ENHANCING THE STRENGTH AND DUCTILITY OF POST-TENSIONED SEGMENTAL BOX-GIRDER BRIDGES. FINAL REPORT

An investigation was conducted to determine the effect of using external tendons, discretely bonded at intermediate diaphragms, and supplemental, grouted internal tendons on the strength and ductility of post-tensioned segmental box-girder bridges. In the current research program, additional experimental testing, performed on an existing three-span bridge model that was constructed and tested during an earlier study, and an analytical study were performed to examine the influence of improved bonding of external tendons and supplemental internal tendons on the behavior of segmental box-girder bridges. Both the experimental and the analytical portion of the study were carried out in three phases. Results of the tests and computer model indicated that both discrete bonding of external tendons and use of supplemental, grouted internal tendons improved the strength and ductility of segmental box girder construction. Design recommendations for predicting the ultimate external tendon stress and for enhancing the strength and ductility of segmental box girder construction are presented in this report.

• Supplemental Notes:
  • Research study title: Effect of Improved Bonding of External Tendons and the Use of Supplemental Continuous Bonded Tendons in External Post-Tensioned Bridges.
• Corporate Authors:

  University of Texas, Austin

  Center for Transportation Research, 3208 Red River Street
  Austin, TX  United States  78705

  Texas Department of Transportation

  Transportation Planning Division, P.O. Box 5051
  Austin, TX  United States  78763

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Hindi, ANA
  • KREGER, M E
  • Breen, J E
• Publication Date: 1991-4

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 378 p.

Subject/Index Terms

• TRT Terms: Bonding; Box girder bridges; Design; Ductility; Mathematical models; Posttensioning; Recommendations; Segmental construction; Strength of materials; Structural analysis; Structural mechanics
• Uncontrolled Terms: Analytical models; External tendons; Internal tendons; Model tests; Structural behavior
• Old TRIS Terms: Test results
• Subject Areas: Bridges and other structures; Design; Highways; Research; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00625387
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-92+1209-2F, Res Rept 1209-2F, CTR 3-5-89/0-1209-2F
• Contract Numbers: Study 3-5-89/0-1209
• Files: TRIS, USDOT, STATEDOT
• Created Date: Nov 23 1996 12:00AM