الفهرس 
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Abstract
Geo-grid is a material manufactured from polymers and classified as a geosynthetic material. Nowadays, using geo-grid in reinforced concrete
members sets a new beginning in employing geosynthetic materials in
structural engineering. This research work describes a comparative study of
RC beams reinforced with uniaxial Geogrid and steel fibers in the presence
of flexural reinforcement. Eleven experimentally tested reinforced concrete
beams were chosen to verify this work. ANSYS program was used in the
analysis of the beams. Concrete is modeled as a solid element (SOLID65),
whereas Geogrid and steel fibers were modeled as volumetric ratios.
Comparison between the analytical modeling and experimental results
proved that the FEA software ANSYS can be used effectively to analyze
RC beams in which Geogrid has been added as additional reinforcement.
A parametric study was carried out using eighty-five reinforced concrete
beams. The eighty-five beam specimens may be classified into fifteen
groups. They were modeled using ANSYS Vr (15.0) nonlinear finite
element program. The main studied parameters were the compressive
strength, different values of Geogrid volumetric ratio (3, 4.5, 6, 7.5, and
9%), different volumes of steel fibers (0.5, 0.75, 1, 1.25, 1.5, 2, 2.5 %) and
different Bottom Reinforcement Ratios (0.25, 0.5, 0.75, 1, 1.25, 1.5%).
Addition of uniaxial Geogrids as a reinforcing technique proved to be an
effective tool to improve the flexural behavior of beams and improve the
cracking patterns. Increasing the Geogrid volumetric ratio in reinforced
concrete beams plays a major role in ameliorating their flexural behavior;
since it significantly increased the failure load of specimens even with low
compressive strengths. For low percentages of bottom steel reinforcement,
increasing the volumetric ratio of Georid had a significant effect on
deflection since it decreased by 24.3%. Also, failure load increased by
17%.