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AI InsightHowever, the additional shear resistance provided by polypropylene fibers was not sufficient to overcome the shear demand and change the failure mode from shear to flexure.
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Abstract
Numerous researches have focused on the contribution of steel fibers to the shear and flexural behavior of reinforced concrete (RC) beams without web reinforcement. While it has been shown that the addition of steel fibers makes concrete tougher and more ductile, there exists a relatively limited amount of studies concerning the shear behavior of polypropylene fiber reinforced concrete (PFRC) beams. For this purpose, an experimental program was carried out for investigating the shear behavior of PFRC beams. This paper presents the test results of PFRC beams with and without web reinforcement. It is shown that the use of polypropylene fibers improved the shear capacities of RC beams. However, the additional shear resistance provided by polypropylene fibers was not sufficient to overcome the shear demand and change the failure mode from shear to flexure.