Fatigue behaviour of cracked steel beams retrofitted with carbon fibrereinforced polymer laminates

Yu, Q and Wu, Y 2018, 'Fatigue behaviour of cracked steel beams retrofitted with carbon fibrereinforced polymer laminates', Advances in Structural Engineering, vol. 21, no. 8, pp. 1148-1161.


Document type: Journal Article
Collection: Journal Articles

Title Fatigue behaviour of cracked steel beams retrofitted with carbon fibrereinforced polymer laminates
Author(s) Yu, Q
Wu, Y
Year 2018
Journal name Advances in Structural Engineering
Volume number 21
Issue number 8
Start page 1148
End page 1161
Total pages 14
Publisher Sage Publications, Inc.
Abstract In recent years, externally bonded carbon fibrereinforced polymer has been considered an innovative way to strengthen steel structures attributed to its high strength-to-weight ratio, excellent corrosion resistance and fatigue performance. This article presents an experimental and numerical study on the fatigue behaviour of defected steel beams strengthened with carbon fibrereinforced polymer laminates, with a special focus on the effect of interfacial debonding. Analytical modelling and numerical simulation confirmed that the interfacial debonding had a pronounced effect on carbon fibrereinforced polymer strain and stress intensity factor at the crack front. After introducing interfacial debonding from experimental findings into the numerical analysis, the fatigue life and crack propagation versus cycle numbers of the specimens compared well with the test results. Based on the current experimental program, specimens with Sikadur 30 were more prone to debonding failure; therefore, Araldite 420 is suggested for strengthening schemes.
Subject Structural Engineering
Keyword(s) carbon fibrereinforced polymer
debonding
fatigue
steel beam
strengthen
stress intensity factor
DOI - identifier 10.1177/1369433217729518
Copyright notice © The Author(s) 2017
ISSN 1369-4332
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