Determination of equivalent fracture toughness and tensile strength of steel fibre reinforced cementitious composite based on boundary effect model

•A theoretical method for determining KIC and ft simultaneously of SFRC was proposed.•The orientation of steel fiber was considered by introducing a discrete number.•Combination effect of parameters and orientation of steel fiber on cracking were discussion.•SFRC specimens with different depths verified the proposed method.•Full failure curves for steel fibre reinforced cementitious composite were constructed.