Flexural behavior and bond coefficient of BFRP bar reinforced normal and high strength concrete beams

Omar M. Mostafa, Muhammad K. Rahman*, Mesfer M. Al-Zahrani, Saheed K. Adekunle, Mohammed A. Al-Osta, Syed K. Najamuddin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Basalt fiber-reinforced polymer (BFRP) bars are emerging as potential non-metallic reinforcements for concrete structures due to the wide availability of their raw materials, their environmentally friendly manufacturing process, and their excellent mechanical and durability properties. This paper focuses on the flexural and deflection response of normal and high-strength concrete (HSC) beams reinforced with BFRP bars. A total of fifteen simply supported concrete beams were tested under four-point loading on a flexural span of 2.5 m. The study parameters were the reinforcement ratio, BFRP bar size, concrete strength and bar type (BFRP, GFRP and Steel). The experimental results were compared to ACI 440.1R-15 predictions. The prediction of ultimate moment capacity was in good agreement with the experimental result, while the cracking moment was overestimated. Furthermore, the mid-span deflection was significantly underestimated at service and ultimate loads. Modification in the empirical equations was proposed to enhance the predictions of mid-span deflection at service load. The bond coefficient kb used for predicting the crack width was estimated at 0.89 and 1.12 for BFRP-reinforced normal and high-strength beams.

Original languageEnglish
Article number132896
JournalConstruction and Building Materials
Volume401
DOIs
StatePublished - 19 Oct 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

  • BFRP bars
  • Bond coefficient
  • Deflection
  • Flexural response
  • HSC

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science

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