The Torsional and Shear Behavior of Steel Fiber Reinforced RC Members

Figures & Tables

Specimen	Yield force (kN)	Yield deflection (mm)	Peak force (kN)	Peak deflection (mm)
FC-Reference	170.02	3.31	267.95	37.58
FC-30SF	114.18	5.31	257.47	26.79
FC-60SF	132.31	5.51	218.24	12.52
F3-30SF	60.11	2.22	104.36	9.66
F3-60SF	73.51	1.74	113.10	12.80
F4-30SF	122.12	3.27	196.23	12.89
F4-60SF	128.13	4.53	204.37	20.11

Group	Specimen	Ultimate Load (kN)	Ultimate Moment (kNm)
Concentric	AL-Reference-0	122.6	0
	AL-Reference-10	99.6	0.99
	AL-Reference-20	95.7	1.91
	AL-Reference-30	92.8	2.77
	Theoretical Result	0	2.78
Eccentric	AL-30SF-0	217.9	0
	AL-30SF-10	140.5	1.41
	AL-30SF-20	105.9	2.12
	AL-30SF-30	99.7	2.99
	Theoretical Result	0	2.78
Eccentric	AL-60SF-0	142.9	0
	AL-60SF-10	99.2	0.99
	AL-60SF-20	97.1	1.94
	AL-60SF-30	93.8	2.81
	Theoretical Result	0	2.79

kg/m³	First Group	Second Group	Third Group
Fine aggregate (0-12mm)	1420	1420	1420
Coarse aggregate (12-28 mm)	510	510	510
Cement	320	320	320
Admixture	6.4	6.4	6.4
Steel fibers	—	30	60
Water/Cement ratio	0.31	0.31	0.31
Compressive strength (MPa)	34	32.6	34.4
Flexural strength (MPa)	59.0	58.3	58.6
Splitting tensile strength (MPa)	32.1	33.2	42.4

Specimens	T_U-Exp	T_{u-mode II}/T_u-exp	T_TS-2018/T_U-Exp	T_AC318-14/T_U-Exp	T_Eurocode-2/T_U-Exp	T_AS3600/T_U-Exp	T_BS8110/T_U-Exp	T_Hsu/T_U-Exp	T_Rauch/T_U-Exp
T-Reference	5.37	-	0.67	0.67	0.70	0.86	0.47	1.12	1.24
T30SF	7.50	0.58	0.48	0.48	0.50	0.62	0.34	0.79	0.89
T60SF	11.06	0.40	0.33	0.32	0.34	0.42	0.23	0.55	0.60

Specimens	V_u-Exp (kN)	V_n-ACI (kN)	V ( n − A C I ) / V ( u − E x p )	V n − E U 2 ( k N )	V ( n − E U 2 ) / V ( u − E x p )	Energy Dissipation Capacity (kNmm)
FC-Reference	267.95	64.89	0.24	72.84	0.27	1302.7
FC-30SF	257.47	64.19	0.25	72.84	0.28	5726.1
FC-60SF	218.24	65.09	0.30	72.84	0.33	1122.3
F3-30SF	104.36	64.19	0.62	72.84	0.70	266.3
F3-60SF	113.10	65.09	0.58	72.84	0.64	226.4
F4-30SF	196.23	64.19	0.33	72.84	0.37	887.6
F4-60SF	204.37	65.09	0.32	72.84	0.36	1313.8

Specimens	Steel Fibers (kg/m³)	Loading Type
T-Reference	—	Torsion
T30SF	30	Torsion
T60SF	60	Torsion
FC-Reference	—	Overhanging
FC-30SF	30	Overhanging
FC-60SF	60	Overhanging
F3-30SF	30	Three-point bending
F3-60SF	60	Three-point bending
F4-30SF	30	Four-point bending
F4-60SF	60	Four-point bending
AL-Reference-0	—	Axial load without eccentricity
AL-Reference-10	—	Axial load with 10 mm eccentricity
AL-Reference-20	—	Axial load with 20 mm eccentricity
AL-Reference-30	—	Axial load with 30 mm eccentricity
AL-30SF-0	30	Axial load without eccentricity
AL-30SF-10	30	Axial load with 10 mm eccentricity
AL-30SF-20	30	Axial load with 20 mm eccentricity
AL-30SF-30	30	Axial load with 30 mm eccentricity
AL-60SF-0	60	Axial load without eccentricity
AL-60SF-10	60	Axial load with 10 mm eccentricity
AL-60SF-20	60	Axial load with 20 mm eccentricity
AL-60SF-30	60	Axial load with 30 mm eccentricity

Chemical properties (%)		Physical and mechanical properties
SO₃	2.84	2 days Compressive strength (MPa)	27.90
MgO	2.58	28 days Compressive strength (MPa)	58.00
CaO	63.65	Initial setting time (min)	151
Al₂O₃	4.48	Final setting time (min)	191
K₂O	0.62	Specific gravity (g/cm³)	3.12
SiO₂	18.10	Specific surface (cm²/g)	3690
Na₂O	0.21	Total volume exp. (mm)	1.0
Fe₂O₃	3.09	Water requirement of cement (%)	29.5
CI-	0.015	Fineness (%)	7.15

Specimens	T_u (kNm)	θ_u (deg/m)	T_cr (kNm)	θ_cr (deg/m)	θ_yeld (deg/m)	μθ	Energy Dissipation Capacity (kN.deg)
T-Reference	5.37	2.55	0.29	1.60	2.14	1.19	12.02
T30SF	7.50	3.06	0.50	1.62	2.46	1.24	20.17
T60SF	11.06	5.58	0.60	1.31	4.30	1.30	54.72