Comparative study on square and rectangular UHPFRC-Filled steel tubular (CFST) columns under axial compression

Yang, Y; Wu, C; Liu, Z; Qin, Y; Wang, W

Comparative study on square and rectangular UHPFRC-Filled steel tubular (CFST) columns under axial compression

Yang, Y Wu, C

Liu, Z Qin, Y Wang, W

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Structures, 2021, 34, pp. 2054-2068
Issue Date:: 2021-12-01

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Field	Value	Language
dc.contributor.author	Yang, Y
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Liu, Z
dc.contributor.author	Qin, Y
dc.contributor.author	Wang, W https://orcid.org/0000-0003-2782-8652
dc.date.accessioned	2022-03-07T03:46:43Z
dc.date.available	2022-03-07T03:46:43Z
dc.date.issued	2021-12-01
dc.identifier.citation	Structures, 2021, 34, pp. 2054-2068
dc.identifier.issn	2352-0124
dc.identifier.issn	2352-0124
dc.identifier.uri	http://hdl.handle.net/10453/155010
dc.description.abstract	This paper presents an experimental study on the axial performance of square/rectangular concrete-filled steel tubular (CFST) columns. A total of 34 specimens, classified as four groups, were fabricated and tested under uniaxial compression. The failure modes, axial stress–strain curves, ultimate axial stress, and ductility were analysed in detail considering the effect of the steel ratio, steel fibre addition, concrete type, cross-section type, and size of the specimens. Further, the confinement index (ξ) and strength index (SI) was discussed. The obtained findings revealed that the ultimate axial stress of CFST columns was increased by increasing the thickness of the steel tube and adding steel fibres to the concrete mixture. When the steel ratio, steel tube thickness, and specimen height were the same, the type of cross-section (the square and the rectangular section) exhibited an insignificant effect on the axial stress–strain of the CFST column. Finally, a formula was proposed to estimate the ultimate axial stress of both square and rectangular CFST columns, with the concrete core strength ranging from 70 MPa to 150 MPa.
dc.language	English
dc.publisher	Elsevier
dc.relation	National Natural Science Foundation of China51978186
dc.relation.ispartof	Structures
dc.relation.isbasedon	10.1016/j.istruc.2021.08.104
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.title	Comparative study on square and rectangular UHPFRC-Filled steel tubular (CFST) columns under axial compression
dc.type	Journal Article
utslib.citation.volume	34
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-03-07T03:46:34Z
pubs.publication-status	Published
pubs.volume	34

Abstract:

This paper presents an experimental study on the axial performance of square/rectangular concrete-filled steel tubular (CFST) columns. A total of 34 specimens, classified as four groups, were fabricated and tested under uniaxial compression. The failure modes, axial stress–strain curves, ultimate axial stress, and ductility were analysed in detail considering the effect of the steel ratio, steel fibre addition, concrete type, cross-section type, and size of the specimens. Further, the confinement index (ξ) and strength index (SI) was discussed. The obtained findings revealed that the ultimate axial stress of CFST columns was increased by increasing the thickness of the steel tube and adding steel fibres to the concrete mixture. When the steel ratio, steel tube thickness, and specimen height were the same, the type of cross-section (the square and the rectangular section) exhibited an insignificant effect on the axial stress–strain of the CFST column. Finally, a formula was proposed to estimate the ultimate axial stress of both square and rectangular CFST columns, with the concrete core strength ranging from 70 MPa to 150 MPa.

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http://hdl.handle.net/10453/155010