Development of a compatability model for the shear strengthening of reinforced concrete continuous beams using externally bonded bi-directional CFRP strips

Abdul Samad, Abdul Aziz and Jayaprakash, J. (2013) Development of a compatability model for the shear strengthening of reinforced concrete continuous beams using externally bonded bi-directional CFRP strips. Other thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

The behaviour of reinforced concrete in shear is very complex and structure that fails in shear was dangerous than flexural failure because shear failure usually occurs suddenly and without any warning. It has been found out that many of existing reinforced concrete structures are deficient is shear 'md needs to be repaired. Therefore, this study tends to investigate the shear behaviour of reinforced concrete beams strengthened and repaired using Carbon Fibre Reinforced Polymer (CFRP) composites. An experimental work on ten reinforced concrete continuous beams has been conducted. The parameter involved in this study was shear span to effective depth ratio, wrapping schemes and CFRP strips orientation. All beams fails in shear as expected. Modes of failure for beams wrapped at three sides of the beam were debonding and rupture of the CFRP strips while beams wrapped at four sides of the beam fails in rupture of the CFRP strips. The highest shear capacity enhancement was for beam wrapped at four sides of the beam with 45"/135* orientation of the CFRP strips. From the experimental results, it can be concluded that wrapping schemes influences the shear capacity and diagonal crack angle of the beam. It was also important to notice that for continuous beams, due to the complexity of the high shear and bending moment region, the critical area (inner shear span) of the high shear area should be strengthened more than the outer shear span of the beam.

Item Type:Thesis (Other)
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
ID Code:6882
Deposited By:Normajihan Abd. Rahman
Deposited On:12 May 2015 16:48
Last Modified:12 May 2015 16:48

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