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Effect of steel fibres and expansive agents on compressive behaviour of circular CFST columns

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dc.contributor.authorHu, X.
dc.contributor.authorSu, T.H.
dc.contributor.authorZeng, J.J.
dc.contributor.authorLong, Y.L.
dc.contributor.authorWang, J.S.
dc.contributor.authorOuyang, Y.
dc.date.issued2024
dc.description.abstractConcrete filled steel tube columns (CFSTCs) are commonly used in large-span bridges and high-rise buildings. As the shrinkage of concrete may lead to significant degradation in the mechanical performance of CFSTCs, expansive concrete or fibre reinforced concrete is usually employed to improve the mechanical performance of CFSTCs. This study presents an experimental study on the combined effects of expansive agents and steel fibres on the axial compressive behaviour of circular CFSTCs. 13 CFSTCs were designed and manufactured using concrete mixes with varying expansive agent rates and steel fibre contents. The time-dependent expansive behaviours of the specimens were monitored during the concrete curing period. Then, the 13 specimens were tested under axial compression load. The failure modes, compression load-axial strain relationship, hoop strain and axial strain relationship, and ductility were investigated. The results demonstrated that the combined addition of expansive agents and steel fibres would substantially improve the compressive strength and ductile behaviour of CFSTCs.
dc.identifier.citationCase Studies in Construction Materials, 2024; 20:1-15
dc.identifier.doi10.1016/j.cscm.2023.e02789
dc.identifier.issn2214-5095
dc.identifier.urihttps://hdl.handle.net/11541.2/37217
dc.language.isoen
dc.publisherElsevier BV
dc.relation.fundingNational Natural Science Foundation of China 52178277
dc.relation.fundingNatural Science Foundation of Guangdong Province 2021B1515020029
dc.relation.fundingGuangzhou Science and Technology Department 201904010164
dc.rightsCopyright 2023 The Author(s). This is an open access article under the CC BY-NC-ND license. (http://creativecommons.org/licenses/by-nc-nd/4.0/)
dc.source.urihttps://doi.org/10.1016/j.cscm.2023.e02789
dc.subjectsteel fibre
dc.subjectexpansive agent
dc.subjectconcrete filled steel tube
dc.subjectaxial compression
dc.subjectexpansive concrete
dc.titleEffect of steel fibres and expansive agents on compressive behaviour of circular CFST columns
dc.typeJournal article
pubs.publication-statusPublished
ror.fileinfo12280140260001831 13280150290001831 Open Access Published Version
ror.mmsid9916819231101831

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