TY - JOUR
T1 - FRP strengthened SHS beam-column connection under monotonic and large-deformation cyclic loading
AU - Tafsirojjaman, T.
AU - Fawzia, Sabrina
AU - Thambiratnam, David P.
AU - Zhao, Xiao Ling
N1 - Funding Information:
The authors would wish to thank the technical staff of the Banyo Pilot Plant Precinct of Queensland University of Technology (QUT), Mr. Frank De Bruyne, Mr. Barry Hume and Mr. Cameron Creevey, for their technical support to conduct the reported experimental testing. The authors also would wish to thank the School of Civil and Environmental Engineering of Queensland University of Technology ( QUT ), Australia for the financial support to conduct the reported experimental testing.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/4
Y1 - 2021/4
N2 - 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 the ductility.
AB - 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 the ductility.
KW - Carbon fibre reinforced polymer (CFRP)
KW - Cyclic loading
KW - Glass fibre reinforced polymer (GFRP)
KW - Monotonic loading
KW - Square hollow sections (SHS) beam-column connections
KW - Strengthening
UR - http://www.scopus.com/inward/record.url?scp=85100775060&partnerID=8YFLogxK
U2 - 10.1016/j.tws.2021.107518
DO - 10.1016/j.tws.2021.107518
M3 - Journal article
AN - SCOPUS:85100775060
SN - 0263-8231
VL - 161
JO - Thin-Walled Structures
JF - Thin-Walled Structures
M1 - 107518
ER -