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Effects of cold weather on durability of CFRP strengthened circular hollow steel members

Show simple item record Kabir, MH Fawzia, S Chan, THT Gamage, JCPH 2018-11-13T21:09:24Z 2018-11-13T21:09:24Z
dc.description.abstract Tubular members have become progressively more popular due to excellent structural properties, aesthetic appearance, corrosion and fire protection capability. However, a large number of such structures are found structurally deficient due to reduction of strength when they expose to severe environmental conditions such as marine environment, cold and hot weather. Hence strengthening and retrofitting of structural members are in high demands. In recent times Carbon Fibre Reinforced Polymers (CFRP) composites appears to be an excellent solution to enhance the load carrying capacity and serviceability of steel structures because of its superior physical and mechanical properties. However, the durability of such strengthening system under cold environmental condition has not yet been well documented to guide the engineers. This paper presents the findings of a study conducted to enhance the bond durability of CFRP strengthened steel tubular members by treating steel surface using epoxy based adhesion promoter under cold weather subjected to bending. The experimental program consisted of six number of CFRP strengthened specimens and one bare specimen. The sand blasted surface of the three specimens to be strengthened was pre-treated with MBrace primer and other three were remained untreated and then cured under ambient temperature and cold weather (3oC) for three and six months period of time. The beams were then loaded to failure under four point bending. The structural response of each specimen was predicted in terms of failure mode, failure load and mid-span deflection. The research findings show that the cold weather immersion had an adverse effect on durability of CFRP strengthened structures. Moreover, the epoxy based adhesion promoter was found to enhance the bond durability in elastic range. en_US
dc.language.iso en en_US
dc.subject Tubular steel member, CFRP, strengthening, durability, cold weather, surface pre-treatment. en_US
dc.title Effects of cold weather on durability of CFRP strengthened circular hollow steel members en_US
dc.type Conference-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Civil Engineering en_US
dc.identifier.year 2013 en_US
dc.identifier.conference Asia-Pacific Conference on FRP in Structures - (APFIS - 2013) en_US Melbourne en_US, en_US

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