Title:
Open Issues on the Structural Performances of Concrete Beams Reinforced with FRP (Fiber Reinforced Polymers) Rebars
Author(s):
Maria Antonietta Aiello and Luciano Ombres
Publication:
Symposium Paper
Volume:
360
Issue:
Appears on pages(s):
369-382
Keywords:
Concrete, FRP bars, beams, serviceability, deformability
DOI:
10.14359/51740636
Date:
3/1/2024
Abstract:
The issues related to deformability, strength and ductility of concrete elements reinforced with FRP (Fiber Reinforced Polymer) bars are critically analyzed and discussed in this paper. The analysis is conducted from an experimental point of view by means of bending tests on concrete beams reinforced with Carbon FRP (CFRP) bars with different amounts of reinforcement, and by an analytical approach aiming to evaluate the deflection and cracking phenomenon (number and width of cracks). The experimental results are compared with the analytical predictions and with predictions developed on the basis of the available codes (ACI, EC2, JSCE). The analysis of the results obtained confirms the most relevant issues of the mechanical behavior of FRP bar-reinforced beams, still worthy of research efforts; some technological and construction solutions that can provide significant improvements are also addressed.
Related References:
1. Nanni A., de Luca A., Jawaheri Zadeh H. Reinforced Concrete with FRP bars: Mechanics and Design. CRC Press; Boca Raton, FL, USA, 2014
2. ACI Committee 440. Guide for the design and construction of structural concrete reinforced with Fiber Reinforced Polymers (FRP) bars (ACI 440.1R-159. American Concrete Institute; Farmington Hills, MI, USA; 2015
3. Japan Society of Civil Engineering, JSCE. Research Committee on Continuous Fiber Reinforcing Materials. “Recommendation for design and construction of reinforced concrete structures using continuous fiber reinforcing materials”, 1995
4. Aiello M.A. and Ombres L., Load-deflection analysis of FRP reinforced concrete flexural members, Journal of Composites for Construction, 4(4), 2000
5. Aiello M.A. and Ombres L., Structural performances of concrete beams with hybrid (Fiberreinforced Polymer-steel) reinforcements, Journal of Composites for Construction, 6(2), 2002
6. CEN (European Committee for Standardization). Testing hardened concrete. UNI EN 12390, Brussels, Belgium: CEN, 2010
7. Eurocode 2. “Common unified rules for reinforced concrete structures “. ENV 1992-1-1. European Committee for Standardization, Brussels, 1992
8. Peng F., Deng J. and Xue W. 2023. Design provisions for flexural strength of hybrid reinforced concrete beams with fibre-reinforced polymer and steel bars. ACI Structural Journal, 120 (1), 49-59.
9. Hussein A., Huang H., Okuno Y. and Wu Z. 2022. Experimental and numerical parametric study on flexural behavior of concrete beams reinforced with hybrid combinations of steel and BFRP bars, Composite Structures, 302, 116230.
10. Abbas H., Abadel A., Almusallam T. and Al-Salloum Y. 2022. Experimental and analytical study of flexural performance of concrete beams reinforced with hybrid of GFRP and steel rebars, Engineering Failure Analysis , 138, 106397.
11. Ortiz J. D., Dolati S.S.K., Malla P., Nanni A. and Mehrabi A. 2023. FRP-Reinforced strengthened concrete: State-of-the-art review on durability and mechanical effects, Materials, 16 (5). doi: 10.3390/ma16051990
12. Nepomuceno, E., Sena-Cruz J., Correja L. and D’Antino T. 2021. Review on the bond behavior and durability of FRP bars to concrete. Construction and Building Materials, 287, 123042. doi: 10.1016/j.conbuildmat.2021.123042