Browsing by Author "Prashanth, M"

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    item: Conference-Full-text
    Alternatives to delay premature failure of CFRP strengthened reinforced concrete members
    (2013-11-12) Srisangeerthanan, S; Prashanth, M; Amaradasa, PNS; Gamage, JCPH
    This Study was focused on identifying and proposing alternatives such that premature debonding failure of CFRP strengthened reinforced concrete members in flexure is delayed. Two of our proposed alternatives were investigated in relation to three control beams of two standard configurations. A unidirectional CFRP fabric was applied onto the concrete surface using two part epoxy resin as a binder inclusive of an inexpensive polymer mesh of polyester in specific arrangements. Three point bending tests were conducted. This study shows that the polymer mesh of polyester laid in the bond line has effectively delayed premature failure of composites. A range of 60% to 80% strength gains with respect to control beams was noted. Failure was observed with the formation of a mid-span flexure crack causing mid span debonding and subsequently debonding at the ends.
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    item: Conference-Abstract
    Investigation on alternatives to avoid de-bonding failure of CFRP strengthened members
    (2016-05-10) Srisangeerthanan, S; Prashanth, M; Amaradasa, PNS; Gamage, JCPH
    This study deals with the investigation of de-bonding failures when CFRP is used for structural retrofitting to enhance the load carrying capacity of reinforced concrete members. De-bonding failures being the most dominating failure mode as limiting factor for enhancing strength hinders the full utilization of the capabilities of CFRP. Therefore the objective of this study is to come up with a proposal that would delay the premature failure of strengthened members by enhancing the strength gains by means of a specific arrangement or orientation of placement or any other fastening mechanism. This study would yield better strength gains and present a simple method that would overcome de-bonding failure by a significant fraction.