REPAIR OF A FULL-SCALE PRESTRESSED CONCRETE BOX GIRDER AND FATIGUE PERFORMANCE OF THE REPAIRED GIRDER

Three full-scale precast, pretensioned box girders were tested. The study on the first two was focused on the strength and serviceability parameters and is reported elsewhere. This paper describes the results of the study on the third girder which involved the testing of a strand repair system and assessment of the repaired girder behavior under design fatigue loads in combination with periodically applied static overloads. Under this loading, strand stress ranges increased significantly, indicating the need to develop fatigue design criteria that account for potential overloads. After nearly 508,000 cycles of design load and periodic overloads, the shear strength of concrete dropped resulting in a shear/flexure failure mode.

• Corporate Authors:

  Iowa State University, Ames

  Department of Civil, Construction and Environmental Engineering
  Town Engineering Building
  Ames, IA  United States  50011-3232
• Authors:
  • Saiidi, M
  • Labia, Y
  • Douglas, B
• Conference:
  • Practical Solutions for Bridge Strengthening and Rehabilitation BSAR II
  • Location: Kansas City, Missouri
  • Date: 1997-3-24 to 1997-3-25
• Publication Date: 1997-3

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 305-314

Subject/Index Terms

• TRT Terms: Box girders; Bridges; Fatigue strength; Flexural strength; Girder bridges; Loads; Oversize loads; Prestressed concrete; Repairing; Static loads; Static tests
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00802440
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 29 2000 12:00AM