Experimental Study on the Shear Performance of RC Beams Reinforced with Different Types of Grids
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2022-06-03
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The thesis starts from the need to identify methods, materials, techniques that can contribute to the reinforcing of the reinforced concrete structure. The thesis presents the results of the experimental investigation on the shear performance of beams reinforced with different types of grids (i) GFRP (Glass Fiber Reinforced Polymers) mesh, (ii) geogrid, and (iii) steel mesh. The experimental work reports the test results of twelve reinforced-concrete (RC) beams reinforced internally, with dimensions of 1200mm in length, 150mm in width, and 200mm in depth, are constructed and tested up to failure using a symmetrical four-point loading system. One beam is considered as a control beam and the other beams are divided into three groups; the first group consist of four beams which is reinforced by GFRP mesh while the second group has three beams reinforced with steel mesh and the remaining beams of the third group, reinforced by Geo-grid materials. Experimental results of load, deflection and failure modes of all the tested beams are obtained. Various parameters are considered in this study including the number of mesh layers, the type of reinforcement material mesh, and the reinforcing configurations. All beams failed in diagonal shear failure due to slip and rupture of mesh. The test results indicate that the beams reinforced using steel mesh as shear reinforcement give high performance than any other specimen where they improve the load-carrying capacity up to 66% higher then that of the control beam. While the development in the ultimate load for reinforced beams using GFRP ranges from 1% to 18% compared to the control beam. finally, the experimental results show Insufficient improvement in the ultimate load for beams that reinforced using Geo-grid type