ANALYSES OF POST-TENSIONED GIRDER ANCHORAGE ZONES

Several large thin-webbed box girders, with post-tensioned anchorage zones designed in accordance with AASHTO and ACI requirements, have experienced large cracks along the tendon path in the anchorage zones at the design stressing load. Cracking of this nature provides a path for penetration of moisture and salts and thus presents a potential corrosion and frost damage threat. In addition, such cracking negates a major reason for the use of prestressed concrete, the minimization of service load cracking. This report summarizes an extensive literature review which documents the state-of-the-art in anchorage zone analysis, behavior, and design recommendations. In addition, the report outlines the general utilization of a powerful three-dimensional finite element program--PUZGAP-3D--for analysis of the complex anchorage zone region. The program was used to study both straight and curved tendon paths. Good correlation was found with experimental results up to first cracking which indicated that the program was very useful for exploring the effects of various parameters. (FHWA)

• Corporate Authors:

  University of Texas, Austin

  Center for Transportation Research, 3208 Red River Street
  Austin, TX  United States  78705

  Texas State Department of Highways & Public Transp

  P.O. Box 5051
  Austin, TX  United States  78763

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Stone, W C
  • Breen, J E
• Publication Date: 1981-6

Media Info

• Pagination: 176 p.

Subject/Index Terms

• TRT Terms: Anchorages; Box girders; Computer programs; Finite element method; Fracture mechanics; Posttensioning; Reviews; Webbing
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00345090
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-81/31+208-1 Intrm Rpt., Res Rpt. 208-1, FCP 45F3-722
• Contract Numbers: Res Study 3-5-77-208
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jan 29 1982 12:00AM