Re-Examine Minimum Reinforcement Requirements for Shear Design

Minimum shear reinforcement requirements in the Association of State Highway Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications are based on tests conducted on reinforced concrete panels and beams. The extension of these requirements to prestressed concrete beams introduced significant conservatism in the current LRFD provisions for shear design. More accurate provisions are necessary to better predict the shear strength of prestressed beams. The objective of this project is to investigate the validity of the minimum shear reinforcement requirements and develop new/revised guideline specifications. The research team will: 1) Perform a literature review and outreach in order to synthesize a unique database of load tests for prestressed concrete beams, which the research team will analyze using data driven methods to identify major design parameters and missing information that will inform an experimental program. 2) Perform twenty (20) full scale tests on ten (10) commonly used prestressed girders combining a range of identified design parameters to comprehensively re-examine the minimum reinforcement requirements of AASHTO LRFD Bridge Design Specifications accounting for reserve strength and ductility and as well as performance under service conditions. The research team will complement the experimental program by analytical modelling to expand its impact. 3) Develop design guidelines for the minimum reinforcement requirements based on the synthesized comprehensive dataset complemented by the full-scale tests and analytical modeling. The research team will also pursue integration of these guidelines in the AASHTO LRFD Bridge Design Specifications.

Language

  • English

Project

  • Status: Active
  • Funding: $930,904
  • Contract Numbers:

    0-7114

  • Sponsor Organizations:

    Texas Department of Transportation

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

    Texas Department of Transportation

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

    Adediwura, Jade

  • Performing Organizations:

    Texas A&M Transportation Institute

    Texas A&M University System
    3135 TAMU
    College Station, TX  United States  77843-3135
  • Principal Investigators:

    Sideris, Petros

  • Start Date: 20210901
  • Expected Completion Date: 20240831
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01782678
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-7114
  • Files: RIP, STATEDOT
  • Created Date: Sep 23 2021 9:27AM