Theoretical model for double-skinned concrete-filled-steel-tubular columns with external confinement

Dong, Chun Xiao and Ho, Johnny Ching Ming (2015) Theoretical model for double-skinned concrete-filled-steel-tubular columns with external confinement. Journal of Civil Engineering and Management, 21 5: 666-676. doi:10.3846/13923730.2014.893913

Author Dong, Chun Xiao
Ho, Johnny Ching Ming
Title Theoretical model for double-skinned concrete-filled-steel-tubular columns with external confinement
Journal name Journal of Civil Engineering and Management   Check publisher's open access policy
ISSN 1822-3605
Publication date 2015-07-04
Year available 2015
Sub-type Article (original research)
DOI 10.3846/13923730.2014.893913
Open Access Status
Volume 21
Issue 5
Start page 666
End page 676
Total pages 11
Place of publication Vilniaus Gedimino Technikos Universitetas
Publisher Vilnius, Lithuania
Collection year 2016
Language eng
Abstract Recent advances in the production of super-fine cement and filler technology has made the production of high-strength concrete (HSC) of 120 MPa practicable in the industry. Nonetheless, the application of such HSC in real construction is still limited. One of the reasons that inhibits the use of HSC is the brittleness, which causes HSC structures to fail explosively if the concrete confinement is not adequate. The traditional method of installing transverse steel as confinement is not feasible in HSC structures, as the steel will be too congested to ensure proper concrete placing. To overcome the problem, double-skinned high-strength concrete-filled-steel-tubular (HSCFST) columns has been advocated, which could provide large, continuous and uniform confinement to HSC. However, a major shortcoming of the double-skinned HSCFST columns is the imperfect interface bonding that occurs at the elastic stage that reduces the elastic strength and stiffness of columns. To improve the situation, the authors have verified previously that using external steel rings on the outer steel tube can successfully restrict the dilation of HSCFST columns and thus restore an intact interface bonding condition. As a continued study, the authors will in this paper develop a theoretical model for predicting the uni-axial load-carrying capacity of doubled-skinned HSCFST columns.
Keyword Columns
Double-skin tubular
External confinement
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2016 Collection
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Created: Fri, 29 May 2015, 11:25:05 EST by Johnny Ho on behalf of School of Civil Engineering