Determine Service and Ultimate Behavior for Bent to Column Joints in TxDOT Substructures

The Bridge Design Manual requires consideration of various extreme events such as lateral stream loads and debris accumulation during flooding, severe scouring, and loss of supports due to collision for multi-column bent cap design. Typically, column-to-cap connections are designed as simple supports. As a result, current/past details have no confinement in bent cap joints, and the longitudinal column reinforcement is not always fully developed into the cap. Detailing joints for developing plastic capacity, as well as to permit sufficient load redistribution, is a common strategy in design for extreme loading scenarios (e.g., seismic design). To accommodate this increased moment demand, the standard column-to-cap connection requires improved detailing techniques. The research team will utilize analytical/computational methods and an experimental program to investigate the performance of bent cap connections with traditional and improved details. The research team will provide practical, easily implementable design recommendations for column-bent connections through these activities: (1) reviewing literature to identify state-of-the-art detailing techniques and design parameters; (2) performing analytical or computational analysis to determine moment demand induced by extreme events; (3) developing improved detailing methods and retrofitting methods; (4) conducting large-scale structural experiments to investigate the performance of various details; (5) providing design guidelines for designers to account for the extreme events.


  • English


  • Status: Active
  • Funding: $1275133
  • Contract Numbers:


  • 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:

    Kasberg, Katelyn

  • Performing Organizations:

    Center for Transportation Research

    3925 W. Braker Lane
    Austin, TX  United States  78759
  • Principal Investigators:

    Bayrak, Oguzhan

  • Start Date: 20210901
  • Expected Completion Date: 20250831
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01782679
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-7113
  • Files: RIP, STATEDOT
  • Created Date: Sep 23 2021 9:36AM