Review on flexural performance of reinforced concrete beams designed with hybrid bars

Abstract

Reinforced steel bars, commonly used in concrete construction, are prone to corrosion due to their insufficient corrosion resistance, which ultimately leads to reduced durability and long-term performance. Moisture interaction is the leading cause of corrosion, which results in rust, cracks, and spalling, leading to durability and long-term performance issues. To address this problem, FRP bars are now being introduced to the market, which offer numerous benefits over steel bars, such as strong corrosion resistance, higher tensile strength, and reduced weight, leading to lower shipping and labor costs. Concrete gains mechanical stability, stiffness, durability when polypropylene fibres are used, improving the material's effectiveness. The purpose of this study is to examine the flexural behavior, load-deflection characteristics, and ductility of hybrid reinforced concrete beams. that use both GFRP bars and steel bars, as well as compare them with reinforced concrete beams that use only GFRP bars or steel bars with and without using polypropylene fibres as a supplement. In order to enhance the beams flexural strength as well as ductility, it has been identified that 0.25% of their volume should be made up of polypropylene fibres. After the experimental investigation is finished, analytical studies using ANSYS simulation will be carried out to determine the load-deflection behaviours.

Keywords

• glass fiber reinforced polymer bar
• polypropylene fiber