Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets

Hailong Gong; Lewei Tong; Xiao-Ling Zhao; Yuguang Fu

Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets

Hailong Gong
, Lewei Tong
, Xiao-Ling Zhao
, Yuguang Fu

Civil & Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

Abstract

This paper presents an experimental investigation on CFRP strengthening of severely fatigue damaged SRC (steel-reinforced concrete) beams. Bending tests were carried out on three types of SRC beams: (1) SRC beams without any damage, (2) damaged SRC beams repaired by welding and (3) damaged SRC beams repaired by welding and CFRP. Failure modes of different types of SRC beams were compared. The effects of fatigue loading history and CFRP on static performance of SRC beams were studied. The experimental results showed that, for the fatigue damaged SRC beams, flexural bearing capacity can be restored if they were repaired by welding fractured beams and re-bars even without CFRP sheets, but the plastic strengthening of encased steel is weakened. CFRP sheets can effectively increase the ultimate flexural bearing capacity and overall stiffness of SRC beams. Meanwhile, it can delay crack propagation, reduce the width of surface cracks, and decrease the deflection under yield load and ultimate load. Finally, the strength of CFRP sheets will be fully utilized by using end anchorages.

Original language	English
Title of host publication	Proceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013)
Subtitle of host publication	Melbourne Vic Australia; 11-13 December 2013
Editors	Riadh Al-Mahaidi, Scott T. Smith, Yu Bai, Xiao-Ling Zhao
Place of Publication	Melbourne Vic Australia
Publisher	International Institute for FRP in Construction (IIFC)
Pages	1-6
Number of pages	6
ISBN (Electronic)	9780987593016
ISBN (Print)	9780987593016
Publication status	Published - 2013
Event	Asia-Pacific Conference on FRP in Structures 2013 - Melbourne, Australia Duration: 11 Dec 2013 → 13 Dec 2013 Conference number: 4th

Conference

Conference	Asia-Pacific Conference on FRP in Structures 2013
Abbreviated title	APFIS 2013
Country/Territory	Australia
City	Melbourne
Period	11/12/13 → 13/12/13

Cite this

Gong, H., Tong, L., Zhao, X.-L., & Fu, Y. (2013). Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets. In R. Al-Mahaidi, S. T. Smith, Y. Bai, & X.-L. Zhao (Eds.), Proceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013): Melbourne Vic Australia; 11-13 December 2013 (pp. 1-6). International Institute for FRP in Construction (IIFC).

Gong, Hailong ; Tong, Lewei ; Zhao, Xiao-Ling et al. / Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets. Proceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013): Melbourne Vic Australia; 11-13 December 2013. editor / Riadh Al-Mahaidi ; Scott T. Smith ; Yu Bai ; Xiao-Ling Zhao. Melbourne Vic Australia : International Institute for FRP in Construction (IIFC), 2013. pp. 1-6

@inproceedings{871ffc6090234a40b45b254d014894f2,

title = "Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets",

abstract = "This paper presents an experimental investigation on CFRP strengthening of severely fatigue damaged SRC (steel-reinforced concrete) beams. Bending tests were carried out on three types of SRC beams: (1) SRC beams without any damage, (2) damaged SRC beams repaired by welding and (3) damaged SRC beams repaired by welding and CFRP. Failure modes of different types of SRC beams were compared. The effects of fatigue loading history and CFRP on static performance of SRC beams were studied. The experimental results showed that, for the fatigue damaged SRC beams, flexural bearing capacity can be restored if they were repaired by welding fractured beams and re-bars even without CFRP sheets, but the plastic strengthening of encased steel is weakened. CFRP sheets can effectively increase the ultimate flexural bearing capacity and overall stiffness of SRC beams. Meanwhile, it can delay crack propagation, reduce the width of surface cracks, and decrease the deflection under yield load and ultimate load. Finally, the strength of CFRP sheets will be fully utilized by using end anchorages.",

author = "Hailong Gong and Lewei Tong and Xiao-Ling Zhao and Yuguang Fu",

year = "2013",

language = "English",

isbn = "9780987593016",

pages = "1--6",

editor = "Riadh Al-Mahaidi and Smith, \{Scott T.\} and Yu Bai and Xiao-Ling Zhao",

booktitle = "Proceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013)",

publisher = "International Institute for FRP in Construction (IIFC)",

address = "Canada",

note = "Asia-Pacific Conference on FRP in Structures 2013, APFIS 2013 ; Conference date: 11-12-2013 Through 13-12-2013",

}

Gong, H, Tong, L, Zhao, X-L & Fu, Y 2013, Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets. in R Al-Mahaidi, ST Smith, Y Bai & X-L Zhao (eds), Proceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013): Melbourne Vic Australia; 11-13 December 2013. International Institute for FRP in Construction (IIFC), Melbourne Vic Australia, pp. 1-6, Asia-Pacific Conference on FRP in Structures 2013, Melbourne, Victoria, Australia, 11/12/13.

Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets. / Gong, Hailong; Tong, Lewei; Zhao, Xiao-Ling et al.
Proceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013): Melbourne Vic Australia; 11-13 December 2013. ed. / Riadh Al-Mahaidi; Scott T. Smith; Yu Bai; Xiao-Ling Zhao. Melbourne Vic Australia: International Institute for FRP in Construction (IIFC), 2013. p. 1-6.

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

TY - GEN

T1 - Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets

AU - Gong, Hailong

AU - Tong, Lewei

AU - Zhao, Xiao-Ling

AU - Fu, Yuguang

N1 - Conference code: 4th

PY - 2013

Y1 - 2013

N2 - This paper presents an experimental investigation on CFRP strengthening of severely fatigue damaged SRC (steel-reinforced concrete) beams. Bending tests were carried out on three types of SRC beams: (1) SRC beams without any damage, (2) damaged SRC beams repaired by welding and (3) damaged SRC beams repaired by welding and CFRP. Failure modes of different types of SRC beams were compared. The effects of fatigue loading history and CFRP on static performance of SRC beams were studied. The experimental results showed that, for the fatigue damaged SRC beams, flexural bearing capacity can be restored if they were repaired by welding fractured beams and re-bars even without CFRP sheets, but the plastic strengthening of encased steel is weakened. CFRP sheets can effectively increase the ultimate flexural bearing capacity and overall stiffness of SRC beams. Meanwhile, it can delay crack propagation, reduce the width of surface cracks, and decrease the deflection under yield load and ultimate load. Finally, the strength of CFRP sheets will be fully utilized by using end anchorages.

AB - This paper presents an experimental investigation on CFRP strengthening of severely fatigue damaged SRC (steel-reinforced concrete) beams. Bending tests were carried out on three types of SRC beams: (1) SRC beams without any damage, (2) damaged SRC beams repaired by welding and (3) damaged SRC beams repaired by welding and CFRP. Failure modes of different types of SRC beams were compared. The effects of fatigue loading history and CFRP on static performance of SRC beams were studied. The experimental results showed that, for the fatigue damaged SRC beams, flexural bearing capacity can be restored if they were repaired by welding fractured beams and re-bars even without CFRP sheets, but the plastic strengthening of encased steel is weakened. CFRP sheets can effectively increase the ultimate flexural bearing capacity and overall stiffness of SRC beams. Meanwhile, it can delay crack propagation, reduce the width of surface cracks, and decrease the deflection under yield load and ultimate load. Finally, the strength of CFRP sheets will be fully utilized by using end anchorages.

UR - https://www.scopus.com/pages/publications/84926058394

UR - http://www.iifc.org/proceedings/APFIS_2013/assets/papers/122.pdf

M3 - Conference Paper

SN - 9780987593016

SP - 1

EP - 6

BT - Proceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013)

A2 - Al-Mahaidi, Riadh

A2 - Smith, Scott T.

A2 - Bai, Yu

A2 - Zhao, Xiao-Ling

PB - International Institute for FRP in Construction (IIFC)

CY - Melbourne Vic Australia

T2 - Asia-Pacific Conference on FRP in Structures 2013

Y2 - 11 December 2013 through 13 December 2013

ER -

Gong H, Tong L, Zhao XL, Fu Y. Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets. In Al-Mahaidi R, Smith ST, Bai Y, Zhao XL, editors, Proceedings of the 4th Asia-Pacfic Conference on FRP in Structures (APFIS 2013): Melbourne Vic Australia; 11-13 December 2013. Melbourne Vic Australia: International Institute for FRP in Construction (IIFC). 2013. p. 1-6

Experimental investigation on static flexural behavior of fatigue damaged SRC beams strengthened with CFRP sheets

Abstract

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