Anchorage of Carbon Fiber Reinforced Polymer (CFRP) Tendons Using Cold-Swaged Sleeves

Abstract

This paper presents the test results of an anchorage system for carbon fiber reinforced polymer (CFRP) prestressing tendons. The system consisted of a metal sleeve attached to a CFRP rod that can be gripped with a matching wedge and barred assembly. Three different procedures for attaching the sleeves to the rods were studied. Specimens with resin filled, epoxy bonded, or swaged sleeves were prepared and tested in tension to failure. It was observed that the strength and failure mode of the resin-filled and epoxy bonded sleeves varied widely and were sensitive to the preparation of the specimens. In contrast, the specimens provided with swaged sleeves showed dependable strengths and consistent failure modes. In addition, this technique was found to be more practical and better suited for the anchorage of CFRP tendons in the field.