A simple, effective, and practical constitutive model for cohesive fracture of fiber reinforced concrete is proposed by differentiating the aggregate bridging zone and the fiber bridging zone. The aggregate bridging zone is related to the total fracture energy of plain concrete, while the fiber bridging zone is associated with the difference between the total fracture energy of fiber reinforced concrete and the total fracture energy of plain concrete. The cohesive fracture model is defined by experimental fracture parameters, which are obtained through three-point bending and split tensile tests. As expected, the model describes fracture behavior of plain concrete beams. In addition, it predicts the fracture behavior of either fiber reinforced concrete beams or a combination of plain and fiber reinforced concrete functionally layered in a single beam specimen. The validated model is also applied to investigate continuously, functionally graded fiber reinforced concrete composites.
Bibliographical noteFunding Information:
The authors would like to acknowledge support from the National Science Foundation (NSF) through grant CMMI # 0800805 . We also acknowledge support through the Center of Excellence for Airport Technology (CEAT) provided by the O'Hare Modernization Program (OMP) and the City of Chicago for their financial support in this study. The information presented in this paper is the sole opinion of the authors and does not necessarily reflect the views of the sponsoring agencies.
All Science Journal Classification (ASJC) codes
- Building and Construction
- Materials Science(all)