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Fatigue testing of defected steel beams retrofitted using sandwich-layered high and normal modulus CFRP sheets

Citation

Jiao, H and Phan, HB and Zhao, XL, Fatigue testing of defected steel beams retrofitted using sandwich-layered high and normal modulus CFRP sheets, Proceedings of the 6th International Composites Conference, 14-16 November, Monash University, Melbourne, Australia, pp. 1-6. ISBN 978-0-646-58589-5 (2012) [Refereed Conference Paper]


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Abstract

CFRP sheets are extensively used to strengthen defected steel members due to the advantages of high strength and light weight of CFRP. Among different types of CFRP sheets, high modulus sheets showed better performance in extending the fatigue life of defected steel elements. It was found that fibre breakage was the main failure mode for specimens reinforced with high modulus CFRP sheets comparing to debonding failure in the interface between CFRP and steel for specimens repaired with normal modulus CFRP. It is generally believed that failure should occur within the adhesive layer in the form of cohesion failure so that the FRP material can be better utilised. In this study, CFRP sheets with high and normal modulus were applied in a sandwich layered manner. Fatigue tests were conducted with fatigue life being compared with those obtained from previous tests. Results showed that failure happened consistently in the interface of steel and epoxy resin with a fatigue life of around 80% of that strengthened with high modulus CFRP sheets only.

Item Details

Item Type:Refereed Conference Paper
Keywords:fatigue, defected steel beams, high and normal modulus, CFRP sheets
Research Division:Engineering
Research Group:Civil Engineering
Research Field:Structural Engineering
Objective Division:Construction
Objective Group:Construction Materials Performance and Processes
Objective Field:Metals (e.g. Composites, Coatings, Bonding)
Author:Jiao, H (Dr Hui Jiao)
Author:Phan, HB (Mr Hai Phan)
ID Code:81981
Year Published:2012
Deposited By:Engineering
Deposited On:2013-01-14
Last Modified:2014-09-04
Downloads:1 View Download Statistics

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