Experimental study on the fatigue behaviour of cracked steel beams strengthened by different high strength materials

Q. Q. Yu; Y. F. Wu

Experimental study on the fatigue behaviour of cracked steel beams strengthened by different high strength materials

Q. Q. Yu^*, Y. F. Wu

^*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

Carbon fibre reinforced polymer (CFRP) materials have been proven effective in strengthening steel structures. Extensive studies were conducted to investigate the fatigue behaviour of CFRP retrofitted steel plates while research on repaired steel beams was less reported. This study tested seven cracked beams under cyclic loading, among which, six were strengthened by different materials and patch systems. These materials included normal modulus CFRP laminate, high strength steel (HSS) plate, SafStrip (SAF) plate, and two types of epoxies. The effect of adhesive bonding and mechanical anchorage was discussed. It was found these high strength materials considerably retarded the crack propagation and extended the fatigue life of the test specimens. In some cases, the crack growth rate decreased as the crack length increased. Besides, the crack mouth opening displacement (CMOD) was also significantly reduced after retrofitting. Comparing the fatigue life when the crack propagated to half height of the steel beam, CFRP laminate with structural adhesive Araldite 420 appeared to be the most effective among these retrofitting schemes.

Original language	English
Title of host publication	Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016)
Publisher	Hong Kong Polytechnic University
Pages	1158-1163
ISBN (Print)	9789881448026
Publication status	Published - Dec 2016
Externally published	Yes
Event	8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016) - The Hong Kong Polytechnic University, Hong Kong, China Duration: 14 Dec 2016 → 16 Dec 2016 https://www.polyu.edu.hk/risud/CICE2016/ https://www.polyu.edu.hk/risud/CICE2016/download/CICE2016%20programme.pdf https://www.iifc.org/wp-content/uploads/2023/01/cice-2016-proceedings.pdf

Conference

Conference	8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016)
Abbreviated title	CICE 2016
Place	Hong Kong, China
Period	14/12/16 → 16/12/16
Internet address	https://www.polyu.edu.hk/risud/CICE2016/ https://www.polyu.edu.hk/risud/CICE2016/download/CICE2016%20programme.pdf https://www.iifc.org/wp-content/uploads/2023/01/cice-2016-proceedings.pdf

Research Keywords

Fatigue test
High strength material
Steel beam
Strengthening

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@inproceedings{815bc62f727b4b05ae3b37d6cf579f71,

title = "Experimental study on the fatigue behaviour of cracked steel beams strengthened by different high strength materials",

abstract = "Carbon fibre reinforced polymer (CFRP) materials have been proven effective in strengthening steel structures. Extensive studies were conducted to investigate the fatigue behaviour of CFRP retrofitted steel plates while research on repaired steel beams was less reported. This study tested seven cracked beams under cyclic loading, among which, six were strengthened by different materials and patch systems. These materials included normal modulus CFRP laminate, high strength steel (HSS) plate, SafStrip (SAF) plate, and two types of epoxies. The effect of adhesive bonding and mechanical anchorage was discussed. It was found these high strength materials considerably retarded the crack propagation and extended the fatigue life of the test specimens. In some cases, the crack growth rate decreased as the crack length increased. Besides, the crack mouth opening displacement (CMOD) was also significantly reduced after retrofitting. Comparing the fatigue life when the crack propagated to half height of the steel beam, CFRP laminate with structural adhesive Araldite 420 appeared to be the most effective among these retrofitting schemes.",

keywords = "Fatigue test, High strength material, Steel beam, Strengthening",

author = "Yu, {Q. Q.} and Wu, {Y. F.}",

year = "2016",

month = dec,

language = "English",

isbn = "9789881448026",

pages = "1158--1163",

booktitle = "Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016)",

publisher = "Hong Kong Polytechnic University ",

note = "8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016), CICE 2016 ; Conference date: 14-12-2016 Through 16-12-2016",

url = "https://www.polyu.edu.hk/risud/CICE2016/, https://www.polyu.edu.hk/risud/CICE2016/download/CICE2016%20programme.pdf, https://www.iifc.org/wp-content/uploads/2023/01/cice-2016-proceedings.pdf",

}

Yu, QQ & Wu, YF 2016, Experimental study on the fatigue behaviour of cracked steel beams strengthened by different high strength materials. in Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016). Hong Kong Polytechnic University , pp. 1158-1163, 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016), Hong Kong, China, 14/12/16.

Experimental study on the fatigue behaviour of cracked steel beams strengthened by different high strength materials. / Yu, Q. Q.; Wu, Y. F.
Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016). Hong Kong Polytechnic University , 2016. p. 1158-1163.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Experimental study on the fatigue behaviour of cracked steel beams strengthened by different high strength materials

AU - Yu, Q. Q.

AU - Wu, Y. F.

PY - 2016/12

Y1 - 2016/12

N2 - Carbon fibre reinforced polymer (CFRP) materials have been proven effective in strengthening steel structures. Extensive studies were conducted to investigate the fatigue behaviour of CFRP retrofitted steel plates while research on repaired steel beams was less reported. This study tested seven cracked beams under cyclic loading, among which, six were strengthened by different materials and patch systems. These materials included normal modulus CFRP laminate, high strength steel (HSS) plate, SafStrip (SAF) plate, and two types of epoxies. The effect of adhesive bonding and mechanical anchorage was discussed. It was found these high strength materials considerably retarded the crack propagation and extended the fatigue life of the test specimens. In some cases, the crack growth rate decreased as the crack length increased. Besides, the crack mouth opening displacement (CMOD) was also significantly reduced after retrofitting. Comparing the fatigue life when the crack propagated to half height of the steel beam, CFRP laminate with structural adhesive Araldite 420 appeared to be the most effective among these retrofitting schemes.

AB - Carbon fibre reinforced polymer (CFRP) materials have been proven effective in strengthening steel structures. Extensive studies were conducted to investigate the fatigue behaviour of CFRP retrofitted steel plates while research on repaired steel beams was less reported. This study tested seven cracked beams under cyclic loading, among which, six were strengthened by different materials and patch systems. These materials included normal modulus CFRP laminate, high strength steel (HSS) plate, SafStrip (SAF) plate, and two types of epoxies. The effect of adhesive bonding and mechanical anchorage was discussed. It was found these high strength materials considerably retarded the crack propagation and extended the fatigue life of the test specimens. In some cases, the crack growth rate decreased as the crack length increased. Besides, the crack mouth opening displacement (CMOD) was also significantly reduced after retrofitting. Comparing the fatigue life when the crack propagated to half height of the steel beam, CFRP laminate with structural adhesive Araldite 420 appeared to be the most effective among these retrofitting schemes.

KW - Fatigue test

KW - High strength material

KW - Steel beam

KW - Strengthening

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M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 9789881448026

SP - 1158

EP - 1163

BT - Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016)

PB - Hong Kong Polytechnic University

T2 - 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2016)

Y2 - 14 December 2016 through 16 December 2016

ER -

Experimental study on the fatigue behaviour of cracked steel beams strengthened by different high strength materials

Abstract

Conference

Research Keywords

UN SDGs

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