Effect of bond length on the behaviour of CFRP strengthened concrete-filled steel tubes under transverse impact

Alam, Md Iftekharul, Fawzia, Sabrina, & Liu, Xuemei (2015) Effect of bond length on the behaviour of CFRP strengthened concrete-filled steel tubes under transverse impact. Composite Structures, 132, pp. 898-914.

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Abstract

Concrete-filled steel tubular (CFST) columns have shown great potential as axial load carrying member and used widely in many mission critical infrastructures. However, attention is needed to strengthen these members where transverse impact force is expected to occur due to vehicle collisions. In this work, finite element (FE) model of carbon fibre reinforced polymer (CFRP) strengthened CFST columns are developed and the effect of CFRP bond length is investigated under transverse impact loading. Initially the numerical models have been validated by comparing impact test results from literature. The validated models are then used for detail parametric studies by varying the length of externally bonded CFRP composites. The parameters considered for this research are impact velocity, impact mass, CFRP modulus, adhesive type, and axial static loading. It has been observed that the effect of CFRP strengthening is consistent after an optimum effective bond length of CFRP wrapping. The effect of effective bond length has been studied for above parameters. The results show that, under combined axial static and transverse impact loads CFST columns can successfully prevent global buckling failure by strengthening only 34% of column length. Therefore, estimation of effective bond length is essential to utilise the CFRP composites cost effectively.

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6 citations in Scopus
3 citations in Web of Science®
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ID Code: 85875
Item Type: Journal Article
Refereed: Yes
Keywords: CFRP; Concrete-filled steel tubular (CFST) columns; Transverse impact; Bond length; Numerical models
DOI: 10.1016/j.compstruct.2015.06.065
ISSN: 0263-8223
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Civil Engineering not elsewhere classified (090599)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier Ltd.
Copyright Statement: This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Deposited On: 20 Jul 2015 23:44
Last Modified: 26 Jul 2015 04:39

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