Theoretical study on the relationship between the ultimate strength of confined concrete and fibre orientation

Ezgi Kaya, Dilum Fernando

Research output: Contribution to conferencePaperpeer-review

Abstract / Description of output

In recent years, concrete-filled fibre-reinforced polymer tubes (CFFTs) have become an attractive formof hybrid structural members due to their high strength-to-weight ratio, excellent corrosion resistanceand good seismic performance., Fibre-reinforced polymer (FRP) tubes in CFFT columns can be usedas stay-in-place formwork, thus CFFTs can be constructed rapidly. For higher quality, the FRP tubes ofCFFTs are typically manufactured through a filament winding process. In such a filament windingprocess, fibre angles are controlled to a pre-determined value. Fibre angles determine the mechanicalproperties of the FRP tube in hoop and axial direction. While few experimental studies have beenconducted on the behaviour of CFFTs with different fibre angles, no conclusions were derived on theoptimal fibre angle to be used in CFFT columns. This paper presents a theoretical investigation todetermine the fibre angle effect on ultimate strength of confined concrete under biaxial loadingconditions. It was found that the optimal strength of a CFFT column is achieved when the fibre angle ofthe FRP tube is 4 degrees to the hoop direction. The predictions of the theoretical study are alsocompared with the experimental findings in published literature.

Original languageEnglish
Pages99-104
Number of pages6
Publication statusPublished - 2019
Event9th Biennial Conference on Advanced Composites in Construction 2019, ACIC 2019 - Birmingham, United Kingdom
Duration: 3 Sept 20195 Sept 2019

Conference

Conference9th Biennial Conference on Advanced Composites in Construction 2019, ACIC 2019
Country/TerritoryUnited Kingdom
CityBirmingham
Period3/09/195/09/19

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