End Region Behavior of Pretensioned Concrete Beams with 0.7-Inch Prestressing Strands

While future implementation of 0.7-inch prestressing strand may reduce fabrication costs and extend the working range of pretensioned concrete beams, the limits of the technology have yet to be defined. An innovative combination of analytical and experimental methods will be used to resolve the primary technical challenges to the fabrication of sate serviceable TX girders with 0.7-inch strand. (1) End Region Servicability - Effective doubling of the stress imposed by each strand within a standard (2-inch by 2-inch) grid is expected to have a dramatic effect on the performance of current end region details. Practical modifications to the prestressing and end region reinforcement schemes will be experimentally evaluated and refined to obtain serviceable behavior. (2) Ultimate Shear Strength - The unique end region stresses imposed by 0.7-inch strand may influence the failure mode and ultimate strength of shear-dominated TX girders. Full-scale shear tests will be completed to identify the controlling shear failure mechanisms and assess the conservation of the corresponding shear capacities estimated through application of the American Association of State Highway and Transportation Officials Load and Resistance Factor Design (AASHTO LRFD) shear design provisions. Implementation of 0.7-inch strand through application of the research findings will be greatly facilitated by continuum Texas Department of Transportation (TxDOT) and industry stakeholder involvement throughout the course of the project.


  • English


  • Status: Completed
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483
  • Project Managers:

    Odell, Wade

  • Performing Organizations:

    University of Texas, Austin

    Center for Transportation Research
    Austin, TX  United States 
  • Principal Investigators:

    Bayrak, Oguzhan

  • Start Date: 20140731
  • Expected Completion Date: 0
  • Actual Completion Date: 20170831
  • Source Data: RiP Project 39954

Subject/Index Terms

Filing Info

  • Accession Number: 01569099
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6831
  • Files: RiP, STATEDOT
  • Created Date: Jul 1 2015 2:46AM