A comparative study on different BFRP rebar design methodologies

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Title: A comparative study on different BFRP rebar design methodologies
Authors: Antonopoulou, Sofia
McNally, Ciaran
Byrne, Greg
Permanent link: http://hdl.handle.net/10197/9545
Date: 30-Aug-2018
Abstract: This study compares the physical properties and tensile behaviour of two different basalt fibre reinforced polymer (BFRP) rebar designs. Both types are developed using basalt fibres and epoxy resin as reinforcement and matrix respectively; composites with a constant cross section of 8 mm diameter are manufactured using a vacuum assisted resin infusion technique. The first configuration consists of eight braided layers at various angles, while the second one combines a unidirectional core with four outer braided layers. The latter hybrid design is introduced to improve the elastic modulus of braided BFRP reinforcement used in concrete structures. Tensile performance of all BFRP rebars produced in UCD laboratory is numerically and experimentally evaluated, and results for both approaches are compared. The effective longitudinal in-plane modulus and the fibre volume fractions (φf) of each sample is calculated using the classical laminate theory and then, tensile tests are performed in accordance to the B2_ACI 440.3R-04 standard to experimentally validate the numerical results. Initial findings indicate that the elastic modulus of BFRP rebar can be enhanced by combining braiding with a unidirectional fibre core while a sufficient tensile strength is obtained, but additional research towards an optimal hybrid design is required.
Funding Details: European Commission Horizon 2020
Type of material: Conference Publication
Publisher: CERAI
Keywords: BFRP rebarsBraiding techniqueTensile behaviourUnidirectional fibresCharacterisation of FRP materials
Other versions: http://www.cerai.net/
Language: en
Status of Item: Peer reviewed
Conference Details: The 2018 Civil Engineering Research in Ireland Conference (CERI 2018), Dublin, Ireland, August 29-30 2018
Appears in Collections:Civil Engineering Research Collection
TRUSS-ITN Research Collection

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