الفهرس 
Shear Behavior Of Reinforced Concrete Beams Strengthened With FRP Sheets
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Abstract
In this research,numerical investigation for evaluating shear strength of FRP reinforced concrete beams is conducted using ANSYS concept software programs. Using fiber-reinforced polymers (FRP) composites that are bonded externally has been a common structural strengthening method through the previous two decades, because of the familiar advantages of the fiber reinforced polymers, such as the high strength to depth ratio and good corrosion resistance. An extensive investigation into the analysis, behavior, and design of reinforced concrete beams strengthenedwith FRP sheets is included in this study. Particularly, there are three components that contribute to the shear strength of a strengthened reinforced concrete beam: concrete, internal steel reinforcing, and FRP sheets. This study examines the effects of shear interaction between these three components. Numerical investigation for evaluating shear strength of FRP reinforced concrete beams is conducted using ANSYS concept software programs. Specimens available in the literature are used for verification of the numerical models. Comprehensive parametric research is carried out in order to examine the impact of a wide range of parameters on the shear behavior of reinforced concrete beams strengthened with CFRP sheets. These parameters include the concrete compressive strength (f_cu), longitudinal reinforcement (A_sl), distribution of stirrups(S), number of plies of CFRP and (n_f), orientation angle of CFRP (θ_f) and the ratio of shear span to depth(L/d). The results of the finite element programs are compared to those estimated according to the ACI, CSA and ECP codes. Shear strength calculations and shear reinforcement which may be required for design of FRP reinforced concrete beam according to (ACI), (CSA) and (ECP) are presented and compared to the numerical results.The presented numerical model is evaluated in comparison to previously published experimental tests. The results of the numerical model are considered to be extremely reliable compared to the experimental results. The main contribution of this study is that it demonstrates that ANSYS could produce results in good agreement with previously published test results. It can therefore be confidently used in design and analysis situations. In addition, the use of CFRP sheets can improve the strength and stiffness of the reinforced concrete beams as well.