Structural Behaviour of Prefabricated Composite Cold-Formed Steel and Timber Flooring Systems

Karki, D; Far, H; Nejadi, S

Structural Behaviour of Prefabricated Composite Cold-Formed Steel and Timber Flooring Systems

Karki, D Far, H

Nejadi, S

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Publisher:: American Society of Civil Engineers
Publication Type:: Journal Article
Citation:: Journal of Structural Engineering, 2023, 149, (12)
Issue Date:: 2023-12-27

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Field	Value	Language
dc.contributor.author	Karki, D
dc.contributor.author	Far, H https://orcid.org/0000-0003-3480-6582
dc.contributor.author	Nejadi, S
dc.date.accessioned	2023-10-02T05:01:16Z
dc.date.available	2023-10-02T05:01:16Z
dc.date.issued	2023-12-27
dc.identifier.citation	Journal of Structural Engineering, 2023, 149, (12)
dc.identifier.issn	0733-9445
dc.identifier.uri	http://hdl.handle.net/10453/172418
dc.description.abstract	In this study, structural performance of a new type of lightweight composite cold-formed steel and timber (CFST) flooring system has been investigated by conducting four-point bending tests on thirteen specimens. A bare cold-formed steel system without timber sheathing was also tested to provide a benchmark response to which the strength and stiffness of the composite system were compared. This paper presents key findings on the flooring system’s structural behaviour and performance parameters, such as ultimate bending capacity, load-deflection response, load-slip response and failure modes, by categorising thirteen specimens into four sub-groups based on shear connector types and spacings. In the proposed composite CFST flooring system, 45mm thick structural plywood panels were connected to the 2.4mm thick cold-formed steel C-section joist using self-drilling screws, coach screws, and nuts and bolts. The performance of different types of shear connectors on the composite action is experimentally investigated and compared with the theoretical plastic section. Furthermore, the load-carrying capacity, effective bending stiffness, and deflection of composite CFST beams were computed theoretical using elastic theory and compared to experimental results, which showed good agreement.
dc.language	en
dc.publisher	American Society of Civil Engineers
dc.relation.ispartof	Journal of Structural Engineering
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0905 Civil Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering
dc.subject.classification	Civil Engineering
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4016 Materials engineering
dc.title	Structural Behaviour of Prefabricated Composite Cold-Formed Steel and Timber Flooring Systems
dc.type	Journal Article
utslib.citation.volume	149
utslib.for	0905 Civil Engineering
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical Engineering
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	open_access	*
pubs.consider-herdc	true
dc.date.updated	2023-10-02T05:01:15Z
pubs.issue	12
pubs.publication-status	Accepted
pubs.volume	149
utslib.citation.issue	12

Abstract:

In this study, structural performance of a new type of lightweight composite cold-formed steel and timber (CFST) flooring system has been investigated by conducting four-point bending tests on thirteen specimens. A bare cold-formed steel system without timber sheathing was also tested to provide a benchmark response to which the strength and stiffness of the composite system were compared. This paper presents key findings on the flooring system’s structural behaviour and performance parameters, such as ultimate bending capacity, load-deflection response, load-slip response and failure modes, by categorising thirteen specimens into four sub-groups based on shear connector types and spacings. In the proposed composite CFST flooring system, 45mm thick structural plywood panels were connected to the 2.4mm thick cold-formed steel C-section joist using self-drilling screws, coach screws, and nuts and bolts. The performance of different types of shear connectors on the composite action is experimentally investigated and compared with the theoretical plastic section. Furthermore, the load-carrying capacity, effective bending stiffness, and deflection of composite CFST beams were computed theoretical using elastic theory and compared to experimental results, which showed good agreement.

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http://hdl.handle.net/10453/172418