DEVIATION SADDLE BEHAVIOR AND DESIGN FOR EXTERNALLY POST-TENSIONED BRIDGES. INTERIM REPORT

This report is the second in a series outlining a major study of the behavior of post-tensioned concrete box girder bridges with post-tensioning tendons external to the concrete section. It presents the results of an experimental program in which ten very accurately sealed reinforced concrete models of typical tendon deviators were tested. Detailed instrumentation led to a very good understanding of the behavior of the various patterns of reinforcement in the deviators. The models included two very different patterns of detailing, several arrangements of tendon inclinations, and both normal and epoxy-coated reinforcement. The report evaluates the results with respect to both simplified conventional analysis methods and strut-and-tie models. The results provide the basis for deviator design recommendations and several examples are presented to illustrate the practical use of these recommendations.

• Record URL:
  • https://library.ctr.utexas.edu/digitized/texasarchive/phase2/365-2-CTR.pdf
• Supplemental Notes:
  • Research study title: Evaluation of Strength and Ductility of Precast Segmental Box Girder Construction with External Tendons.
• Corporate Authors:

  University of Texas, Austin

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

  Texas State Department of Highways & Public 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:
  • Beaupre, R J
  • Powell, L C
  • Breen, J E
  • KREGER, M E
• Publication Date: 1988-7

Media Info

• Features: Figures; References; Tables;
• Pagination: 236 p.

Subject/Index Terms

• TRT Terms: Box girders; Concrete; Design; Girder bridges; Posttensioning; Recommendations
• Uncontrolled Terms: Deviators; External tendons; Model tests
• Old TRIS Terms: Concrete box girders; Test results
• Subject Areas: Bridges and other structures; Design; Highways; Research; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00483830
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-89+365-2, Res Rept 365-2, CTR 3-5-85/8-365-2
• Contract Numbers: Study 3-5-85/8-365
• Files: TRIS, USDOT, STATEDOT
• Created Date: May 31 1989 12:00AM