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Shear behaviour of inorganic polymer concrete beams reinforced with basalt FRP bars and stirrups

Fan, X; Zhou, Z; Tu, W; Zhang, M; (2021) Shear behaviour of inorganic polymer concrete beams reinforced with basalt FRP bars and stirrups. Composite Structures , 255 , Article 112901. 10.1016/j.compstruct.2020.112901. Green open access

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Abstract

Inorganic polymer concrete (IPC) reinforced with basalt fibre reinforced polymer (BFRP) was proposed as a promising substitute of conventional reinforced concrete for structures to enhance their sustainability and durability. This paper, for the first time, presents a systematic study, experimental, theoretical and numerical, of shear behaviour of IPC beams reinforced with BFRP bars and stirrups considering the effects of stirrup spacing (S = 80, 100 and 150 mm) and shear span-to-depth ratio (λ = 1.5, 2.0 and 2.5). Result indicates that all BFRP-IPC beams fail in shear as a result of BFRP stirrup rupture and shear-compression failure. Compared to S, λ has a more pronounced influence on shear performance of BFRP reinforced IPC beams, with a maximum reduction of ultimate shear load by 29.4%. The simulation results show good agreement with experimental data, while the theoretical predictions according to existing design provisions for FRP reinforced concrete have a discrepancy of more than 30% with experiments due to lack of consideration of λ. Modified equations taking into account the effect of λ were then derived and used to predict the shear capacity of BFRP reinforced IPC beams, which agrees well with experimental data with an average discrepancy of only around 5%.

Type: Article
Title: Shear behaviour of inorganic polymer concrete beams reinforced with basalt FRP bars and stirrups
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.compstruct.2020.112901
Publisher version: https://doi.org/10.1016/j.compstruct.2020.112901
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Geopolymer concrete, FRP, Shear capacity, Theoretical predictions, Finite element analysis
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10108803
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