OVERLOAD BEHAVIOR OF 1/8TH SCALE THREE-SPAN CONTINUOUS PRESTRESSED CONCRETE BRIDGE GIRDERS

This report describes the results of overload tests on two 1/8th scale prestressed concrete bridge girders. The three span continuous girders were made with three pretensioned I-section girders, and were made continous for live loads by means of reinforcement in the composite cast-in-place deck. The structures were originally built as part of a study of the long-term behavior of prestressed concrete bridges. The structures were loaded with a model HS-type vehicle loading which was positioned to produce either high shears or approximately maximum moments in the various spans. The final tests produced very large deformations, and the maximum loads reached were in the range of 93 to 99 percent of the theoretical collapse loads. The behavior of the structures is described in terms of measured load-deflection and load-reaction curves, together with descriptions of the cracking that occurred as a result of the several loadings. Comparisons of measured and computed deflections, reactions, and cracking moments are the cracking moments larger than expected. (FHWA)

• Supplemental Notes:
  • Prepared in Cooperation with the Department of Transportation, Federal Highway Administration. Project Title "Field Investigation of Prestressed Reinforced Concrete Highway Bridges.
• 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
• Authors:
  • Gamble, W L
• Publication Date: 1980-3

Media Info

• Pagination: 87 p.

Subject/Index Terms

• TRT Terms: Continuous structures; Deflection; Deformation; Fracture mechanics; Girder bridges; Highway bridges; Load tests; Moments (Mechanics); Oversize loads; Prestressed concrete; Scale models
• Uncontrolled Terms: Overloads
• Old TRIS Terms: Moments
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00319110
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FHWA-IL-UI-182, FCP 40S1-122
• Files: TRIS, STATEDOT
• Created Date: Nov 19 1980 12:00AM