Steel Fiber Reinforced Concrete(SFRC) is a useful material with high tensile strength, flexural strength and toughness. However, it is known that tensile strength and flexural strength of SFRC components decrease as component sizes increase. In this paper, experimental and analytical studies were performed to investigate the influence of specimen sizes on the tensile characteristics of SFRC. The analytical study is based on a fracture mechanics concept and an estimation of tensile stress-strain relationship by means of a flexural analysis considering the tensile resistance of SFRC on a standard beam specimen. The size effect of tensile stress-strain relationship was considered by means of reducing both of the stress and the strain by the ratio of flexural strength to the standard beam specimen. Flexural tests of SFRC beam specimens were performed to investigate the applicability of this method. As the results, the reasonable agreement was obtained between the measurements and the calculations on the load-displacement relationships.
