Skip to main content

Table 5 Experimental ultimate strengths at failure for PSFC I-Beams.

From: Shear Strength of Prestressed Steel Fiber Concrete I-Beams

Beam ID and failed end

Steel fiber by volume (%)

Fiber factor

Concrete compressive strength (MPa)

Failure mode

Ultimate shear capacity (kN)

Ultimate moment capacity (kN/m)

Max. shear at ultimate moment (kN)

Max. moment at ultimate shear (kN/m)

R1-North

0.5 % LF

0.40

86.9

Web-shear

1175

–

–

1078

R2-North

1 % SF

0.55

90.4

Web-shear

1250

–

–

1146

R2-South

1 % SF

0.55

90.4

Web-shear

1313

–

–

1205

R3

1.5 % SF

0.825

82.1

Flexure/web-shear

–

1191

1299

–

R4-North (short beam)

1.5 % SF + 0.5 % LF

1.225

73.1

Web-shear

1540

–

–

–

R5-South

0.5 % LF

0.40

84.2

Flexural-shear

472

–

–

1153

R6

1.5 % SF + 0.5 % LF

1.225

88.3

Flexure

–

1243

507

–

  1. 1 MPa = 145 psi, 1 kN = 0.225 kip, 1 kN/m = 0.735 kip-ft.
  2. LF long fibers, SF short fibers.