Axial behaviour of RC members repaired after fire exposure with FRP sheets

Ugur Demir; Goktug Unal; Ugurcan Celik; Alper Ilki

Axial behaviour of RC members repaired after fire exposure with FRP sheets

Ugur Demir^*
, Goktug Unal
, Ugurcan Celik
, Alper Ilki

^*Bu çalışma için yazışmadan sorumlu yazar

Istanbul Technical University

Araştırma sonucu: Kitap/Rapor/Konferans Bildirisinde Bölüm › Konferans katkısı › bilirkişi

1 Atıf (Scopus)

Özet

This study aims to assess the effects of a severe fire on the axial behaviour of reinforced concrete (RC) columns and the efficiency of repair through external fibre reinforced polymer (FRP) jacketing after fire exposure. In the scope of the research, results of an experimental work including a total of six square RC columns with dimensions of 300 x 300 x 500 mm are presented. The specimens had four longitudinal reinforcing bars each having 20 mm diameter while lateral confinement was maintained using stirrups with a diameter of 10 mm and a spacing of 100 mm. Four of the specimens were subjected to fire in a fire facility following ISO-834 fire curve for 90 minutes whereas two of the columns were kept at room temperature as reference specimens. Two of the fire damaged columns were repaired using two layers of carbon FRP (CFRP) sheets while other two specimens were bare columns without CFRP sheets. The columns were tested under uniaxial compression to investigate the effectiveness of CFRP sheets in repairing fire damaged structural members. Test results indicated that fire exposure adversely affected the axial load resistance, stiffness and ductility of the columns. On the other hand, in case of FRP jacketing, axial load resistance was restored and ultimate deformation capacity was remarkably increased. Furthermore, experimental study showed that the use of FRP did not restore the column’s axial stiffness which was remarkably reduced after fire exposure.

Orijinal dil	İngilizce
Ana bilgisayar yayını başlığı	Proceedings of the fib Symposium 2019
Ana bilgisayar yayını alt yazısı	Concrete - Innovations in Materials, Design and Structures
Editörler	Wit Derkowski, Piotr Krajewski, Piotr Gwozdziewicz, Marek Pantak, Lukasz Hojdys
Yayınlayan	International Federation for Structural Concrete
Sayfalar	1594-1600
Sayfa sayısı	7
ISBN (Elektronik)	9782940643004
Yayın durumu	Yayınlandı - 2019
Etkinlik	fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures - Krakow, Poland Süre: 27 May 2019 → 29 May 2019

Yayın serisi

Adı	Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures

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???event.eventtypes.event.conference???	fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures
Ülke/Bölge	Poland
Şehir	Krakow
Periyot	27/05/19 → 29/05/19

Bibliyografik not

Publisher Copyright:
© Federation Internationale du Beton (fib) - International Federation for Structural Concrete, 2019.

Finansman

This research was supported by ITU Scientific Research Department (Project No: 39548) and The Scientific and Technological Research Council of Turkey (TUBITAK) under grant number 216M535. The authors are thankful to the Yapı Merkezi Prefabrication Inc., Allianz Insurance Inc., Turk YTONG Inc., Fibrobeton Inc. for the financial supports. The staff of ITU Structural and Earthquake Engineering and Infrastructure Materials Laboratories, and Fire Laboratory at Turkish Standard Institute are also acknowledged.

Finansörler	Finansör numarası
Allianz Insurance Inc.
Fibrobeton Inc.
ITU Scientific Research Department	39548
TUBITAK	216M535
Yapı Merkezi Prefabrication Inc.
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

BM SKH

Bu sonuç, aşağıdaki Sürdürülebilir Kalkınma Hedefine/Hedeflerine katkıda bulunur

SKH 7 Erişilebilir ve Temiz Enerji
SKH 9 Sanayi, Yenilikçilik ve Altyapı
SKH 12 Sorumlu Üretim ve Tüketim

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

Demir, U., Unal, G., Celik, U., & Ilki, A. (2019). Axial behaviour of RC members repaired after fire exposure with FRP sheets. In W. Derkowski, P. Krajewski, P. Gwozdziewicz, M. Pantak, & L. Hojdys (Eds.), Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures (pp. 1594-1600). (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures). International Federation for Structural Concrete.

