Strengthening of R.C. beams using externally bonded plates and anchorages

• Main Authors: Jumaat, Mohd Zamin, Alam, Md Ashraful
• Format: Article
• Language: English
• Published: American-Eurasian Network for Scientific Information, Jordan 2009
• Subjects: TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.um.edu.my/6081/1/Strengthening_of_R.C._beams_using_externally_bonded_plates_and_anchorages.pdf; http://eprints.um.edu.my/6081/; http://www.ajbasweb.com/old/ajbas/2009/2207-2211.pdf

This paper presents a study on strengthened reinforced concrete beams using externally bonded plates and anchorages. Strengthening materials and methods, failure modes of strengthened beams, effect of end anchorages and effect of intermediate anchorages are reviewed. An experimental programme to evaluate the structural behaviour of anchored steel plate and CFRP laminate flexurally strengthened reinforced concrete beams is also reported. A total of five beams, each 2300 mm long, 125 mm wide, and 250 mm deep, were fabricated and tested. One beam was left un-strengthened to act as the control beam, two beams were strengthened with steel plate and another two beams were strengthened with CFRP laminate. From each of the steel plate and CFRP laminate strengthened beams, one beam was left unanchored and another beam was anchored at the end and shear spans (intermediate anchored) by L shape plates to avoid premature failure. The experimental results overall showed that the strengthened beams had higher failure loads and good failure modes over the control beam. Results also illustrated that the end with intermediate anchored strengthened beams gave higher failure loads and better failure modes compared to unanchored strengthened beams.