NEW CONCRETE ANCHORS FOR CARBON FIBER-REINFORCED POLYMER POST-TENSIONING TENDONS--PART 2: DEVELOPMENT/EXPERIMENTAL INVESTIGATION

A new nonmetallic anchor has been developed to avoid problems associated with metallic anchors used for fiber-reinforced polymer tendons. The anchor components are made of ultra high-performance concrete with compressive strength in excess of 200 MPa, developed specifically for this anchor. Special casting techniques were also developed to achieve the required concrete properties. The various production parameters of the new anchor were optimized through a sequential testing program. 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.