earticle

영어

Because of quite high tensile strength, economical and locally available; bamboo can be used as a natural retrofitting material for the strengthening of RCC beam. The performance of bamboo sticks are investigated in this paper as retrofitted material. Three set of RCC beams of same dimension (width 4", thickness 6" and span 5.5') are tested up to ultimate load by one point loading system as a simply supported beam. These beams are addressed as S-1(a), S-1(b), S-1(c), S-2(a), S-2(b), S-2(c), S-3(a), S-3(b) and S-3(c) according to their set. Beams S-1(a), S-1(b) and S-1(c) are made without strengthening. The Beams S-2(a), S-2(b), S-2(c) is subjected to one layer of bamboo sticks only the bottom surface of beam. And another three beams of S-3(a), S-3(b), and S-3 (c) are strengthened by one layer of bamboo sticks on three sides of beams. After that they are tested and a comparison has been made on cracking load, ultimate load and deflection between the beams of with and without bamboo. Also a graphical representation indicates difference between the sets of two strengthening system. From this paper we can understand that the beams of three side bamboo layer (repairing) give comparatively good performance.