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

Table 11

Effect of the main reinforcement number on cracking and ultimate torsional moment.

Beam no.	Vf %	No. of longitudinal steel reinforcement	Cracking torque (Tcr) (kN.m)	Increase in Tcr according to H2 and H3 (%)	Ultimate torque (Tu) (kN.m)	Increase in Tu according to H2 and H3 (%)
H2	0.5	4	15.77	—	26.24	—
H5	0.5	6	16.35	3.68	44.37	69.09
H7	0.5	8	17.18	8.94	44.94	71.27
H3	0.75	4	17.59	—	29.51	—
H6	0.75	6	18.50	5.17	47.94	62.45
H8	0.75	8	19.17	8.98	49.79	68.72