Effect of Hydrocarbon Fire on Composite Concrete Bridge Deck

The effect of fire on concrete bridges is one of the least investigated hazard types. To bridge this 2 knowledge gap, a full scale prestressed concrete bridge was tested under a combined hydrocarbon 3 fire and simulated AASHTO live load. It was found that the girder-deck interface was not impacted 4 by the low temperatures at those locations. The precast deck panels sustained significant concrete 5 spalling on fire exposed side, and much higher than that in the cast- in-place deck overhangs, since 6 the former was made of high strength concrete and the latter of normal strength concrete. The fire 7 caused spalling of the entire precast deck panel at some locations, resulting in 78% reduction in 8 their nominal flexural capacity and a 700% increase in instantaneous deflections due to section 9 and stiffness losses, respectively. Despite severe spalling on the bottom, the cast in place deck at 10 top showed no signs of crack.

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; References; Tables;
  • Pagination: 22p

Subject/Index Terms

Filing Info

  • Accession Number: 01763593
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-00318
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:06AM