中文版 | English
Title

Confinement mechanism of FRP-confined concrete-encased cross-shaped steel columns

Author
Corresponding AuthorYu, Tao
Publication Years
2023-02-01
DOI
Source Title
ISSN
0141-0296
EISSN
1873-7323
Volume276
Abstract
Fibre-reinforced polymer (FRP)-confined concrete-encased cross-shaped steel columns (FCCSCs) are an emerging type of hybrid columns. In an FCCSC, the concrete is subjected to combined confinement from the steel section and the FRP tube, leading to an enhanced load capacity and excellent ductility of the column. While several recent experimental studies have demonstrated the excellent structural performance of FCCSCs, the complex confinement mechanism behind their structural behaviour has not been clarified or thoroughly examined. This paper presents a comprehensive study aiming to investigate the confinement mechanism of FCCSCs. In this paper, the experimental observations of FCCSCs are first summarized, followed by three-dimensional FE modelling of the columns. The FE models, after being verified against the test results in various aspects, are used for a systematic parametric study. In this study, the complex interaction between the three components of FCCSCs (i.e., FRP tube, steel section and concrete) is illustrated explicitly and the effects of key parameters (i.e., flange width, flange thickness, web thickness and FRP tube thickness) are examined separately and thoroughly, leading to an in-depth understanding of the confinement mechanism of FCCSCs. In particular, through the ex-amination on the distribution of steel flange-to-concrete normal pressure, it is shown quantitatively that the variations of the dimensions of the steel section in a practically wide range have only marginal effects on its confinement to the concrete, while the increase of FRP tube thickness tends to reduce the confinement effect from the steel section.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Others
Funding Project
Australian Research Council[DP170102992] ; Hong Kong Research Grants Council[15222321]
WOS Research Area
Engineering
WOS Subject
Engineering, Civil
WOS Accession No
WOS:000902049300005
Publisher
ESI Research Field
ENGINEERING
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/424751
DepartmentDepartment of Ocean Science and Engineering
Affiliation
1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
2.Univ Wollongong, Fac Engn & Informat Sci, Sch Civil Min & Environm Engn, Wollongong, Australia
3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
4.Huazhong Univ Sci & Technol, Sch Civil & Hydraul Engn, Wuhan, Peoples R China
Recommended Citation
GB/T 7714
Huang, Le,Yu, Tao,Lin, Guan,et al. Confinement mechanism of FRP-confined concrete-encased cross-shaped steel columns[J]. ENGINEERING STRUCTURES,2023,276.
APA
Huang, Le,Yu, Tao,Lin, Guan,&Zhang, Shi-Shun.(2023).Confinement mechanism of FRP-confined concrete-encased cross-shaped steel columns.ENGINEERING STRUCTURES,276.
MLA
Huang, Le,et al."Confinement mechanism of FRP-confined concrete-encased cross-shaped steel columns".ENGINEERING STRUCTURES 276(2023).
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