MANUFACTURE AND PERFORMANCE EVALUATION OF FRP REBAR FEATURING DUCTILITY AND HEALTH MONITORING CAPABILITY

The main objective of this study was to develop a new type of fiber reinforced plastic (FRP) rebar with focus on ductility and health-monitoring issues. One approach to provide ductility was the use of a hybrid FRP reinforcing bar consisting of different types of fibers, which fail at different strains during the load history of the rebar, thereby allowing a gradual failure of the rebar. The manufacturing of the rebar was achieved by pultrusion and filament winding techniques. These techniques have made it possible to embed fiber optic sensors within the reinforcement, for health monitoring, thus protecting the sensor from the harsh concrete environment. Pseudo-ductile behavior was validated through testing of coupon FRP rebar as well as reinforced concrete beams. Testing of large-scale beams reinforced with the hybrid FRP rebar exhibited remarkable ductility behavior with ductility indices close to that of beams reinforced with steel rebar. Furthermore, the strain measured from the embedded fiber optics replicates the measurement of conventional linear variable differential transformers (LVDTs) and was reliable up to failure of the beams.

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 94 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00800246
  • Record Type: Publication
  • Report/Paper Numbers: RDT 99-005,, Final Report,, RI 97-012
  • Files: NTL, TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Oct 19 2000 12:00AM