FLEXURAL BEHAVIOR OF CONCRETE MEMBERS REINFORCED WITH BASALT FRP-STEEL WIRES COMPOSITE BARS: NUMERICAL AND EXPERIMENTAL STUDY

Document Type : Original Article

Authors

1 Department of Civil Engineering, Faculty of Engineering, Al-Azhar University, Qena, Egypt.

2 Department of Civil Engineering, Faculty of Engineering, Al-Azhar University, Naser City, Cairo, Egypt.

Abstract

Basalt FRP-steel composite bars are being utilized as a novel ductile material to address the low elastic modulus and brittle characteristics of basalt FRP bars, moreover the corrosion of conventional steel bars, particularly in constructions subjected to severe environmental conditions. This article provides a comparative investigation of experimental, numerical and theoretical approaches aimed to conduct the flexural and serviceability performance of concrete beams reinforced with either basalt FRP bars or basalt fibers-steel wires composite bars. Four reinforced concrete beams were subjected to four-point static load to examine the flexural load capacity, mid-span deflection, crack patterns, modes of failure and strain in both concrete and longitudinal reinforcement of the tested beams. The main parameter was the type of main longitudinal reinforcement (steel bars, basalt FRP bars and basalt fibers-steel wires composite bars with different steel wires-to-BFRP ratios). Furthermore, 3D nonlinear finite element analysis (FEA) was conducted utilizing "ANSYS 15" software package to calibrate and verify the experimental test with respect to the flexural ultimate load capacity, cracks propagation, mid-span deflection and the main reinforcement strain. Moreover, the FEA model was expanded to simulate more different types of basalt fibers-steel wires composite that were employed as main reinforcement for the tested concrete beams. Experimental and numerical analysis showed that using basalt fiber- steel wires composite bars in concrete beams led to noticeable reduction in the deflection and the cracks width accompanied with considerable improvement in the flexural capacity for tested beams. Also, the numerical results obtained by using the FEA approach exhibited

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Journal of Al-Azhar University Engineering Sector
Volume 20, Issue 74
January 2025
Pages 155-171

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