抄録
The fracture mechanics is applied in order to quantify mechanisms and effects of fiber reinforcement in fiber reinforced concretes. In this paper, experimental and analytical investigations were conducted to evaluate tension-softening relations of fiber reinforced concretes by means of a reverse analysis of the cohesive force model and the followings were quantified ; effects of different types of fiber on fiber reinforcement, interactions of factors of mix proportion such as fiber length, fiber volume fraction and matrix strength on fracture toughness of steel fiber reinforced concretes, and effects of fiber reinforcement on restraints of expansion degradation for concretes.
