Many  researchers have shown that it is engineering feasible to use fiber-reinforced polymer (FRP) bars instead of steel bars as the tension-affected main bars in reinforced concrete structures. However, concrete slabs strengthened with FRP bars are limited in the field of civil engineering. For example, the elastic modulus of FRP bars is low, and the ductility of the member is reduced due to the brittleness of FRP bars. To solve these problems as much as possible, scholars have adopted an idea that can use both FRP bars and steel bars in concrete members. There are still some problems with the bending behavior and durability of the proposed structural reinforcement, and further research is needed in this area. In this paper, the concrete slabs strengthened with GFRP reinforcement and reinforced mixing on the bending properties and durability of the experimental research, and some important findings are summarized.

Yanru Ren. Durability and Flexural properties of Concrete slabs with mixed GFRP bars and Steel bars. Academic Journal of Engineering and Technology Science (2021) Vol. 4, Issue 5: 15-19. https://doi.org/10.25236/AJETS.2021.040503.

[1] Gerwick B C. Concrete in the Marine Environment [J]. Cement Concrete and Aggregates, 1992, 14(1): 1.

[2] Bencardino F, Condello A, Ombres L. Numerical and analytical modeling of concrete beams with steel, FRP and hybrid FRP-steel reinforcements [J]. Composite Structures, 2016, 140: 53-65.

[3] Saikia B, Kumar P, Thomas J, et al. Strength and serviceability performance of beams reinforced with GFRP bars in flexure [J]. Construction & Building Materials, 2007, 21(8): 1709-1719.

[4] ZHOU Jianmin,WANG Xiaofeng,GU Wanli,et al.Experiment and theoretical research on flexural behavior of RC slab with high-strength bars [J].Chinese Quarterly of Mechanics,2011,32(14):626-633

[5] Qu W, Zhang X, Huang H. Flexural behaviour of concrete beams reinforced with hybrid (GFRP and steel) bars [J]. Journal of Composites for Construction, 2009, 13(5): 350-359.

[6] Barris C, Torres L, Comas J, et al. Cracking and deflections in GFRP RC beams: An experimental study[J]. Composites Part B Engineering, 2013, 55(12): 580-590.

[7] Protchenko K, Młodzik K, Urbański M, et al. Numerical estimation of concrete beams reinforced with FRP bars[J]. MATEC Web of Conferences, 2016, 86: 78-97.

[8] Leung H Y, Balendran R V. Flexural behaviour of concrete beams internally reinforced with GFRP rods and steel rebars [J]. Structural Survey, 2003, 21(4): 146-157.

[9] Hawileh R A. Finite element modeling of reinforced concrete beams with a hybrid combination of steel and aramid reinforcement [J]. Materials & Design, 2015, 65: 831-839.

[10] GE Wenjie, ZHANG Jiwen, DAI Hang. Flexural behavior of concrete beam with hybrid reinforcement of FRP bar and steel bars [J]Journal of Southeast University,2012,42(1):114-119

Bencardino F, Condello A, Ombres L. Numerical and analytical modeling of concrete beams with steel,

[11] FRP and hybrid FRP-steel reinforcements [J]. Composite Structures, 2016, 140: 53-65.

[12] ACI Committee 440. Guide for the design and structural of concrete reinforced with Fiber-reinforced polymer (FRP) bars (ACI 440.1R-15). American Concrete Institute, Farmington Hills, MI, USA, 2015.