Structural Behavior of Hollow Reinforced Concrete Beams: A Review

Abdulhusain, Haider M.; Ismael, Murtada A.

doi:10.24237/djes.2020.13411

Cited by 6 publications

(1 citation statement)

References 8 publications

(8 reference statements)

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“…The flexural strength of hollow, traditionally reinforced concrete elements can be equal to the flexural strength of solid elements while having significantly lower weight [ 6 , 7 , 8 , 9 ]. The main limitations of the weakened hollow cross-section are lower shear strength which has to be considered in the design of the shear reinforcement, and also the compression zone, which will restrict the dimensions and position of the hollow core.…”

Section: Introductionmentioning

confidence: 99%

Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams

et al. 2023

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This article presents woven carbon-fiber-reinforced polymer (CFRP) tubular mesh used as a reinforcement on the inner surface of hollow beams made of high-performance concrete (HPC). The tubular mesh was designed to serve as both the tensile and shear reinforcement of hollow beams intended for the construction of small self-supporting structures that could be assembled without mechanization. The reinforcement was prepared with a tri-axial weaving machine from carbon filament yarn and was homogenized using epoxy resin. The interaction of the composite reinforcement with the cementitious matrix was investigated, and the surface of the reinforcement was modified using silica sand and polyvinyl alcohol (PVA) fibers to improve cohesion. The sand coating enhanced bond strength, resulting in the significantly higher flexural strength of the hollow beam of 128%. The PVA fibers had a lower positive effect of 64% on the flexural strength but improved the ductility of the beam. Individual beams were connected by gluing steel parts directly inside the hollow core of the HPC beam. This procedure provides good interaction between the CFRP reinforcement and the glued steel insert and allows for the fast and simple assembly of structures. The weaving of additional layers of the CFRP reinforcement around HPC beams was also explored. A small structure made of the hollow HPC beams with inner composite reinforcement was constructed to demonstrate the possibilities of the presented technology.

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Section: Introductionmentioning

confidence: 99%

Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams

et al. 2023

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Shear behavior of box‐section concrete beams reinforced by FRP bars and FRP stirrups

Ebrahim,

Mahmoud,

Salama

et al. 2024

Structural Concrete

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A few research studies are available on the behavior of reinforced concrete (RC) box section beams with fiber‐reinforced polymer bars (FRP) and FRP stirrups. Consequently, the behavior of these beams needs to be investigated. This article studies experimentally, numerically, and analytically the effect of some variables on the behavior of RC box section beams. This article investigates many variables, such as the shear span‐to‐total depth ratio, the flexural FRP reinforcement ratio, and the FRP vertical and horizontal web reinforcement ratio. The experimental program consists of nine simply supported reinforced concrete box section beams. The numerical models using the nonlinear finite element program ANSYS V.15 are carried out. The results are compared to the experimental results using load‐deflection curves, crack patterns, failure loads, and failure modes. The shear capacities based on Egyptian ECP 208‐2019 and ACI 440‐2015 codes are compared to each other and to the experimental results. The findings show an adequate agreement between the experimental, numerical, and analytical results for the range of the studied parameters. The results reveal that increasing the shear span‐to‐depth ratio by 50% decreases the carrying capacity, toughness, and displacement ductility by 2%, 28%, and 12%, respectively. The increase in main FRP reinforcement rebars by 20% increases the carrying capacity and toughness by 59% and 62%, respectively. Increasing vertical FRP stirrups by 79% increases the failure load and toughness by 26% and 15%, respectively, and displacement ductility increases only by 0.8%. The increase in horizontal FRP stirrups by 79% increases the failure load, toughness, and displacement ductility by 33%, 8%, and 4%, respectively. Both Egyptian and American codes are conservative in some cases and unconservative in others, while the numerical results are unconservative.

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Flexural Behavior of Concrete Hollow-Core Beams Reinforced with GFRP Bars: Experimental and Analytical Investigation

Alharthi,

Al-Osta,

Rahman

et al. 2023

Arab J Sci Eng

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Structural Behavior of Hollow Reinforced Concrete Beams: A Review

Cited by 6 publications

References 8 publications

Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams

Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams

Shear behavior of box‐section concrete beams reinforced by FRP bars and FRP stirrups

Flexural Behavior of Concrete Hollow-Core Beams Reinforced with GFRP Bars: Experimental and Analytical Investigation

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