Epoxy Socketed Anchors for Nonmetallic Prestressing Tendons


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Title: Epoxy Socketed Anchors for Nonmetallic Prestressing Tendons

Author(s): Lars E. Holte, Charles W. Dolan, and Richard J. Schmidt

Publication: Special Publication

Volume: 138


Appears on pages(s): 381-400

Keywords: anchors (fasteners); epoxy reins; fiber reinforced plastics; finite element method; prestressing steels; shear stress; Structural Research

Date: 9/1/1993

Finite element analyses and experimental confirmation tests were conducted to evaluate epoxy-socketed anchors for fiber reinforced plastic prestressing tendons. The studies disclosed that a parabolically varying profile provides superior performance compared to a conventional linear conic anchor. It was also found that an anchor with a bond release agent on the surface between the socket and resin plug results in a lower peak shear stress compared to a bonded anchor. The combination of a parabolic anchor and bond release agent permits use of a wider range of resins as socketing agents and is less sensitive to construction tolerances. Additional research is suggested to optimize material selection, anchor geometry, and anchor construction.