Manufacture and Performance Evaluation of FRP Rebar Featuring Ductility and211 Health Monitoring Capability

摘要

The main objective of this study was to develop a new type of FRP rebar with211u001efocus on ductility and health-monitoring issues. One approach to provide 211u001eductility was the use of a hybrid FRP reinforcing bar consisting of different 211u001etypes of fibers, which fail at different strains during the load history of the 211u001erebar, thereby allowing a gradual failure of the rabar. The Manufacturing of the 211u001erebar was achieved by pultrusion and filament winding techniques. These 211u001etechniques have made it possible to embed fiber optic sensors within the 211u001ereinforcement, for health monitoring, thus protecting the sensor from the harsh 211u001econcrete environment. Pseudo-ductile behavior was validated through testing of 211u001ecoupon FRP rebar as well as RC beams. Testing of large-scale beams reinforced 211u001ewith this hybrid FRP rebar exhibited remarkable ductility behavior with ductility 211u001eindices close to that of beams reinforced with steel rebar. Furthermore, the 211u001estrain measured from the embedded fiber optics replicates the measurement of 211u001econventional LVDT and was reliable up to failure of the beams.