Moment Curvature and Ductility of FRP-Reinforced Concrete Beams having Different Types of Fibers

Abstract

The study investigated various fiber-reinforced polymer (FRP) bars and the flexural behavior of hybrid beams
constructed by placing concretes produced with different fibers into glass fiber-reinforced polymer (GFRP) box profiles. Hybrid beams were created by incorporating polypropylene, steel, and glass fiber concretes into the GFRP box profiles. Additionally, flexural tests were conducted using carbon, aramid, glass, basalt, and steel bars in the tensile zone for each beam type. The load-deflection and moment-curvature graphs of the hybrid beams were plotted, and their ductility and moment-curvature were calculated and compared. The performance of the FRP bars and fiber types was interpreted and analyzed. The results were evaluated under two categories: the effects of bar type and fiber type on hybrid beam behavior. GFRP hybrid specimens with GH class exhibited the highest ductility.