Structural Condition Assessment and Service Load Performance of Deteriorated Pretensioned Deck Beam Bridges

Three 30-year old deteriorated pretensioned deck beams were removed from an existing bridge in Illinois and re-assembled in the laboratory into a bridge sub-assemblage. Non-destructive and destructive tests and evaluation of three beams were made in three phases: (1) detailed visual condition assessments of the as-delivered beams; (2) the service load performance under truck type loadings of a bridge sub-assemblage constructed with the three beams; and (3) the strength and ductility of the individual beams in tests to failure. Detailed descriptions are provided of the results of each study, of deterioration assessments made by two independent contractors, of coupon tests on prestressing steel and concrete samples taken from the beams, and of the chloride profiles measured through the soffit and sides of the samples taken from the beams. Theoretical aspects of the response of deck beam bridges, including the modeling of the response of the sub-assemblage were studied. A method based on the beam on elastic foundation theory was developed to replicate the effects of changing the stiffness of the longitudinal joint between beams. Using that procedure bending moments in individual beams along and across the width of a bridge, inter girder shear forces, and beam deflections were calculated and deflections compare with those measured experimentally on the sub-assemblage. With that method appropriate load distribution factors for deteriorated existing deck beam bridges can be calculated. The condition of the transverse tie rod was found to be critical to service load performance. Cracking of the longitudinal joint had little effect on the stiffness of a bridge provided the transverse tie rod was snug. However, loss of snugness with time or corrosion increased substantially the potential for overloading a deteriorated beam.

  • Record URL:
  • Corporate Authors:

    University of Illinois, Urbana-Champaign

    Department of Civil and Environmental Engineering
    205 North Mathews Avenue
    Urbana, IL  United States  61801-2352

    Illinois Department of Transportation

    Bureau of Materials and Physical Research
    126 East Ash Street
    Springfield, IL  United States  62704-4766

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Hawkins, Neil M
    • Fuentes, Juan B
  • Publication Date: 2003-5


  • English

Media Info

  • Media Type: Web
  • Edition: Project Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 437p

Subject/Index Terms

Filing Info

  • Accession Number: 01108746
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-IL-UI-285, UILU-ENG-2003-2004
  • Contract Numbers: IHR-25
  • Created Date: Aug 11 2008 11:31AM