Fracture Energy of Steel Fiber Reinforced High Strength Concrete
Through the three-point bending test on the specimens of steel fiber reinforced high strength concrete (SFHSC) and plain high strength concrete (HSC) with the size of 100 mm×100 mm×515 mm, the effects of influencing factors including the fiber volume fraction (ρf) and relative notch depth (a/W) upon the fracture energy and the work of applied force (gravity and external force) were studied. The results show that the effect of ρf upon the fracture energy is more obvious; the variation tendencies for the increment ratio of the fracture energy and that of the work of applied force are different under different factors; the fracture energy is dependent on the work of external force. Based on the test results, the formula was established for calculating the fracture energy.
T. Y. Zhang et al., "Fracture Energy of Steel Fiber Reinforced High Strength Concrete", Advanced Materials Research, Vols. 168-170, pp. 2230-2234, 2011