Seismic performance of repaired RC columns

K. S. Youm, Hak Eun Lee, S. Choi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Steel or fibre-reinforced polymer (FRP) composite jackets have been utilised in retrofitting reinforced concrete (RC) bridge columns and have shown to be effective in enhancing seismic performance of the structures. However, to date, only a few researches have been conducted on the behavioural characteristics of the repaired RC columns using steel or FRP jackets. In the present paper, the comparative performance of repaired RC columns using steel and CFRP jackets is presented. Also, the effect of transverse reinforcement ratio on the behaviour of the steel and the CFRP repairing is investigated. Monotonic and cyclic load tests are conducted on nine RC column specimens with different repairing strategies and transverse reinforcement ratios to compare the ultimate and the hysteretic behaviours. From the tests, it is observed that both steel and CFRP jacket repairing can significantly increase the ductility and the ultimate capacity of damaged columns. Notably, the steel jacket repaired columns show better energy dissipation capacity than the CFRP jacket repaired columns for columns with lower transverse reinforcement ratio. It is also observed that the location of plastic hinge region goes up as the transverse reinforcement ratio of RC columns increases.

Original languageEnglish
Pages (from-to)267-276
Number of pages10
JournalMagazine of Concrete Research
Volume58
Issue number5
DOIs
Publication statusPublished - 2006 Jun 9

Fingerprint

Steel
Reinforced concrete
Carbon fiber reinforced plastics
Reinforcement
Polymers
Cyclic loads
Fibers
Concrete bridges
Retrofitting
Hinges
Ductility
Energy dissipation
Plastics
carbon fiber reinforced plastic
Composite materials

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

Cite this

Seismic performance of repaired RC columns. / Youm, K. S.; Lee, Hak Eun; Choi, S.

In: Magazine of Concrete Research, Vol. 58, No. 5, 09.06.2006, p. 267-276.

Research output: Contribution to journalArticle

Youm, K. S. ; Lee, Hak Eun ; Choi, S. / Seismic performance of repaired RC columns. In: Magazine of Concrete Research. 2006 ; Vol. 58, No. 5. pp. 267-276.
@article{e3758209f3214d3081a71b4c16097ce8,
title = "Seismic performance of repaired RC columns",
abstract = "Steel or fibre-reinforced polymer (FRP) composite jackets have been utilised in retrofitting reinforced concrete (RC) bridge columns and have shown to be effective in enhancing seismic performance of the structures. However, to date, only a few researches have been conducted on the behavioural characteristics of the repaired RC columns using steel or FRP jackets. In the present paper, the comparative performance of repaired RC columns using steel and CFRP jackets is presented. Also, the effect of transverse reinforcement ratio on the behaviour of the steel and the CFRP repairing is investigated. Monotonic and cyclic load tests are conducted on nine RC column specimens with different repairing strategies and transverse reinforcement ratios to compare the ultimate and the hysteretic behaviours. From the tests, it is observed that both steel and CFRP jacket repairing can significantly increase the ductility and the ultimate capacity of damaged columns. Notably, the steel jacket repaired columns show better energy dissipation capacity than the CFRP jacket repaired columns for columns with lower transverse reinforcement ratio. It is also observed that the location of plastic hinge region goes up as the transverse reinforcement ratio of RC columns increases.",
author = "Youm, {K. S.} and Lee, {Hak Eun} and S. Choi",
year = "2006",
month = "6",
day = "9",
doi = "10.1680/macr.2006.58.5.267",
language = "English",
volume = "58",
pages = "267--276",
journal = "Magazine of Concrete Research",
issn = "0024-9831",
publisher = "ICE Publishing Ltd.",
number = "5",

}

TY - JOUR

T1 - Seismic performance of repaired RC columns

AU - Youm, K. S.

AU - Lee, Hak Eun

AU - Choi, S.

PY - 2006/6/9

Y1 - 2006/6/9

N2 - Steel or fibre-reinforced polymer (FRP) composite jackets have been utilised in retrofitting reinforced concrete (RC) bridge columns and have shown to be effective in enhancing seismic performance of the structures. However, to date, only a few researches have been conducted on the behavioural characteristics of the repaired RC columns using steel or FRP jackets. In the present paper, the comparative performance of repaired RC columns using steel and CFRP jackets is presented. Also, the effect of transverse reinforcement ratio on the behaviour of the steel and the CFRP repairing is investigated. Monotonic and cyclic load tests are conducted on nine RC column specimens with different repairing strategies and transverse reinforcement ratios to compare the ultimate and the hysteretic behaviours. From the tests, it is observed that both steel and CFRP jacket repairing can significantly increase the ductility and the ultimate capacity of damaged columns. Notably, the steel jacket repaired columns show better energy dissipation capacity than the CFRP jacket repaired columns for columns with lower transverse reinforcement ratio. It is also observed that the location of plastic hinge region goes up as the transverse reinforcement ratio of RC columns increases.

AB - Steel or fibre-reinforced polymer (FRP) composite jackets have been utilised in retrofitting reinforced concrete (RC) bridge columns and have shown to be effective in enhancing seismic performance of the structures. However, to date, only a few researches have been conducted on the behavioural characteristics of the repaired RC columns using steel or FRP jackets. In the present paper, the comparative performance of repaired RC columns using steel and CFRP jackets is presented. Also, the effect of transverse reinforcement ratio on the behaviour of the steel and the CFRP repairing is investigated. Monotonic and cyclic load tests are conducted on nine RC column specimens with different repairing strategies and transverse reinforcement ratios to compare the ultimate and the hysteretic behaviours. From the tests, it is observed that both steel and CFRP jacket repairing can significantly increase the ductility and the ultimate capacity of damaged columns. Notably, the steel jacket repaired columns show better energy dissipation capacity than the CFRP jacket repaired columns for columns with lower transverse reinforcement ratio. It is also observed that the location of plastic hinge region goes up as the transverse reinforcement ratio of RC columns increases.

UR - http://www.scopus.com/inward/record.url?scp=33744831174&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33744831174&partnerID=8YFLogxK

U2 - 10.1680/macr.2006.58.5.267

DO - 10.1680/macr.2006.58.5.267

M3 - Article

VL - 58

SP - 267

EP - 276

JO - Magazine of Concrete Research

JF - Magazine of Concrete Research

SN - 0024-9831

IS - 5

ER -