Crack Arresting Mechanism Of Fiber ReinforcedConcrete

The cracking arresting property of FRC has been well proved by a lot of experiments and has been applied extensively. This paper tends to propose a more rational interpretation to the mechanism of FRC. The K-superposition method has been improved in this paper to interpret the crack arresting mechanism of fiber reinforced concrete. A simple and direct approach has been introduced based on the Linear Elastic Fracture Mechanics (LEFM). The behavior of fibers in the process of crack arresting has been revealed fundamentally. It has been shown that the stress intensity factor due to the fiber is extremely great at the moment the fiber just strides cross the crack, which greatly reduces the total amount of the stress intensity factor of FRC.