For determining the performance classes of steel fiber reinforced concretes (SFRCs), their equivalent flexural strength values were investigated according to both Serviceability Limit State and Ultimate Limit State. For a certain concrete class, the equivalent flexural tensile strengths depend on…
For determining the performance classes of steel fiber reinforced concretes (SFRCs), their equivalent flexural strength values were investigated according to both Serviceability Limit State and Ultimate Limit State. For a certain concrete class, the equivalent flexural tensile strengths depend on both the fiber vol- ume fraction and the fiber aspect ratio. The mixtures with the longer steel fibers provide higher equivalent flex- ural tensile strength values than those of shorter ones. Performance classification of SFRCs can be made ac- cording to the parameters of concrete strength, and the volume fraction and the aspect ratio of steel fibers. In order to obtain optimum solutions; equivalent flexural strengths, splitting tensile strength, fracture energy were maximized and cost of fibers were minimized simultaneously. Thus, numerical optimization was used to opti- mize any combination of either factors or responses.