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Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns: Concept and compressive behavior
Zeng, Jun Jie1,2; Chen, Shu Peng1; Peng, Kai Di3; Dai, Jian Guo3
2022-04-01
Source PublicationComposite Structures
ISSN0263-8223
Volume285
Abstract

In this study, a novel form of tubular permanent formwork that is made of ultra-high-performance concrete (UHPC) internally reinforced with fiber-reinforced polymer (FRP) micro-bars (herein referred to as FRP-UHPC tubular permanent formwork or simply FRP-UHPC tubular column) is developed. The axial compression test results of FRP-UHPC tubular columns with and without in-filled concrete are presented and discussed. Effects of the FRP micro-bar spiral pitch, the steel fiber addition in the UHPC, the tube thickness and the presence of external FRP confinment are investigated. The test results confirmed that the FRP-UHPC tubular columns have an excellent compressive strength, and the strength and ductility of existing concrete columns jacketed with an FRP-UHPC composite tube are substantially enhanced due to the confinement and axial contribution of the FRP-UHPC tube. The proposed FRP micro-bar-reinforced UHPC composite tubes are attractive in structural applications as pipelines or permanent formworks for columns, as well as external jackets (can be prefabricated in the form of two halves of composites tubes) for strengthening deteriorated reinforced concrete columns.

KeywordCompression Fiber-reinforced Polymer (Frp) Frp Micro-bar Permanent Formwork Tubular Column Ultra-high-performance Concrete (Uhpc)
DOI10.1016/j.compstruct.2022.115268
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaMechanics ; Materials Science
WOS SubjectMechanics ; Materials Science, Composites
WOS IDWOS:000766129800001
Scopus ID2-s2.0-85123023813
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorDai, Jian Guo
Affiliation1.Department of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, China
2.Department of Civil and Environmental Engineering, University of Macau, Macau, China
3.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, Hong Kong
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Zeng, Jun Jie,Chen, Shu Peng,Peng, Kai Di,et al. Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns: Concept and compressive behavior[J]. Composite Structures,2022,285.
APA Zeng, Jun Jie,Chen, Shu Peng,Peng, Kai Di,&Dai, Jian Guo.(2022).Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns: Concept and compressive behavior.Composite Structures,285.
MLA Zeng, Jun Jie,et al."Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns: Concept and compressive behavior".Composite Structures 285(2022).
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