Bending and Shear Behaviour of Waste Rubber Concrete-Filled FRP Tubes with External Flanges

An innovative beam concept made from hollow FRP tube with external flanges and filled with crumbed rubber concrete was investigated with respect to bending and shear. The performance of the rubberised-concrete-filled specimens was then compared with hollow and normal-concrete-filled tubes. A compari...

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Bibliographic Details
Published in:Polymers 2021-07, Vol.13 (15), p.2500
Main Authors: Ferdous, Wahid, Manalo, Allan, AlAjarmeh, Omar S., Zhuge, Yan, Mohammed, Ali A., Bai, Yu, Aravinthan, Thiru, Schubel, Peter
Format: Article
Language:English
Subjects:
Aggregates
Bending
Cement
Concrete
Finite element method
Flanges
Load
Manufacturing
Mechanical properties
Polymers
Rubber
Scrap
Shear properties
Shear strain
Shear strength
Shear tests
Stiffness
Strain gauges
Tubes
Waste materials
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Summary:An innovative beam concept made from hollow FRP tube with external flanges and filled with crumbed rubber concrete was investigated with respect to bending and shear. The performance of the rubberised-concrete-filled specimens was then compared with hollow and normal-concrete-filled tubes. A comparison between flanged and non-flanged hollow and concrete-filled tubes was also implemented. Moreover, finite element simulation was conducted to predict the fundamental behaviour of the beams. The results showed that concrete filling slightly improves bending performance but significantly enhances the shear properties of the beam. Adding 25% of crumb rubber in concrete marginally affects the bending and shear performance of the beam when compared with normal-concrete-filled tubes. Moreover, the stiffness-to-FRP weight ratio of a hollow externally flanged round tube is equivalent to that of a concrete-filled non-flanged round tube. The consideration of the pair-based contact surface between an FRP tube and infill concrete in linear finite element modelling predicted the failure loads within a 15% margin of difference.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym13152500