Studies on Ductility of Reinforced Concrete Beams in Shear
Abstract
Studies On Ductility Of Reinforced Concrete Beams In Shear paper presents an experimental investigation on the strength of bubbled wide reinforced concrete beams with different types of shear steel plates. Eight specimens with dimensions of 215x560x1800mm were investigated. The studied variables deal with replacement of 10mm stirrups diameter stirrups spaced at 125mm by shear steel plates having equivalent cross-sectional area for stirrups at mid legs height with circular opening of different thicknesses (3, 4 and 5mm).
Four specimens were without any bubbles and the others with bubbles. This study showed that the shear steel plates is a good alternative for replacing the stirrups and gives increasing in yield, ultimate load and deflection (at service load) with 5% , 15% and 9% on the average when using the bubbles.
Conclusion
The effects of the fibers addition on the concrete material and beam elements is evaluated in this paper. The definition of a ductile FRC material, characterized by a sufficient ductility, has been developed and the optimum relationship between concrete matrix and fiber volume ratio is provided. The behavior of beam schemes reinforced with FRC has been evaluated with a simplified analytical mono-dimensional model that allows accounting for the non-linearity of the problem, and with a suitable bi-dimensional numerical program.
