Title: Experimental behavior of novel GFRP reinforcing bars under compressive loads // Magazine of Civil Engineering. – 2023. – С. 11805
Creators: Almerich-Chulia A.; Martin-Concepcion P.; Molines-Cano J. M.; Moreno-Puchalt J.
Imprint: 2023
Collection: Общая коллекция
Subjects: Строительство; Строительная механика; reinforcing bars; experimental behavior of rods; fiberglass; compression loads; reinforced polymers; reinforced concrete; арматурные стержни; экспериментальное поведение стержней; стекловолокна; нагрузки на сжатие; армированные полимеры; железобетон
UDC: 624.04
LBC: 38.112
Document type: Article, report
File type: PDF
Language: English
DOI: 10.34910/MCE.118.5
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)
Record key: RU\SPSTU\edoc\70494

Allowed Actions: Read Download (1.0 Mb)

Group: Anonymous

Network: Internet


Glass fiber-reinforced polymer (GFRP) bars have been used in RC structures due to their high tensile strength capacity and resistance to corrosion in comparison with steel. However, international standards do not recommend their use in RC structure elements subjected to compressive loads. Currently, there is no standard method to determine the compressive characteristics of FRP bars. This article presents a new type of GFRP bars designed specially to support compressive loads: they have additional winding GFRP layers around the longitudinal fibers. An exhaustive experimental study was carried out to obtain compressive properties of the bars: compressive strength, Young’s modulus and stress-strain relation. After post-processing the experimental results of the study, this paper showed compressive strength between 50% and 60% of tensile strength, which allows employing the bars as internal reinforcement in RC structures. Their obtained Young’s modulus is the same in both tensile and compression, which enables the linear stress-strain relation to be extended to the entire range of deformations. This is most advantageous for structural analysis procedures in the linear elastic regime. Finally, based on the experimental results of failure modes, some limitations about the cross-sectional area or the slenderness were proposed for the use as internal reinforcing in RC structures, which helps the researchers in the design procedure for members reinforced with FRP bars.

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Table of Contents

  • Experimental behavior of novel GFRP reinforcing bars under compressive loads
    • 1. Introduction
      • 1.1. Case study: new GFRP bars
    • 2. Method
      • 2.1. Specimen dimensions
      • 2.2. Test procedure
    • 3. Results and Discussion
      • 3.1. Mechanical compression test results
      • 3.2. Discussion
        • a) Compressive strength
        • b) Modulus of elasticity.
        • c) Mechanics of failure
        • d) Spacing/unbraced length
    • 4. Conclusions

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