Post-Fire Strength Assessment of Steel Bridges Based on Residual Out-of-Plane Web Deformations

Bridges that have been damaged (but have not collapsed) due to a fire pose a problem for engineers tasked with determining whether a damaged bridge may be re-opened for full or partial traffic, or must be demolished and rebuilt. Depending on the significance of the bridge, this decision carries heavy economic costs due to both the price of building a new bridge and the impact of an out-of-commission bridge may have on regional mobility. Steel plate girder bridges are particularly susceptible to damage during a fire event. Web shear buckling at elevated temperatures has been observed in some cases. The work presented in this paper focuses on the residual post-fire shear buckling strength of steel webs that have reached their ultimate buckling load due to these fire temperatures. This initial study has found that, for most span-to-depth ratios considered, the web still retains a considerable amount of the postbuckling shear strength capacity that it had before the fire event occurred.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 335-344
  • Monograph Title: Structures Congress 2014

Subject/Index Terms

Filing Info

  • Accession Number: 01522529
  • Record Type: Publication
  • ISBN: 9780784413357
  • Files: TRIS, ASCE
  • Created Date: Apr 9 2014 3:01PM