Abstract

The reinforced concrete (RC) shear walls are widely used to serve as the primary lateral load-resisting member in the high-rise buildings. An experimental investigation of the mechanical behaviour of hybrid fibre (carbon and steel) reinforced self-compacting concrete (HFRSCC) shear walls under pure torsion moment is presented in this paper. The nine HFRSCC shear walls with the same longitudinal reinforcement ratio were tested under pure torsion moment and no axial load. The effect of hybrid fibre ratio and horizontal reinforcement amount and aspect ratio on the failure characteristics, torsional behaviour, energy dissipation capacity, ductility of shear walls was studied. Results indicate that both hybrid and horizontal reinforcement ratio are increased the ultimate torsional moment capacity and angle of rotation and that the hybrid fibre ratio is the key parameter that determines the failure mode of the HFRSCC shear walls. Torsional moment capacity increased, when the hybrid fiber ratio rose up from 0% to 1.0% and then 1.5%. However, this increase was larger in case of increasing the hybrid fiber ratio from 0% to 1.0%. Increasing the hybrid fiber ratio from 1.0% to 1.5% did not result in a performance increase as in the first case.

References

[1] Bali I, Hwang SJ. Strength and deflection prediction of double-curvature reinforced concrete squat walls. Structural Engineering and Mechanics 2007; 27(4); 501-521.

[2] Ganesan N, Indira P. High performance fibre reinforced cement concrete slender structural walls. Advances in Concrete Construction 2014; 2(4); 309.

[3] Shah AA, Ribakov Y. Recent trends in steel fibered high-strength concrete. Materials & Design 2011; 32(8-9); 4122-4151.

[4] Ye Y, Hu S, Daio B, Yang S, Liu Z. Mechanical behavior of ultra-high performance concrete reinforced with hybrid different shapes of steel fiber. CICTP 2012: Multimodal Transportation Systems—Convenient, Safe, Cost-Effective, Efficient 2012; 3017-3028.

[5] TBS. Code, Specification for Structures to Built in Seismic Zones Ankara, Turkey; 2018.

[6] ACI-318-19, Building Code Requirements for Structural Concrete and Commentary, Farmington Hills, MI, USA. 2019.

[7] TS802, Turkish Standard -Design of concrete mixes, Ankara, Turkey; 2016.