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Durability performance of carbon fibre-reinforced polymer strengthened circular hollow steel members under cold weather*

Show simple item record Kabir, MH Favvzia, S Chan, THT Gamage, JCPH 2019-02-12T21:38:22Z 2019-02-12T21:38:22Z
dc.identifier.issn 13287982 en_US
dc.description.abstract The use of circular hollow steel members has attracted a great deal of attention during past few years because of having excellent structural properties, aesthetic appearance, corrosion and fire protection capability. However, no one can deny the structural deficiency of such structures due to reduction of strength when they are exposed to severe environmental conditions such as marine environment, cold and hot weather. Hence strengthening and retrofitting of structural steel members is now wry imperative. This paper presents the findings of a research program that was conducted to study the bond durability of carbon fibre-reinforced polymer (CFRP) strengthened steel tubular members under cold weather and tested under four-point bending. Six number of CFRP-strengthened specimens and one unstrengthened specimen were considered in this program. The three specimens having sand blasted surface to be strengthened was pre-lrealed with MB race primer and other three were remained untreated and then cured under ambient temperature at least four weeks and cold weather (3 °C) for three and six months period of time. Quasi-static tests were then performed on beams to failure under four-point bending. The structural response of each specimen was predicted in terms of failure load, mid-span deflection, composite beam behaviour and failure mode. The research outcomes show that the cold weather immersion had an adverse effect on durability of CFRP-strengthened steel structures. Moreover, the epoxy based adhesion promoter was found to enhance the bond durability in plastic range. The analytical models presented in this study were found to be in good agreement in terms of predicting ultimate load and deflection. Finally, design factors are proposed to address the short-terms durability performance muter cold weather. en_US
dc.language.iso en en_US
dc.subject Tubular steel member; CFRP; strengthening; durability; cold weather; surface pre-treatment; analytical model; design factors. en_US
dc.title Durability performance of carbon fibre-reinforced polymer strengthened circular hollow steel members under cold weather* en_US
dc.type Article-Abstract en_US
dc.identifier.year 2014 en_US
dc.identifier.journal Australian Journal of Structural Engineering, en_US
dc.identifier.issue no. 04 en_US
dc.identifier.volume vol. 15 en_US
dc.identifier.pgnos pp. 377 - 392 en_US
dc.identifier.doi http://dx.doi.Org/10.7158/S13-042.2014.15.4. en_US

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