Demir, Ugur ; Unal, Goktug ; Celik, Ugurcan et al. / Axial behaviour of RC members repaired after fire exposure with FRP sheets. Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. editör / Wit Derkowski ; Piotr Krajewski ; Piotr Gwozdziewicz ; Marek Pantak ; Lukasz Hojdys. International Federation for Structural Concrete, 2019. pp. 1594-1600 (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures).

@inproceedings{49a0415971f64269b604f34c55cedd33,

title = "Axial behaviour of RC members repaired after fire exposure with FRP sheets",

abstract = "This study aims to assess the effects of a severe fire on the axial behaviour of reinforced concrete (RC) columns and the efficiency of repair through external fibre reinforced polymer (FRP) jacketing after fire exposure. In the scope of the research, results of an experimental work including a total of six square RC columns with dimensions of 300 x 300 x 500 mm are presented. The specimens had four longitudinal reinforcing bars each having 20 mm diameter while lateral confinement was maintained using stirrups with a diameter of 10 mm and a spacing of 100 mm. Four of the specimens were subjected to fire in a fire facility following ISO-834 fire curve for 90 minutes whereas two of the columns were kept at room temperature as reference specimens. Two of the fire damaged columns were repaired using two layers of carbon FRP (CFRP) sheets while other two specimens were bare columns without CFRP sheets. The columns were tested under uniaxial compression to investigate the effectiveness of CFRP sheets in repairing fire damaged structural members. Test results indicated that fire exposure adversely affected the axial load resistance, stiffness and ductility of the columns. On the other hand, in case of FRP jacketing, axial load resistance was restored and ultimate deformation capacity was remarkably increased. Furthermore, experimental study showed that the use of FRP did not restore the column{\textquoteright}s axial stiffness which was remarkably reduced after fire exposure.",

keywords = "Column, FRP, Fire, Reinforced concrete, Repair",

author = "Ugur Demir and Goktug Unal and Ugurcan Celik and Alper Ilki",

note = "Publisher Copyright: {\textcopyright} Federation Internationale du Beton (fib) - International Federation for Structural Concrete, 2019.; fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures ; Conference date: 27-05-2019 Through 29-05-2019",

year = "2019",

language = "English",

series = "Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures",

publisher = "International Federation for Structural Concrete",

pages = "1594--1600",

editor = "Wit Derkowski and Piotr Krajewski and Piotr Gwozdziewicz and Marek Pantak and Lukasz Hojdys",

booktitle = "Proceedings of the fib Symposium 2019",

}

Demir, U, Unal, G, Celik, U & Ilki, A 2019, Axial behaviour of RC members repaired after fire exposure with FRP sheets. in W Derkowski, P Krajewski, P Gwozdziewicz, M Pantak & L Hojdys (eds), Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, International Federation for Structural Concrete, pp. 1594-1600, fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures, Krakow, Poland, 27/05/19.

Axial behaviour of RC members repaired after fire exposure with FRP sheets. / Demir, Ugur; Unal, Goktug; Celik, Ugurcan et al.
Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. ed. / Wit Derkowski; Piotr Krajewski; Piotr Gwozdziewicz; Marek Pantak; Lukasz Hojdys. International Federation for Structural Concrete, 2019. p. 1594-1600 (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures).

Araştırma sonucu: Kitap/Rapor/Konferans Bildirisinde Bölüm › Konferans katkısı › bilirkişi

TY - GEN

T1 - Axial behaviour of RC members repaired after fire exposure with FRP sheets

AU - Demir, Ugur

AU - Unal, Goktug

AU - Celik, Ugurcan

AU - Ilki, Alper

N1 - Publisher Copyright: © Federation Internationale du Beton (fib) - International Federation for Structural Concrete, 2019.

