Effectiveness of a novel composite jacket in repairing damaged reinforced concrete structures subject to flexural loads

Mohammed, Ali A. and Manalo, Allan C. and Maranan, Ginghis B. and Muttashar, Majid and Zhuge, Yan and Vijay, P. V. and Pettigrew, John (2020) Effectiveness of a novel composite jacket in repairing damaged reinforced concrete structures subject to flexural loads. Composite Structures, 233 (Article 111634). ISSN 0263-8223


Abstract

This study evaluates the effectiveness of a novel composite repair system consisting of prefabricated fibre reinforced polymer (FRP) jacket with joint and grout infill for damaged concrete structures subject to flexural loads. Full-scale beams were prepared and tested under four-point static loads to evaluate the effects of damage location in the concrete member, joint location and internal surface coating of the jacket. The results showed that the behaviour of the repaired system is governed by the tensile cracking of the grout and failing of teeth at the joint. The FRP jacket is found to be more effective in repairing concrete members under flexural load when the damage is located at the top than at the bottom of the member. This effectiveness can be further increased by placing the joint of the composite jacket away from the compression zone. Moreover, the provision of epoxy and coarse aggregates inside the jacket surface resulted in better stress distribution and cracks propagation in the grout than the one without. Finally, a simplified fibre model analysis which considers the confined tensile and compressive properties of the grout reliably predicted the flexural capacity of the damaged beams repaired with the FRP jacket.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 16 Jan 2020 03:24
Last Modified: 07 May 2020 04:49
Uncontrolled Keywords: prefabricated FRP composite jacket, composite repair system, damaged concrete beams, FRP joint
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Identification Number or DOI: 10.1016/j.compstruct.2019.111634
URI: http://eprints.usq.edu.au/id/eprint/37465

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