Simplified Full-Depth Precast Concrete Deck Panel Systems

NCHRP Research Report 895 presents new simplified connections between full-depth precast concrete deck panel and beam with proposed AASHTO LRFD Specification language for the design, fabrication, and construction. The new connection systems are based on comprehensive analytical and testing programs, and the proposed specification language presented with design examples. The new system utilizes clustered shear connectors spaced up to 6 ft and connected to the deck system using Ultra-High Performance Concrete (UHPC). In addition, the new system utilizes discrete joint connections (i.e. non continuous haunch) to eliminate blind grouting. The material in this report will be of immediate interest to bridge engineers. Full-depth precast concrete deck panels have been widely used in accelerated bridge construction (ABC) in various forms and sizes. As a prefabricated component, full-depth deck panel systems meet the objectives of ABC by expediting construction, improving quality and durability, improving public and worker safety, and reducing road user impact. Typically, deck panels are connected to the supporting beams by shear connectors in formed openings in panels (i.e., shear pockets) to achieve composite action between deck panels and beams of a bridge. The current use of shear connectors at small spacing poses several constructability challenges due to the large number of connectors and pockets. One of the challenges is the work associated with blind grouting/concreting the numerous shear pockets and the longitudinal haunch between the deck panels and the beams. Specifically, the leveling, sealing, forming, grouting, and concreting can be time consuming and require access from above and below the deck. This access requirement may create adverse traffic impacts. A new deck connection that can overcome these constructability challenges by reducing the number of shear pockets and eliminating blind grouting would provide additional benefits to this construction technique. Under NCHRP Project 12-96, the George Washington University was asked todevelop recommended guidelines and proposed AASHTO LRFD Specification language for the design, fabrication, and construction of a new full-depth precast concrete deck panel system that simplifies the connection between the deck panel and beams. A number of deliverables, provided as appendices, are available at http://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP12-96_AppendicesA-C.pdf These appendices are: Appendix A – Literature Review; Appendix B – Analytical Program; and Appendix C – Shop Drawings.

Language

  • English

Project

  • Status: Completed
  • Funding: $400000
  • Contract Numbers:

    Project 12-96

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

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

    Dekelbab, Waseem

  • Performing Organizations:

    George Washington University

    2121 Eye Street, NW
    Washington, DC  United States  20052
  • Principal Investigators:

    Badie, Sameh

  • Start Date: 20130701
  • Expected Completion Date: 20180630
  • Actual Completion Date: 20180630
  • Source Data: RiP Project 38349

Subject/Index Terms

Filing Info

  • Accession Number: 01547519
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 12-96
  • Files: TRB, RiP
  • Created Date: Dec 11 2014 1:00AM