Effects of the Concrete Strength and FRP Reinforcement Type on the Non-Linear Behavior of Concrete Deep Beams

Mostafa Kazemi, Mohammad Daneshfar, Yousef Zandi, Alireza Sadighi Agdas, Negin Yousefieh, Leili Mohammadifar, Aida Rahmani, Mohammad Saberian, Amr Mamdouh, Mohamed Amine Khadimallah and Jie Li
Additional contact information
Mostafa Kazemi: GeMMe Building Materials, Urban and Environmental Engineering Division (UEE), University of Liege, 4000 Liège, Belgium
Mohammad Daneshfar: Department of Civil Engineering, Deylaman Institute of Higher Education, Lahijan 43131, Iran
Yousef Zandi: Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz 51579, Iran
Alireza Sadighi Agdas: Ghateh Gostar Novin Company, Tabriz 51579, Iran
Negin Yousefieh: Department of Civil Engineering, University of Tehran, Tehran 14179, Iran
Leili Mohammadifar: Faculty of Architectural Engineering, Islamic Azad University, Kerman Branch, Kerman 1167, Iran
Aida Rahmani: Centre for Infrastructure Engineering, Western Sydney University, Penrith, NSW 2751, Australia
Mohammad Saberian: School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
Amr Mamdouh: Architectural Department, Faculty of Engineering and Technology, Future University in Egypt, New Cairo 11845, Egypt
Mohamed Amine Khadimallah: Civil Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Al-Kharj 16273, Saudi Arabia
Jie Li: School of Engineering, RMIT University, Melbourne, VIC 3000, Australia

Sustainability, 2022, vol. 14, issue 7, 1-28

Abstract: To provide sustainable reinforced concrete deep beams, the replacement of steel rebars by FRP rebars with high-chemical resistance is proposed by researchers. However, the effects of the concrete strength, top and web longitudinal reinforcements, and types of FRP flexural rebars on the non-linear performance of concrete deep beams have rarely been evaluated. This study numerically assessed the effects of the top and web longitudinal reinforcements and concrete strength on the non-linear behaviour of GFRP- and CFRP-strengthened concrete deep beams with various shear span-to-overall depth (a/h) ratios. As per the results, the highest tensile stress was obtained for the steel reinforcement, and the tensile stress in the CFRP reinforcement was more than that of the GFRP reinforcement under the failure load. Meanwhile, the results of high- and normal-strength concrete deep beams with the web reinforcement (16.4%) were lower than those without the web reinforcement (22.3%). Therefore, the web reinforcement moderately compensated for the low strength of normal concrete and the absence of the top longitudinal rebar to reinforce concrete deep beams in carrying the ultimate load. Furthermore, the participation of the GFRP reinforcement with the high-strength concrete was more than that with the normal-strength concrete in carrying a higher amount of loading.

Keywords: FE analysis; non-linear behaviour; web longitudinal reinforcement; GFRP and CFRP rebars; concrete strength (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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