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

Table 8

Effect of stirrups spacing on the twist angle.

Beam no.	Spacing of stirrups (mm) (c/c)	Vf %	Maximum twist angle (Ø) (degree %)	Decrease in Ø according to H11 and H12 (%)
H11	150	0.5	9.8	—
H2	100	0.5	10.85	10.71
H9	60	0.5	14.04	46.94
H12	150	0.75	10.2	—
H3	100	0.75	12.87	26.18
H10	60	0.75	15.18	48.82