New Concrete Anchors for Carbon Fiber-Reinforced Polymer Post-Tensioning Tendons—Part 2: Development/Experimental Investigation

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Title: New Concrete Anchors for Carbon Fiber-Reinforced Polymer Post-Tensioning Tendons—Part 2: Development/Experimental Investigation

Author(s): Mahmoud M. Reda Taha and Nigel G. Shrive

Publication: Structural Journal

Volume: 100

Issue: 1

Appears on pages(s): 96-104

Keywords: nchor; concrete; fiber-reinforced polymer; post-tensioning; prestress.

Date: 1/1/2003

Abstract:
To avoid problems associated with metallic anchors used for fiber-reinforced polymer (FRP) tendons, a new nonmetallic anchor has been developed. The anchor components are made of ultra-high-performance concrete (UHPC) with compressive strength in excess of 200 MPa developed especially for this anchor. Special casting techniques were developed to achieve the required concrete properties. The different production parameters of the new anchor were optimized through a sequential testing program. These parameters include the anchor geometry, the number of carbon FRP (CFRP) layers needed to reinforce the concrete barrel and the anchor seating load. A multi-phase experimental program examining the anchor performance under both monotonic and cyclic loading is presented. The concrete anchor showed excellent mechanical performance by passing the acceptable short-term and fatigue requirements.