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Experimental Investigation on Behavior of R.C.C Beam Retrofitted With Sisal Fibre Sheet

A.S.Jeyabharathy, Dr.S.Robert Ravi

Reinforced concrete beams are the main structural elements which lead to local failure subjected to earthquake forces. As we know during earthquake, a huge amount of energy released and hence the structural elements must have ductility behaviour and enough absorption capacity in order to avoid the loss of life and property due to earthquake force. Now a day authority insisted to incorporate the ductility code IS 13920:1993 while designing a structural elements. But we are in position to strengthen the existing structural elements which are already design by IS 456:2000 to meet the ductility requirement given by IS 13920:1993.External confinement of structural elements is one of the strengthening method. In order to utilise the local resources available in and around the area in which the structural elements are situated, the natural fibres like SISAL,VAKKA,BANANA etc.. are used make fibre sheets for retrofitting the structural element. Three reinforced concrete beam specimens were casted in which one had reinforcement detail as per code IS 456:2000(control) and another had reinforcement details as per code IS 13920:1993(control).The remaining specimen had reinforcement details as per code IS 456:2000 retrofitted with SISAL fibre sheets using epoxy resin(retrofitted). Both ends of beam were hinged. Static load was applied at the top of the beam up to a controlled load. An attempt has been made to know the performance of retrofitted specimens compared with control specimens and the results are presented in this paper.