Structures Congress 2018
Recommendations for Improving Fire Performance of Steel Bridge Girders
Publication: Structures Congress 2018: Bridges, Transportation Structures, and Nonbuilding Structures
ABSTRACT
Infrastructure risk due to fire has been well documented. In particular, bridges in the urban environment are susceptible due to low overhead clearances on overpasses, existing simple spans with no redundancy, narrow lane widths, and general alignment congestion. Although the risk is significant, the current AASHTO Bridge Design Specification does not include provisions for design due to fire conditions. As such, this paper considers alternatives for improving the fire resistance of steel bridges using both traditional and non-traditional fire protection methods. In this paper, a total of eight parameters are investigated: (1) global section factor (W/D ratio) of bridge girder cross-section; (2) thickness of the flange; (3) thickness of the web; (4) steel material specification; (5) concrete slab width; (6) concrete slab thickness; (7) thickness of intumescent paint; and (8) thickness of SFRM. It is shown that the temperature domain performance can be significantly increased by (1), (3), (7), and (8) while the other parameters are less effective. The recommendations from this research can be readily implemented in both bridge design and retrofit scenarios.
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ACKNOWLEDGEMENTS
The research presented in this paper was supported by the University Transportation Research Center (UTRC) through Grant #49198-19-28.
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Published In
Structures Congress 2018: Bridges, Transportation Structures, and Nonbuilding Structures
Pages: 48 - 64
Editor: James Gregory Soules, CB&I
ISBN (Online): 978-0-7844-8133-2
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© 2018 American Society of Civil Engineers.
History
Published online: Apr 17, 2018
Published in print: Apr 17, 2018
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