FRP strengthened SHS beam-column connection under monotonic and large-deformation cyclic loading

Tafsirojjaman, T. ORCID: and Fawzia, Sabrina and Thambiratnam, David P. and Zhao, Xiao-Ling (2021) FRP strengthened SHS beam-column connection under monotonic and large-deformation cyclic loading. Thin-Walled Structures, 161:107518. pp. 1-12. ISSN 0263-8231

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Many civil applications use square hollow sections (SHSs) as members in beam-column connections which can be vulnerable under cyclic loading. Cyclic loadings from earthquakes, wind, waves and currents affect onshore and offshore civil infrastructure. In addition, these beam-column connections can become structurally inadequate through incremental service loads, design/fabrication errors and material property degradation over time. Due to this, it will be necessary to strengthen SHS beam-column connections to improve their performance under sustained monotonic and cyclic loadings. This paper treats the performance of SHS beam-column connections strengthened with externally bonded carbon fibre reinforced polymer (CFRP) and glass fibre reinforced polymer (GFRP). Experimental investigations have been conducted on the bare, CFRP and GFRP strengthened SHS connections under monotonic and cyclic loading. Results show that under cyclic loading both CFRP and GFRP strengthened SHS beam-column connections exhibit improved ultimate moment capacity, moment degradation behaviour, secant stiffness, energy dissipation capacity and plastic hinge behaviour compared to their bare counterparts. Under monotonic loading, both types of strengthened connections show higher moment capacity, secant stiffness and ductility. In addition, CFRP strengthening enhances the ultimate strength, while GFRP strengthening enhances ductility.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 17 Feb 2021 23:24
Last Modified: 17 Feb 2021 23:24
Uncontrolled Keywords: Square hollow sections (SHS) beam-column connections; Carbon fibre reinforced polymer (CFRP); Glass fibre reinforced polymer (GFRP); Strengthening; Monotonic loading; Cyclic loading
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0905 Civil Engineering > 090504 Earthquake Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400509 Structural dynamics
40 ENGINEERING > 4005 Civil engineering > 400506 Earthquake engineering
40 ENGINEERING > 4005 Civil engineering > 400510 Structural engineering
Socio-Economic Objectives (2008): B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
B Economic Development > 87 Construction > 8704 Construction Processes > 870401 Civil Construction Processes
B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870302 Metals (e.g. Composites, Coatings, Bonding)
Socio-Economic Objectives (2020): 12 CONSTRUCTION > 1203 Construction materials performance and processes > 120304 Polymeric materials and paints
12 CONSTRUCTION > 1202 Construction design > 120201 Civil construction design
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