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 | – |