Title:
lexural Performance of Glass Fiber-Reinforced Polymer and Highly Ductile Stainless-Steel Hybrid Reinforced Concrete Beams (Prepublished)
Author(s):
Qi Cao, Teng Zhang, Shu Cao, Zhimin Wu, Jinjin Xu
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
ductility; flexural behavior; glass fiber-reinforced polymer bars; hybrid reinforcement; stainless steel bars
DOI:
10.14359/51749489
Date:
1/19/2026
Abstract:
To improve the ductility of fiber-reinforced polymer reinforced concrete structures, the hybrid reinforcement with glass fiber-reinforced polymer (GFRP) and stainless steel (SS) is selected in this paper. Nine seawater sea sand concrete beams were designed and tested. The effects of concrete strength, effective reinforcement ratio ρ2, and reinforcement type in the tensile zone on the flexural behavior of the beams were analyzed. The test results show that with the same concrete strength and the same effective reinforcement ratio ρ2, the ductility of hybrid reinforced beams is higher than GFRP reinforced beams; the comparison of mid-span deflection of the GFRP bars and hybrid reinforced beams are not only depend on the reinforcement type, but also depend on the total stiffness of reinforcement before SS bars yield in the tensile zone and whether the SS bars are yielding in the tensile zone. Meanwhile, theoretical analysis was conducted for cracking moment, ultimate flexural load-carrying capacity, and mid-span deflections. A new ultimate flexural load-carrying calculation equation was proposed, which predicted the experimental values in good agreement.