Shear transfer mechanism of reinforced concrete push-off specimen using externally bonded fibre reinforced polymer (FRP) composites

Abdul Samad, Abdul Aziz and Jayaprakash, J. (2009) Shear transfer mechanism of reinforced concrete push-off specimen using externally bonded fibre reinforced polymer (FRP) composites. Other thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

The deterioration of existing reinforced concrete structures has motivate researchers all over the world to come up with a solution for an effective means of rehabilitating the structures. Nowadays, the use of composite materials for such needs has been an effective ways to overcome the problem and the use of Fibre Reinforced Polymer (FRP) as a strengthening and repair material is a well known method in civil engineering arena. Extensive researches have been conducted on the shear strengthening of reinforced concrete simply supported beams using FW composites. However, strengthening continuous beams in shear have received very little attention among the researchers whereas most of existing structures are in the form of continuous condition. Furthermore, there are restraints to add shear reinforcement to an existing reinforced concrete beams when beams are part of floor-beam system. Therefore, FRP sheets can be seen as one suitable solution to overcome such condition. This study involves an experimental work of five continuous beams with a size of 15Ox350x5800mm where one beam was the control specimen, another two beams were strengthened with one layer of CFRP strips and another two beams were strengthened with two layers of CFRP strips. The variables were number of layer (one layer and two layers) and wrapping scheme (four-sides wrap and three-sides wrap) of CFRP strips. Test results shows that all beams fails in shear as expected and an increase of 24% to 55% of ultimate load for beams strengthened with CFRP strips. The load increment of two layers of CFRP strips were also significance which is around 20% compared with one layer of CFRP strips. For full four-side wrap, the load increment is around 8% to 9% compared with threeside wrap. These experimental resuIts shows that CFRP strips technique can be used to enhance shear capacity of continuous beams. Simulation study and theoretical analysis was also presented.

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:6883
Deposited By:Normajihan Abd. Rahman
Deposited On:12 May 2015 16:49
Last Modified:12 May 2015 16:49

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