Strength of Horizontal Shear Reinforcement with Limited Development

The objective of this project is to determine if adequate horizontal shear capacity is provided by the 5-inch concrete deck on slab and box beams, despite lack of reinforcement development. Horizontal cracks between the precast beams and the cast-in-place decks were noticed in several Texas Department of Transportation (TxDOT) bridges. Those cracks could be due to stresses induced by shrinkage or shear forces. In any case, this shows that current TxDOT details might not provide sufficient horizontal shear resistance in those members. The work plan is to first conduct small scale tests to investigate the three major components of horizontal shear resistance: (1) cohesion and/or aggregate interlock, (2) friction between the crack faces, and (3) dowel action of the reinforcement. A simple bar pullout test will also be used to evaluate the influence of the bend curvature on the bond and slip characteristics of the horizontal shear reinforcement. Alternative details for surface roughness and bar geometries will be investigated. The second phase of this research will be testing several full-scale composite box and slab beams with current and proposed alternative details to investigate the overall composite behaviors that may be overlooked in the small scale tests.

Language

  • English

Project

  • Status: Completed
  • Contract Numbers:

    0-6718

  • Sponsor Organizations:

    Texas Department of Transportation

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

    Jensen, Darrin

    Eskridge, Amy

  • Performing Organizations:

    University of Texas, Arlington

    P.O. Box 4089
    Arlington, TX  United States  76010
  • Principal Investigators:

    Chao, Shih-Ho

  • Start Date: 20110901
  • Expected Completion Date: 0
  • Actual Completion Date: 20140831
  • Source Data: RiP Project 29402

Subject/Index Terms

Filing Info

  • Accession Number: 01568927
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6718
  • Files: RiP, STATEDOT
  • Created Date: Jun 30 2015 1:03AM