunnel linings. Analytical methods accounting for thermal nonlinearity, material degradation, tunnel lining-ground interaction, and fire time stages are available to assess the structural fire safety of the concrete tunnel linings. Results of hydrocarbon fire tests of tunnel segments can be estimated by available analytical methods. TBM tunnels at soft soil can have a better fire performance compared to the ones located at stiff conditions with similar initial loading.
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Acknowledgments
The writers thank William Barclay Fellowship–Parsons Brinckerhoff for their support in development of fire safety evaluation for concrete tunnel linings. They also want to extend their appreciations to Dr. Cahit Eralp, Dr. Kahraman Albayrak, Dr. Cemil Yamalı, Dr. İsmail Ozgur Yaman, and Dr. Serkan Kayılı of Middle East Technical University, and to Barbaros Sarici of Rua Engineering for their help in fire safety evaluation of Tunnels in Turkey.
References
American Concrete Institute (ACI). (2001). “Fire endurance of concrete elements.” ACI 2003 manual of concrete practice, ACI216R–89, Farmington Hills, Mich.
American Concrete Institute (ACI). (2005). “Building code requirements for structural concrete.” ACI318, Farmington Hills, Mich.
ASCE/SEI/SFPE 29–99. (2003). Standard calculation methods for structural fire protection, Reston, Va.
Beard, A., and Carvel, R. (2005). The handbook of tunnel fire safety, Thomas Telford, London.
Bickel, J. O., Kuesel, T. R., and King, E. H. (1997). Tunnel engineering handbook, 2nd Ed., Chapman and Hall, New York.
Both, C., Wolinsk, G. M., and Breunese, A. J. (2003). “Spalling of concrete tunnel linings in fire.” (Re)claiming the underground space, Sauver, Swets & Zeitlinger, Lisse, The Netherlands, 227–231.
British Tunnelling Society (BTC). (2004). Tunnel lining design guide, Thomas Telford, London.
Caner, A., Zlatanic, S., and Munfah, N. (2005). “Structural fire performance of concrete and shotcrete tunnel liners.” J. Struct. Eng., 131(12), 1920–1925.
Flynn, D. R. (1999). “Response of high performance concrete to fire conditions: review of thermal property data and measurement techniques.” Rep. No. NIST GCR 99–767, U.S. Dept. of Commerce Building and Fire Research Laboratory, NIST, Gaithersburg, Md.
Khoury, G. A. (2002). “Passive protection against fire.” Tunnels Tunnel. Int., 34(11), 40–42.
Kodur, V. K. R., and Sultan, M. A. (2003). “Effect of temperature on thermal properties of high strength concrete.” J. Mater. Civ. Eng., 15(2), 101–107.
Kutznig, L. (1999). “Fire resistance of high performance concrete with fiber cocktails.” LACER, 4, 185–192, ⟨http://aspin.wifa.uni_leipzig.de/institut/lacer/lacer04/104_19.pdf⟩ (June 23, 2009).
Martinola, G., Bauml, M. F., and Walliser, A. (2007). “Numerical modeling of the long-term behavior of passive fire protection mortars applied on concrete tunnels.” J. Mater. Civ. Eng., 19(6), 484–491.
Pichler, C., Lackner, R., and Mang, H. A. (2006). “Safety assessment of concrete tunnel linings under fire load.” J. Struct. Eng., 132(6), 961–969.
Rignerth, J. (2000). “Simplified design of fire exposed concrete beams and columns—An evaluation of Eurocode and Swedish building code against advanced computer models.” Rep. Prepared for the Dept. of Fire Safety Engineering, Lund Univ., Sweden.
Rombach, G. A. (2004). Finite element design of concrete structures, Thomas Telford, London.
Tatnall, P. C. (2002). “Shotcrete in fires: Effects of fibers on explosive spalling.” Shotcrete, American Shotcrete Association, Farmington Hills, Mich., 10–12, ⟨www.shotcrete.org⟩ (June 23, 2009).
Turkish Standards (TS). (2000). “Requirements for design and construction of reinforced concrete structures.” TS500, Bakanliklar, Ankara, Turkey.
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© 2009 ASCE.
History
Received: Mar 28, 2008
Accepted: Mar 23, 2009
Published online: Mar 26, 2009
Published in print: Sep 2009
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