الفهرس 
chapter 1Only 14 pages are availabe for public view
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Abstract
Nowadays, civil engineer deals with the problem of strengthening existing structures to assure their structural safety or to increase it. It is apparent that Fiber Reinforced Polymer composites (FRP) are becoming useful for constructing the world’s infrastructure and to rehabilitate and strengthen our existing structures. The utilization of FRP is quickly gaining popularity because of its higher strength to weight ratio as well as its corrosion resistance. Carbon Fiber Reinforced Polymers, CFRP had been widely used in the purpose of strengthening structures either in flexure or in shear. When the shear or flexure resistance needs to be increased for some reasons like change of building use, design mistakes, change in code limitations, etc, CFRP sheets can be used to strengthen the concrete structural element. This research presents an experimental and analytical study for shear strengthening of reinforced concrete inverted T-beams. The main objective of the research is to study the effectiveness of the use of CFRP sheets in shear strengthening of reinforced concrete inverted T-beams in the existence of maximum moment region. An experimental program including eleven test specimens was conducted. The beams were classified into three groups to draw the necessary conclusion for the study parameters. The effects of the selected parameters on the beam shear capacity presented in form of cracking, strain, failure loads comparisons. For insight on the behavior, a non linear finite element analysis was conducted for the test specimens. The analytical beams cracking strain and failure loads were compared to those obtained from experiments. Based on the above study, recommendations for shear strengthening using CFRP composites were drawn.