الفهرس 
Literature ReviewOnly 14 pages are availabe for public view
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Abstract
Many factors affect the shear behavior of reinforced concrete beams including concrete strength which is changed between normal, medium, and high strength concrete. High strength concrete has been used in several applications in the last decades and the demand of high strength concrete beams has increased recently because of its benefit in decreasing dead loads, members dimensions and cost of construction, consequently manufacturing of high strength concrete became easier.
The shear resistance of reinforced concrete beams has been a well-known research subject over the last several decades. The study of shear resistance in the case of T-beams, however, is limited. In international codes such as ACI Building Code and the Euro-code, the shear force in a T-beam is assumed to be carried only by its web. This simplified assumption, however, which has prevailed in the shear design practice, is necessarily.
This research program evaluates the shear behavior of high-strength reinforced concrete T-beams. A total of six reinforced concrete beams (one beam with rectangular section and five beams with T-section) were tested under static loading conditions. The main variables in the study were flange width and the shear span-to-depth ratio.
The thesis also presents an analytical model that evaluates the applicability of Strut-and-Tie method for high-strength reinforced concrete T-beams. The analysis was extended to include detailed comparisons with various domestic and international codes and standards.
Research findings indicate that shear strength of T-beams is higher than the shear strength of the rectangular beams, but presence of flange or increasing it for beams having the same shear span to depth ratio does not reduce shear crack width and does not significantly affect stirrups strain, while decreasing shear span to depth ratio for beams having the same flange width reduce shear crack width and affect significantly stirrups strain. Analysis shows that the ACI 318-05 and ECCS -2003 design codes can conservatively be used for the design of T-beams with high-strength concrete, also analysis shows that using the Strut-and-Tie method can be used to predict well the shear strength of high-strength reinforced concrete T-beams.