Pre-impregnated carbon fibre reinforced composite system for patch repair of steel I-beams

Manalo, Allan and Sirimanna, Chamila and Karunasena, Warna and McGarva, Lance and Falzon, Paul (2016) Pre-impregnated carbon fibre reinforced composite system for patch repair of steel I-beams. Construction and Building Materials, 105. pp. 365-376. ISSN 0950-0618

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The application of fibre-reinforced polymer (FRP) composites for strengthening and rehabilitation of structural elements has become essential in recent years. However, most of the research and developments focused on using FRP strips or plates, which are limited in strengthening metallic structures with flat steel surfaces. In most cases, the damage due to corrosion are localised in the beam which requires more flexible composite repair system. In this study, a pre-impregnated carbon fibre reinforced epoxy repair system is evaluated through mechanical testing of tensile, double strap shear joint specimens, and structural testing of rehabilitated I-beams. The results showed that use of vacuum during laminate manufacture resulted in better mechanical properties due to the better consolidation of the fibre layers. A bond length of 120 mm provides a more consistent and reliable adhesively bonded joint and is representative of the bond strength of the rehabilitated steel beam. Finally, the patched carbon prepreg system successfully repaired the simulated crack and corrosion defects in steel I-beams, restoring them to their original load carrying capacity and stiffness.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 05 Jul 2016 03:35
Last Modified: 06 Feb 2017 06:59
Uncontrolled Keywords: prepreg carbon; patch repair; tensile; double-strap shear; beam; corrosion; crack
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.conbuildmat.2015.12.172

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