PY - 2019

Y1 - 2019

N2 - This study aims to assess the effects of a severe fire on the axial behaviour of reinforced concrete (RC) columns and the efficiency of repair through external fibre reinforced polymer (FRP) jacketing after fire exposure. In the scope of the research, results of an experimental work including a total of six square RC columns with dimensions of 300 x 300 x 500 mm are presented. The specimens had four longitudinal reinforcing bars each having 20 mm diameter while lateral confinement was maintained using stirrups with a diameter of 10 mm and a spacing of 100 mm. Four of the specimens were subjected to fire in a fire facility following ISO-834 fire curve for 90 minutes whereas two of the columns were kept at room temperature as reference specimens. Two of the fire damaged columns were repaired using two layers of carbon FRP (CFRP) sheets while other two specimens were bare columns without CFRP sheets. The columns were tested under uniaxial compression to investigate the effectiveness of CFRP sheets in repairing fire damaged structural members. Test results indicated that fire exposure adversely affected the axial load resistance, stiffness and ductility of the columns. On the other hand, in case of FRP jacketing, axial load resistance was restored and ultimate deformation capacity was remarkably increased. Furthermore, experimental study showed that the use of FRP did not restore the column’s axial stiffness which was remarkably reduced after fire exposure.

AB - This study aims to assess the effects of a severe fire on the axial behaviour of reinforced concrete (RC) columns and the efficiency of repair through external fibre reinforced polymer (FRP) jacketing after fire exposure. In the scope of the research, results of an experimental work including a total of six square RC columns with dimensions of 300 x 300 x 500 mm are presented. The specimens had four longitudinal reinforcing bars each having 20 mm diameter while lateral confinement was maintained using stirrups with a diameter of 10 mm and a spacing of 100 mm. Four of the specimens were subjected to fire in a fire facility following ISO-834 fire curve for 90 minutes whereas two of the columns were kept at room temperature as reference specimens. Two of the fire damaged columns were repaired using two layers of carbon FRP (CFRP) sheets while other two specimens were bare columns without CFRP sheets. The columns were tested under uniaxial compression to investigate the effectiveness of CFRP sheets in repairing fire damaged structural members. Test results indicated that fire exposure adversely affected the axial load resistance, stiffness and ductility of the columns. On the other hand, in case of FRP jacketing, axial load resistance was restored and ultimate deformation capacity was remarkably increased. Furthermore, experimental study showed that the use of FRP did not restore the column’s axial stiffness which was remarkably reduced after fire exposure.

KW - Column

KW - FRP

KW - Fire

KW - Reinforced concrete

KW - Repair

UR - https://www.scopus.com/pages/publications/85066089889

M3 - Conference contribution

AN - SCOPUS:85066089889

T3 - Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures

SP - 1594

EP - 1600

BT - Proceedings of the fib Symposium 2019

A2 - Derkowski, Wit

A2 - Krajewski, Piotr

A2 - Gwozdziewicz, Piotr

A2 - Pantak, Marek

A2 - Hojdys, Lukasz

PB - International Federation for Structural Concrete

T2 - fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures

Y2 - 27 May 2019 through 29 May 2019

ER -

Demir U, Unal G, Celik U, Ilki A. Axial behaviour of RC members repaired after fire exposure with FRP sheets. In Derkowski W, Krajewski P, Gwozdziewicz P, Pantak M, Hojdys L, editörler, Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures. International Federation for Structural Concrete. 2019. p. 1594-1600. (Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures).

Axial behaviour of RC members repaired after fire exposure with FRP sheets

Özet

Yayın serisi

???event.eventtypes.event.conference???

Bibliyografik not

Finansman

BM SKH

Diğer Dosyalar ve Linkler

Parmak izi

Alıntı Yap