Model for Nominal Bond-Shear Capacity of Pretensioned Concrete Girders

The 2010 AASHTO LRFD Bridge Design Specifications includes requirements for proportioning flexural reinforcement at the end of pretensioned girders to carry longitudinal tie forces acting above the support. To prevent bond failure of the longitudinal tie, AASHTO requires that "any lack of full development [of the tie] shall be accounted for." This paper proposes a model for calculating nominal bond-shear capacity, which is defined as the attendant shear force at bond capacity of the longitudinal tie. The model gives explicit consideration for tie development length. Variables in the model include bearing and girder geometry, longitudinal and transverse reinforcement details, and inclination angle of cracking. Derivation of the model is presented, and the model is compared with a database of experimental results compiled from the published literature. The proposed model can be used for designing girders that are resistant to bond-shear failure, particularly when partial strand debonding is employed. In some circumstances the model may justify exceedance of the AASHTO limits for partial strand debonding.

• Record URL:
  • https://doi.org/10.3141/2406-09
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=Model+for+Nominal+Bond-Shear+Capacity+of+Pretensioned+Concrete+Girders&author=B.+Ross&author=B.+Naji&publication_year=2014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309295000
• Authors:
  • Ross, Brandon E
  • Naji, Behnam
• Publication Date: 2014

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 79–86
• Monograph Title: Structures 2014, Volume 1
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2406
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bearing capacity; Bridge design; Databases; Debonding; Flexural strength; Girders; Load and resistance factor design; Material reinforcement; Pretensioning
• Identifier Terms: AASHTO LRFD Bridge Design Specifications
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01514938
• Record Type: Publication
• ISBN: 9780309295000
• Report/Paper Numbers: 14-0550
• Files: PRP, TRIS, TRB, ATRI
• Created Date: Feb 21 2014 3:16PM