Shear Strength of Prestressed Steel Fiber Concrete I-Beams

International Journal of Concrete Structures and Materials

Table 1 Test variables of PSFC I-Beam.

Beam ID	Designed mode of failure	Concrete compressive strength (MPa) ksi	Volume of steel fiber reinforcement V _f	Fiber factor [(L _f/D _f)V _f]/100
R1	Web shear	86.9 (12.6)	0.5 % LF	0.40
R2	Web shear	90.4 (13.1)	1 % SF	0.55
R3	Web shear	82.1 (11.9)	1.5 % SF	0.825
R4	Web shear	73.1 (10.6)	1.5 % SF + 0.5 % LF	0.825 + 0.40 = 1.225
R5	Flexural shear	84.2 (12.2)	0.5 % LF	0.40
R6	Flexural shear	88.3 (12.8)	1.5 % SF + 0.5 % LF	0.825 + 0.40 = 1.225

LF long fibers, L _f /D _f 80, SF short fibers, L _f /D _f 55, L _f length of steel fiber, D _f diameter of steel fiber.