Experimental study on residual axial bearing capacity of UHPFRC-filled steel tubes after lateral impact loading

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

Experimental study on residual axial bearing capacity of UHPFRC-filled steel tubes after lateral impact loading

Mi, Y Liu, Z Wang, W

Yang, Y Wu, C

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Publisher:: ELSEVIER SCIENCE INC
Publication Type:: Journal Article
Citation:: Structures, 2020, 26, pp. 549-561
Issue Date:: 2020-08-01

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Field	Value	Language
dc.contributor.author	Mi, Y
dc.contributor.author	Liu, Z
dc.contributor.author	Wang, W https://orcid.org/0000-0003-2782-8652
dc.contributor.author	Yang, Y
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.date.accessioned	2020-12-31T01:25:58Z
dc.date.available	2020-12-31T01:25:58Z
dc.date.issued	2020-08-01
dc.identifier.citation	Structures, 2020, 26, pp. 549-561
dc.identifier.issn	2352-0124
dc.identifier.issn	2352-0124
dc.identifier.uri	http://hdl.handle.net/10453/145017
dc.description.abstract	© 2020 Institution of Structural Engineers Concrete-filled steel tube (CFST) has been widely used in civil engineering. Numerous studies have shown that concrete-filled double-skin steel tube (CFDST) columns exhibit satisfactory mechanical properties under various loading conditions. Furthermore, ultra-high performance fiber-reinforced concrete (UHPFRC) has been developed as a prominent representative of new construction materials. This study investigates the residual bearing capacities of 10 concrete-filled steel tube specimens (three CFST columns and seven CFDST columns) after impact loading. The investigated parameters include the steel ratio, the concrete type, the section form, axial load ratio, the impact energy and the presence/absence of impact load. The results demonstrate that, when the inner steel tube thicknesses are identical, increasing the steel ratio from 0.296 to 0.467 (the outer steel tube thickness increases from 5 mm to 8 mm) can effectively improve the residual performance. For the non-impacted specimens, the bearing capacity of the CFDST columns is increased by 47.1% as the concrete type is changed from NSC to UHPFRC. For the impacted specimens, due to the influence of the test setup and other reasons, the concrete type has only a slight influence on the residual performance of CFDST columns; however, it has a substantial influence on the residual performance of the CFST columns. Furthermore, with the concrete type in the CFST columns changing from NSC to UHPFRC, the residual performance of CFST columns can be significantly enhanced.
dc.language	English
dc.publisher	ELSEVIER SCIENCE INC
dc.relation.ispartof	Structures
dc.relation.isbasedon	10.1016/j.istruc.2020.04.032
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.title	Experimental study on residual axial bearing capacity of UHPFRC-filled steel tubes after lateral impact loading
dc.type	Journal Article
utslib.citation.volume	26
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
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
utslib.copyright.status	closed_access	*
dc.date.updated	2020-12-31T01:25:30Z
pubs.publication-status	Published
pubs.volume	26

Abstract:

© 2020 Institution of Structural Engineers Concrete-filled steel tube (CFST) has been widely used in civil engineering. Numerous studies have shown that concrete-filled double-skin steel tube (CFDST) columns exhibit satisfactory mechanical properties under various loading conditions. Furthermore, ultra-high performance fiber-reinforced concrete (UHPFRC) has been developed as a prominent representative of new construction materials. This study investigates the residual bearing capacities of 10 concrete-filled steel tube specimens (three CFST columns and seven CFDST columns) after impact loading. The investigated parameters include the steel ratio, the concrete type, the section form, axial load ratio, the impact energy and the presence/absence of impact load. The results demonstrate that, when the inner steel tube thicknesses are identical, increasing the steel ratio from 0.296 to 0.467 (the outer steel tube thickness increases from 5 mm to 8 mm) can effectively improve the residual performance. For the non-impacted specimens, the bearing capacity of the CFDST columns is increased by 47.1% as the concrete type is changed from NSC to UHPFRC. For the impacted specimens, due to the influence of the test setup and other reasons, the concrete type has only a slight influence on the residual performance of CFDST columns; however, it has a substantial influence on the residual performance of the CFST columns. Furthermore, with the concrete type in the CFST columns changing from NSC to UHPFRC, the residual performance of CFST columns can be significantly enhanced.

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http://hdl.handle.net/10453/145017