Experimental and numerical investigation of the behaviour of CFRP strengthened CHS beams subjected to bending

Kabir, M.H., Fawzia, S., Chan, T.H.T., Gamage, J.C.P.H., & Bai, J.B. (2016) Experimental and numerical investigation of the behaviour of CFRP strengthened CHS beams subjected to bending. Engineering Structures, 113, pp. 160-173.

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Abstract

This paper presents the results of an experimental and numerical program to investigate the circular hollow section (CHS) beams, strengthened using Carbon Fibre Reinforced Polymer (CFRP) sheets. The circular hollow shaped steel beams bonded with different CFRP layer orientations were tested under four-point bending. The mid-span deflection, service load and failure load were recorded. The LHL (where L, first inner longitudinal layer, H, second hoop layer and L, third outer longitudinal layer) and LLH (where L, first inner longitudinal layer, L, second longitudinal layer and H, third outer hoop layer) layer oriented strengthened beams perform slightly better than HHL (where H, first inner hoop layer, H, second hoop layer and L, third outer longitudinal layer) layer oriented strengthened beams. The LHL and LLH layer oriented treated beams showed very similar structural behaviour. Numerical analyses were then conducted on the CFRP strengthened steel CHS beams. The validity of the models has been assessed by comparing the failure loads and mid-span deflections. The effects of various parameters such as bond length, section types, tensile modulus of CFRP, adhesive layer thickness and adhesive types have been studied.

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ID Code: 92543
Item Type: Journal Article
Refereed: Yes
Keywords: CHS, CFRP, strengthened, layer orientation, numerical investigation, bending
DOI: 10.1016/j.engstruct.2016.01.047
ISSN: 0141-0296
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 Elsevier
Deposited On: 02 Feb 2016 03:56
Last Modified: 10 Jun 2016 05:17

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