الفهرس 
ABSTRACT
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Abstract
An experimental program was conducted including twelve reinforced concrete two-span continuous deep beams. All tested beams were fabricated, instrumented and then tested to failure under the effect of two concentrated loads one being placed at the center line of each span. All beams were made using high strength concrete. The main objective of this study was to investigate the behavior of two – span continuous deep beams within the whole range of loading starting from the elastic range up to the failure of each beam. Many significant factors were considered such as: Percentage of web reinforcement (ρh), Positions and Number of openings being placed within the interior or exterior shear spans and in flexural region. Furthermore, the effect of strengthening of two – span continuous deep beams on its behavior was considered in the case of beams provided with openings. The strengthening technique considered was bonding exterior glass fiber reinforced polymers (GFRP).Strengthening schemes were considered including bonding GFRP strips in the horizontal and vertical directions around the openings. For all tested beams, deflections, strains in the longitudinal reinforcement, and strains in concrete were measured and recorded. Also, the initiation and propagation of cracks were recorded. Cracking patterns and failure modes were observed. Cracking and failure loads were recorded. Test results revealed the significant effect of the Percentage of web reinforcement and the presence of openings on the shear behavior of tested two – span continuous deep beams. The test results showed that the presence of the openings in flexural regions of continuous deep beams have no significant effect on behavior of tested two – span continuous deep beams. Therefore, these regions are suitable for providing openings when required.