Abstract:

The use of Fiber-Reinforced Polymer (FRP) reinforcements, both transversely and longitudinally, is becoming increasingly widespread due to their high corrosion resistance. However, FRP reinforcements, with a lower modulus of elasticity compared to steel reinforcements, contribute to a reduction in the cracking strength of reinforced concrete beams. The main aim of the present study is to investigate the shear behavior and strength of FRP longitudinally reinforced beams (a/d>2.5) without shear reinforcements. To achieve this, a database was established using 149 experimental data available in the literature. Shear strengths were predicted with commonly used existing codes and models in the literature. Variables affecting shear strength were investigated. Additionally, a new model for the shear design of FRP-reinforced reinforced concrete beams without shear reinforcements was proposed. The proposed model yielded closer predictions to experimental results compared to existing codes and models.

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