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^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

28 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. © 2022 Elsevier Ltd.

Original language	English
Article number	115268
Journal	Composite Structures
Volume	285
Online published	15 Jan 2022
DOIs	https://doi.org/10.1016/j.compstruct.2022.115268
Publication status	Published - 1 Apr 2022
Externally published	Yes

Funding

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).

Research Keywords

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

Access Output

10.1016/j.compstruct.2022.115268

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{8f965e0c94a4404ebcb29ca8f15ef8de,

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. {\textcopyright} 2022 Elsevier Ltd.",

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

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

year = "2022",

month = apr,

day = "1",

doi = "10.1016/j.compstruct.2022.115268",

language = "English",

volume = "285",

journal = "Composite Structures",

issn = "0263-8223",

publisher = "Elsevier B.V.",

}

TY - JOUR

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

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. © 2022 Elsevier Ltd.

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. © 2022 Elsevier Ltd.

KW - Compression

KW - fiber-reinforced polymer (FRP)

KW - FRP micro-bar

KW - Permanent formwork

KW - Tubular column

KW - ultra-high-performance concrete (UHPC)

UR - http://www.scopus.com/inward/record.url?scp=85123023813&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85123023813&origin=recordpage

U2 - 10.1016/j.compstruct.2022.115268

DO - 10.1016/j.compstruct.2022.115268

M3 - RGC 21 - Publication in refereed journal

AN - SCOPUS:85123023813

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

Funding

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this