Non-contact Splices at Drilled Shaft to Bridge Column Interface

Use of the contact lap splices of the reinforcement is common for the construction of reinforced concrete structures. It is now often required to provide a reinforcing steel splicing arrangement with non-contact lap splices for the connection of non-circular bridge columns interfacing directly with circular drilled shafts. The general requirement of a splice is to transfer the forces from one rebar to another without spalling of surrounding concrete and large cracks. Accordingly, there is concern about whether the non-contact splices at drilled shaft to bridge column connections are safe and cost effective because the guidance in current American Association of State Highway and Transportation Officials (AASHTO) code and research for this type of connection is limited. This research project shall conduct the experimental and analytical investigation on the behavior of non-contact splices at geometrically dissimilar bridge column and drilled shaft interfaces with regards to the following parameters: (a) splice length, (b) splice spacing, (c) amount of confining reinforcement, (d) reinforcing steel ratio, and (e) strength of reinforcing bars. Design provisions of existing regulations, especially AASHTO Load and Resistance Factor Design (LRFD) code, shall be reevaluated through the experimental approach. Finally, a rational design method and appropriate construction practices shall be established for safe and serviceable non-contact splices at bridge column and drilled shaft connections.


  • English


  • Status: Active
  • Funding: $616,995
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

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

    Steele, Joanne

  • Performing Organizations:

    University of Houston, Texas

    Houston, TX  United States 
  • Principal Investigators:

    Mo, Yi-Lung

  • Start Date: 20160126
  • Expected Completion Date: 20190228
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01618960
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6914
  • Files: RiP, STATEDOT
  • Created Date: Dec 20 2016 12:04PM