Structural behaviour of CFRP strengthened beam-column connections under monotonic and cyclic loading

Tafsirojjaman, T. ORCID: and Fawzia, Sabrina and Thambiratnam, David P. (2021) Structural behaviour of CFRP strengthened beam-column connections under monotonic and cyclic loading. Structures, 33. pp. 2689-2699.

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Welded beam-column connections may be vulnerable to failure under cyclic loading conditions. These connections might require strengthening to resist static and cyclic loads as they may exhibit inadequate capacity due to the design errors or material properties degradation because of severe environmental effects or an increase in service loads. With this in mind, a series of full-scale experiments have been conducted to investigate the behaviour of the bare and strengthened welded beam-column connections under both monotonic and large-displacement cyclic loading. Carbon fibre reinforced polymer (CFRP) is used as the strengthening material in the present study along with epoxy adhesive as the bonding material. The experimental study conclusively showed the benefits of CFRP composites to improve the performance of welded connections under both monotonic and cyclic loadings. Under monotonic loading, the ultimate moment capacity, stiffness, dissipation of energy and ductility of the welded connections improved by strengthening with CFRP. Additionally, under cyclic loading, the CFRP strengthened welded connections showed improvement in moment hysteresis behaviour, higher stiffness and energy dissipation capacity compared to their bare counterparts. Moreover, the experimentally obtained moment capacities match reasonably well with the theoretically predicted moment capacities.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Submitted Version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 22 Jun 2021 04:19
Last Modified: 16 Aug 2022 04:52
Uncontrolled Keywords: welded beam-column connections; strengthening; carbon fibre reinforced polymer (CFRP); monotonic loading; cyclic loading
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090504 Earthquake Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400506 Earthquake engineering
40 ENGINEERING > 4005 Civil engineering > 400510 Structural engineering
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