Evaluation of CIP Reinforced Joints for Full-Depth Precast Concrete Bridge Decks

The use of precast concrete systems to expedite construction of bridge decks is gaining more acceptance as engineers strive to reduce the traffic delays caused by bridge construction projects. A recent scanning tour jointly sponsored by the American Association of State Highway and Transportation Officials, the Federal Highway Administration, and the National Cooperative Highway Research Program identified promising new precast concrete systems. Each system uses precast elements that are brought to the construction site ready to be set in place and quickly joined together. A concrete closure pour completes the deck connection and ties the individual units together in a manner that is intended to emulate monolithic behavior. Depending on the system, the connections are either transverse (across the width of the bridge) or longitudinal (along the length of the bridge). Examples of these systems include a French precast slab superstructure with overlapping looped reinforcement that extends into the longitudinal cast-in-place (CIP) connections, a Japanese full-depth deck panel system with similar looped reinforcement in the transverse CIP connections, and a Japanese full-depth deck flange system with similar looped reinforcement in the longitudinal CIP connection. Additionally, other deck connection details may be identified for development through this research. To implement promising new systems, design guidelines and standard details for the deck connections need to be established. The new connections need to avoid the cracking problems reported with some connections used in the United States. The guidelines need to address durability and provide designers with a method of evaluating the load-resistance capacities of the connections. The connections should be tested for fatigue performance and evaluated for seismic resistance. Critical goals include minimizing the required connection depth to accommodate the loop bar while ensuring concrete cover, achieving durable materials properties for the CIP concrete, and preventing moisture from penetrating the interface between the precast and CIP concrete. The objective of this project is to develop guidance for the design and construction of durable cast-in-place (CIP) reinforced concrete connections for precast deck systems that emulate monolithic construction.<br /><br /><p> </p>


  • English


  • Status: Active
  • Contract Numbers:

    Project 10-71


  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  USA  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  USA  20001
  • Project Managers:

    Dekelbab, Waseem

  • Performing Organizations:

    University of Minnesota, Minneapolis

    Center for Transportation Studies
    Minneapolis, MN  USA 
  • Principal Investigators:

    French, Catherine

  • Start Date: 20060705
  • Actual Completion Date: 20100831
  • Source Data: RiP Project 16071

Subject/Index Terms

Filing Info

  • Accession Number: 01464658
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 10-71, CTS-2007052
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:46PM