Parametric study on the behavior of CFRP-strengthened reinforced concrete deep beams with cut circular web openings in shear spans
Eren Yagmur
TL;DR
This study examines how cutting circular openings in deep concrete beams affects their strength and how carbon fiber reinforcement can help.
Contribution
The study introduces a parametric analysis of CFRP-strengthened deep beams with cut openings, considering real-world stirrup damage.
Findings
Increasing opening diameter significantly reduces load capacity and energy absorption.
Thicker CFRP laminates only partially restore beam performance.
Stirrup damage limits the effectiveness of CFRP strengthening.
Abstract
Web openings in reinforced concrete deep beams are often necessary for functional purposes but substantially reduce structural performance. Carbon fiber-reinforced polymer (CFRP) strengthening is commonly employed to mitigate these effects. Previous studies typically examined openings in regions without stirrups or assumed closed stirrup configurations, overlooking the frequent stirrup damage that occurs in practice due to the high shear reinforcement in deep beams. In this study, three specimens from a prior experimental program were modeled in ABAQUS, and the numerical results were validated against experimental data. Openings of varying diameters were introduced by cutting reinforcements, and the beams were subsequently strengthened with CFRP laminates, and a parametric study was conducted. Results showed that increasing opening diameter markedly reduces load-carrying capacity and…
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Taxonomy
TopicsStructural Behavior of Reinforced Concrete · Concrete Corrosion and Durability · Masonry and Concrete Structural Analysis