Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns: Concept and compressive behavior

Jun Jie Zeng; Shu Peng Chen; Kai Di Peng; Jian Guo Dai

doi:10.1016/j.compstruct.2022.115268

Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns: Concept and compressive behavior

Jun Jie Zeng, Shu Peng Chen, Kai Di Peng, Jian Guo Dai

Research output: Journal article publication › Journal article › Academic research › peer-review

26 Citations (Scopus)

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.

Original language	English
Article number	115268
Journal	Composite Structures
Volume	285
DOIs	https://doi.org/10.1016/j.compstruct.2022.115268
Publication status	Published - 1 Apr 2022

Keywords

Compression
fiber-reinforced polymer (FRP)
FRP micro-bar
Permanent formwork
Tubular column
ultra-high-performance concrete (UHPC)

ASJC Scopus subject areas

Ceramics and Composites
Civil and Structural Engineering

More information

10.1016/j.compstruct.2022.115268

Cite this

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title = "Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns: Concept and compressive behavior",

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.",

keywords = "Compression, fiber-reinforced polymer (FRP), FRP micro-bar, Permanent formwork, Tubular column, ultra-high-performance concrete (UHPC)",

author = "Zeng, {Jun Jie} and Chen, {Shu Peng} and Peng, {Kai Di} and Dai, {Jian Guo}",

note = "Funding Information: The authors acknowledge the financial support received from the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0503), the Hong Kong Innovation and Technology Fund (No. ITS/077/18FX), the Guangzhou Science and Technology Department (No. 201904010163), the Natural Science Foundation of Guangdong Province (No. 2019A1515011637, 2021A0505060008), the University of Macau (File no. UMMTP2020-MYSP-003), as well as the Association for Promotion of Science and Technology of Macau and the Office of China National Postdoctoral Council (File no. AM2020002). Publisher Copyright: {\textcopyright} 2022",

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T1 - Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns

T2 - Concept and compressive behavior

AU - Zeng, Jun Jie

AU - Chen, Shu Peng

AU - Peng, Kai Di

AU - Dai, Jian Guo

N1 - Funding Information: The authors acknowledge the financial support received from the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0503), the Hong Kong Innovation and Technology Fund (No. ITS/077/18FX), the Guangzhou Science and Technology Department (No. 201904010163), the Natural Science Foundation of Guangdong Province (No. 2019A1515011637, 2021A0505060008), the University of Macau (File no. UMMTP2020-MYSP-003), as well as the Association for Promotion of Science and Technology of Macau and the Office of China National Postdoctoral Council (File no. AM2020002). Publisher Copyright: © 2022

PY - 2022/4/1

Y1 - 2022/4/1

N2 - 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.

AB - 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.

KW - Compression

KW - fiber-reinforced polymer (FRP)

KW - FRP micro-bar

KW - Permanent formwork

KW - Tubular column

KW - ultra-high-performance concrete (UHPC)

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DO - 10.1016/j.compstruct.2022.115268

M3 - Journal article

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SN - 0263-8223

VL - 285

JO - Composite Structures

JF - Composite Structures

M1 - 115268

ER -

Novel FRP micro-bar reinforced UHPC permanent formwork for circular columns: Concept and compressive behavior

Abstract

Keywords

ASJC Scopus subject areas

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