Structural response of high strength concrete beams using fiber reinforced polymers under reversed cyclic loading

Guo, Adam

doi:10.54113/j.sust.2022.000018

Cited by 28 publications

(8 citation statements)

References 44 publications

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“…The decrease in compressive strength with increasing rubber content limits the use of rubberized concrete with high rubber replacements. In our earlier investigation [26], we identified that 10% rubber content is best for maintaining the balance between environmental benefits and structural performance. In addition, the escalation in the rubber percentage led to a shift from ductile failure to brittle failure on the compression side [28].…”

Section: Effect Of Reinforcement Ratiomentioning

confidence: 98%

“…Amid the array of innovative materials aimed at improving the flexural toughness and overall performance of concrete, the integration of rubber has emerged as a partic-ularly noteworthy focus [26][27][28]. Extensive research has delved into the utilization of crumb rubber, derived from discarded tires, as a constituent in concrete mixtures.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Rubberized Steel Fiber Reinforced Concrete Beams Subjected to Static and Blast Loadings

Nawar,

Eisa,

Elshazli

et al. 2024

Infrastructures

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In recent years, the alarming number of terrorist attacks has highlighted the critical need for extensive research aimed at fortifying structures against explosion-induced loads. However, the insufficient energy absorption and brittleness of conventional concrete make it ineffective in withstanding blast loading, encouraging researchers to explore innovative strategies for augmenting the energy dissipation capabilities of construction materials. This study specifically delves into the incorporation of recycled rubber, a sustainable and environmentally friendly solution to the pressing issue of scrap tire disposal. The primary focus of this research revolves around the integration of rubber recycling and steel fibers into concrete, with the ultimate goal of enhancing the dynamic response of reinforced concrete (RC) beams. This novel approach not only contributes to the structural resilience required for resisting blast impacts, but also aligns with eco-friendly practices by reusing recycled rubber. A meticulous numerical investigation was undertaken to comprehensively assess the static and blast response of these augmented beams. The numerical study involved developing finite element (FE) models using ABAQUS version 6.14 for static implicit analysis and LS-DYNA R11 for blast explicit simulations. The ABAQUS model was validated against previous experimental testing for load–displacement and failure patterns. Similarly, the LS-DYNA model was validated for blast pressure in accordance with UFC-3-340 standards and for material response under blast loading, utilizing existing experimental data. The numerical models were designed to accommodate varying weight percentages of rubber, ranging from 5% to 20%, and a consistent 1.0% incorporation of steel fibers. This comprehensive analysis aims to provide valuable insights into the efficacy of these materials in improving the structural integrity and blast resistance of RC beams, thereby contributing to the development of more secure and sustainable construction practices. By reducing the reinforcement ratio in order to meet the minimum code requirements, it became evident that the failures of the rubberized RC beams tended to exhibit ductility on the tension side under static loading. In addition, the increase in the reinforcement ratio correlated with a higher failure load and decreased deflection. Furthermore, the findings indicated an optimal concrete mixture characterized by improved ductility, energy absorption, and blast load capacity, achieved by combining 5–10% rubber with steel fibers.

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Section: Effect Of Reinforcement Ratiomentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Rubberized Steel Fiber Reinforced Concrete Beams Subjected to Static and Blast Loadings

Nawar,

Eisa,

Elshazli

et al. 2024

Infrastructures

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“…For a fibre-reinforced cement-based material (FRCBM), or fibrous mortar/concrete, in addition to the concrete mix parameters [ 14 , 15 , 16 ], the fibres added also have certain influences on the fresh behaviours [ 17 , 18 , 19 ]. Soroushian and Bayasi [ 20 ] revealed that the shape of the steel fibres exhibits great influence on the fluidity of fibrous concrete mixes.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Modelling of Fresh Behaviours of Basalt Fibre-Reinforced Mortar Based on Average Water Film Thickness and Fibre Factor

Zeng³

et al. 2023

Materials

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Though previous studies have indicated that the fresh behaviours of plain mortar/concrete are mainly governed by the average water film thickness (AWFT), whether the concept of AWFT is also applicable to fibrous mortar/concrete still needs to be explored. Furthermore, for fibrous mortar/concrete, it is obvious that the fibres added also have certain effects on the fresh behaviours. In two previous studies on basalt fibre-reinforced mortar (BFRM), the integral effects of the AWFT and fibre dosage as well as the integral effects of the AWFT and fibre length were individually investigated. In this study, a fibre factor (FF) defined as the fibre volume multiplied by the fibre aspect ratio was employed and 24 extra mortar groups were tested. A total of 68 mortar groups were applied in numerical analysis. The results of the regression analysis yielded good correlations of the workability, fluidity, cohesiveness, and adhesiveness of BFRM with the AWFT and FF, suggesting that the AWFT and FF are together the governing parameters controlling the fresh behaviours of BFRM. Hence, the AWFT and FF may be used to develop a model for the fresh properties of BFRM.

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“…Under coastal conditions, saline soils, splash, and tidal scour accelerate the rate of chloride ion intrusion, inducing the cracking of structural interfaces and leading to severe deterioration of concrete structures (Zheng et al 2021;Garavaglia et al 2022;Mohamed et al 2022;Corbi et al 2021). Thus, it is necessary to protect structures (or members) from corrosion to improve their durability.…”

Section: Introductionmentioning

confidence: 99%

Study on the Axial Load Response of RC Columns Confined by CTRC Subjected to Dry-Wet Cycles

Zhang

Zheng

et al. 2023

ACT

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To investigate the axial load response of reinforced concrete (RC) columns confined by carbon textile-reinforced concrete (CTRC) under chloride attack, 24 CTRC-confined square columns and 12 unconfined columns were tested under axial load, while considering the influences of dry-wet cycles, textile ratios, stirrup ratios, and section sizes. The experimental results indicate that the corrosion resistance and compression performance of RC columns under chloride ion erosion were significantly improved by CTRC. The corrosion of the RC column with CTRC confinement was remarkably reduced with a maximum of 63.9% in the chloride salt environment. The maximum increments of bearing capacity and ductility of CTRC-confined columns were 30.9% and 87.7%, respectively, compared with unconfined columns. In addition, bearing capacity, ductility, and deformation energy were also affected by stirrup ratios and section sizes. Finally, the semiempirical and semi-theoretical analytical models of the stress-strain relationship and axial-bearing capacity were proposed based on the experimental data and theoretical analysis. The compound confinement effects of CTRC and corroded stirrups on core concrete was considered in the proposed models. The models correlated well with the experimental data.

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Structural response of high strength concrete beams using fiber reinforced polymers under reversed cyclic loading

Cited by 28 publications

References 44 publications

Numerical Analysis of Rubberized Steel Fiber Reinforced Concrete Beams Subjected to Static and Blast Loadings

Numerical Analysis of Rubberized Steel Fiber Reinforced Concrete Beams Subjected to Static and Blast Loadings

Experimental Study and Modelling of Fresh Behaviours of Basalt Fibre-Reinforced Mortar Based on Average Water Film Thickness and Fibre Factor

Study on the Axial Load Response of RC Columns Confined by CTRC Subjected to Dry-Wet Cycles

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