Behavior of Steel Fiber Self-Compacting Concrete Hollow Deep Beams Under Torque

Abstract

The purpose of this paper was concerned of the behavior of six samples of deep beams under the influence of pure torsion. Such samples were self-compacting concrete (SCC) and two ratios of Steel Fibers (SF (were also added (0.75 % and 1.5 %). This study examined the behavior of the samples when pure torsion was applied and reacted to angles of torsion, longitudinal strains and concrete strains. It was obvious from the results of the test that the addition of steel fiber to the SCC mixture increased the strength of the compression and tensile strength, which increased the hardness of the samples, thereby decreasing the response of the samples to the angle of twisting, longitudinal strains of concrete and concrete strains.

Structural Behavior of Reinforced Concrete Deep Beams with Inclined Circular Holes

“…Recently, there have been efforts to study the behavior of concrete beams with longitudinal openings as follows Murtada and Yahyia [17] investigated the structural behavior of shallow self-compacting beams when the diameter of the holes was changed, and it was found that the ultimate load decreases with the increase in the diameter of the holes. Muhanad and Saad [18] Hadi et al [19] They found that circular holes are better than rectangular when used in deep beams to make longitudinal holes. Haider and Mortada [20] find that parabola shapes are better than round when used in the longitudinal holes of the T-beams.…”