INVESTIGATION ON STRESS STRAIN BEHAVIOR OF CONFINED CONCRETE

Abstract

In the present world, there is wide scope for strengthening the structural concrete elements which calls upon the use of confined concrete. The present study focuses on the stress-strain  behaviour of confined concrete cylinders subjected to compression.  Nine specimens involving the use of  carbon fiber reinforced polymer(CFRP) with varying wrap thickness of 1, 2, 3 layers are wrapped in the direction of fibers are adopted  in the study. Nine specimens with the use of helical steel rings of pitch of 25mm,50mm and 75mm and nine specimens involving hook end  steel fibers of 0.5%, 1% and 1.5% are undertaken in the present study. The stress-strain behavior for all above specimens are recorded and obtained results are compared.