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Fire Performance and Post-fire Strength of Steel Plate Girder Bridges

Speaker: Jonathan Glassman, Graduate Student
Series: MMS Brown Bag Seminars
Location: Engineering Quad E219
Date/Time: Tuesday, October 8, 2013, 12:30 p.m. - 2:00 p.m.

Abstract:

Fire is not a loading event that is traditionally associated with highway bridges. Recent data, however, suggests that bridge fires pose a significant threat, with approximately three times as many bridge failures due to fire as opposed to earthquakes. Bridge design specifications related to fire are very limited, as are post-fire assessment schemes to determine if a fire-damaged bridge has enough strength to resume carrying traffic. Steel plate girder bridges are particularly vulnerable to fire damage and are thus the focus of my current research. I will present recent work that examines how the phenomenon of web shear buckling may influence bridge fire performance. Additionally, I will present our efforts to re-formulate the existing model for web shear buckling, currently based on tension field theory, to one that incorporates the role of compressive stresses in achieving post-buckling shear strength.

Source: http://media.trb.com/media/photo/2011-12/302055880-15105025.jpg
Source: http://media.trb.com/media/photo/2011-12/302055880-15105025.jpg