الفهرس 
Historical BackgroundOnly 14 pages are availabe for public view
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Abstract
Near-Surface mounted (NSM) reinforcement techniques using traditional or advanced composite materials such as fiber-reinforced polymer (FRP) bars or strips are being increasingly recognized as a valid alternative to externally bonded laminates for enhancing flexural and shear strength of deficient concrete structures. As this technology emerges, the structural behavior of strengthened reinforced concrete (RC) elements strengthened using NSM technique needs to be fully characterized. In this research, an experimental program consists of testing sixteen RC deep beams (two control deep beams and fourteen strengthened deep beams). Steel bars, steel plates, carbon fiber reinforced polymer CFRP, and glass fiber reinforced polymer GFRP were used for shear strengthening of tested beams using NSM technique. The investigated variables in this study were strengthening material, strengthening pattern, and end anchorage of the rods. Beam models were tested and subjected to incremental loads till failure. Performance of the tested beams and modes of failure were presented and discussed in this research. The test results confirm that NSM technique can be used significantly to increase the shear capacity of RC deep beams, with different efficiency that varies depending on the selected variables.