The Torsional and Shear Behavior of Steel Fiber Reinforced RC Members

Abstract

Concrete is widely used structural material, all over the world. The excellent versatility, availability, and economy of the concrete makes it a pioneer of the construction industry when it is compared to other materials. Beams/columns are one of the main structural elements of building to respond to the effects, such as bending moment, shear, and torsion. Thus, it is important to investigate the relevant behaviors of members [1,2]. Steel fibers have been used to improve the characteristic properties of concrete in practice for many years. Besides the commercial use of fibers in concrete technology began in 1970s, particularly in Europe, Japan, and USA. In the structural application, concrete behaves as a brittle material with low tensile strain capacity and with some softening postpeak behavior in compression essentially due to the transverse strain capacity. The use of steel fibers in the

A review on precast structural concrete walls and connections

“…The major stress in load-bearing walls is the axial compression, the bending moment caused by gravity loads is usually small and accidental. The ductility is one of the main parameters to be considered in the structural analysis and to achieve this it is recommended that shear capacity must be greater than the bending capacity (Aydin and Bayrak, 2021).

Figure 9.Loads applied to the wall (ACI 318-19, 2019).

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“…In high-rise buildings, tall walls are usually used, whereas in low-rise buildings squat walls are preferred. Thus, according to the aspect ratio, the walls can be: (i) slender shear wall, dominated by flexion; (ii) intermediate, dominated by the combination of shear and flexion; and (iii) squat shear wall, dominated by shear (ACI 318-19, 2019; Aydin and Bayrak, 2021). Related with the previous topic, the different failure modes of walls under lateral loads are: sliding shear failure; flexure failure; diagonal tension failure; diagonal compression failure and hinge sliding failure (Figure 10).…”

Experimental Study of Hollow RC Beams Strengthened by Steel Fiber under Pure Torsion

“…Despite the fact that the applied load was torsional-flexural, all tested beams failed due to excessive twisting. Abdulkadir et al [16] experimented with RC members with 0, 30, and 60 kg/ m 3 steel fibers under shear, torsion, and axial load. e results indicate that increasing the ratio of steel fibers increases the torsional moment capacity and decreases the shear strength capacity.…”