CAPACITY OF FORM-HANGER ANCHORS IN PRESTRESSED CONCRETE GIRDERS. FINAL REPORT

A study of the practice of supporting formwork with cast-in-place and welded form-hanger anchors in precast, prestressed concrete girders was accomplished. The study included identification of the types of anchors available for use in Texas, identification of the existing procedures for selection and installation of such anchors, and laboratory testing of 60 anchors of various types in a full-scale girder. It is concluded that while the anchors tested did generally meet manufacturers' specified strengths, some anchor systems tend to fail in a brittle mode, without exhibiting significant deformation prior to ultimate failure. Furthermore, the strength of the various anchors is usually strongly dependent on edge distance, and specifications do not exist to satisfactorily ensure the safe placement and inspection of such anchors. Guidelines, in the form of a draft specification and interim recommendations are submitted for consideration by the Texas State Department of Highways and Public Transportation.

• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 1600 E Lamar Boulevard
  Arlington, TX  United States  76011

  Texas State Department of Highways & Public Transportation

  Transportation Planning Division, P.O. Box 5051
  Austin, TX  United States  78763

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • JAMES, R W
• Publication Date: 1989-10

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: 44 p.

Subject/Index Terms

• TRT Terms: Anchors (Structural connectors); Brittleness; Building; Facilities; Failure; Formwork; Girders; Guidelines; Installation; Laboratory tests; Prestressed concrete; Recommendations; Specifications; Strength of materials
• Uncontrolled Terms: Selecting
• Old TRIS Terms: Brittle failures; Form-hanger anchors
• Subject Areas: Bridges and other structures; Construction; Design; Highways; Maintenance and Preservation; Research; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00494541
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-90/1171-1F, Res Rept 1171-1F, TTI: 2-5-88-1171-1F
• Contract Numbers: Study 2-5-88-1171
• Files: TRIS, USDOT, STATEDOT
• Created Date: May 31 1990 12:00AM