الفهرس | Only 14 pages are availabe for public view |
Abstract The effectiveness of reinforced concrete repairs may be established in terms of their ability to restore the structural integrity of the reinforced concrete element and to protect the reinforcement from severe weathering conditions. The technique of bonding steel plates usmg epoxy adhesives is recognized as an effective and convenient method for repair and rehabilitation of existing reinforced concrete structures. However the problems associated with the steel corrosion, handling due to excessive size and weight, undesirable formation of welds, partial composite action with the surface concrete and deboding, lead to the need for alternative materials, and further research in this field. The high strength to weight ratio, resistance to electro-chemical corrosion, larger creep strain, good fatigue strength, potential for. decreased installation costs and repairs due to lower weight in comparison with steel, non-magnetic and non-metallic properties of carbon fib er reinforced polymer (CFRP) composites offer a viable alternative to bonding of steel plates. The emergence of high strength epoxies has also enhanced the feasibility of using CFRP sheets and fabric for repair and rehabilitation. The mam objective of this thesis is to give better and full understanding of the flexure behaviour of rectangular reinforced concrete pre-cracked beams strengthened with Carbon Fiber Reinforced Plastics (CFRP) sheets. The experimental program involved testing fourteen R.C. rectangular beams. They were designed to fail in flexure and tested under flexure in ( ii ) |