Considering Fiber Reinforced Concrete below Neutral Axis of Beam for Shallow Sections - A Review

Abstract:

The utilization of Fiber Reinforced Concrete (FRC) as a structural material is steadily on the rise. Conventional concrete is characterized by its brittleness, displaying a flexural strength that falls within the range of 10-15% of its compressive strength. Incorporation of fibers into concrete enhances various mechanical properties, including tensile strength, flexural strength, and ductility. An advantageous feature of FRC is its capacity to consider cracked concrete below the neutral axis in the cross-section of a beam to some extent. Important factors influencing the flexural strengths of both Plain Concrete (PC) and FRC include the modulus of rupture, corresponding deflection, toughness index, energy absorption, and density. This results in a diminished requirement for additional reinforcement in beams. The modified stress-strain diagram proposed by Bashara proves valuable in integrating the effect of FRC on the tension side, an aspect previously neglected due to the inherent weakness of PC in tension. The ongoing literature review seeks to comprehensively explore the potential of fiber-reinforced concrete in beams situated below the neutral axis, concentrating on articles published in highly reputable journals over the past decade.

• Periodical: Construction Technologies and Architecture (Volume 15)
• Pages: 61-67
• DOI: https://doi.org/10.4028/p-dsUqU9
• Online since: January 2025
• Authors: Waseem Akram*, Majid Ali
• Keywords: Fiber-Reinforced-Concrete, Flexural Strength, Tension Zone, Toughness

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