الفهرس 
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Abstract
The aim of this work is to study the behavior of R.C. beams reinforced with
smart reinforcement. These new strengthening methods were experimentally
investigated for simply supported concrete beams provided with internal injected
ducts and /or super elastic Nitinol bars under static load in two cycles (loading – off
loading) up to failure with different shear or flexural reinforcement ratio. It functions
once it receives the signal from crack sensors to measure (crack width and strains) in
order to commence the injection smart repair or epoxy material into these cracks.
Twenty-Four reinforced concrete beams were prepared. These beams were divided
into six groups. In each group, the effect of one variable was taken into consideration
while the other parameters were kept constant.
The studied parameters were the type of strengthening technique and shear or
flexural reinforcement ratios and beam span length. The effect of these techniques on
the cracking -ultimate loads, deflections, concrete, steel and Nitinol smart bar strain as
well as on ductility and stiffness for all tested beams.
Interested results that are important for structural engineers were noticed and
given in form of charts and curves. Also the mathematical and Finite Element
modeling results for predicting ultimate loads for such beams were given. Finally,
some important conclusions and recommendations were drawn out.