FLEXURAL FRACTURE AND FATIGUE BEHAVIOR OF STEEL-FIBER-REINFORCED CONCRETE STRUCTURES

Fracture and fatigue tests were performed in order to investigate the fracture and fatigue behavior of steel-fibre-reinforced concrete (SFRC ) structures. 33 SFRC beams were used in the fracture and fatigue test s. The relationship between loading, strain and midspan deflection of the beams was observed under the three-point loading system. From the test results, the effects of the fiber content, fiber aspect ratio and notch-to-depth ratio on the concrete fracture and fatigue behavior we re studied, and the fatigue strengths of SFRC beams were calculated. A ccording to the regression technique, some empirical formulae for pred icting the fatigue strength of SFRC beams were also suggested.