The shape of stress-strain curve of fiber concrete in uniaxial tension strongly depends on the amount and type of the used fibers. Since even a small change in dosage causes serious variation of the stress- strain curve, the numerical interpretation…
The shape of stress-strain curve of fiber concrete in uniaxial tension strongly depends on the amount and type of the used fibers. Since even a small change in dosage causes serious variation of the stress- strain curve, the numerical interpretation of the stress-strain curve should be robust enough to cover the subtle differences which in turn affect significantly the performance of the entire structure. This paper describes an alternative approach to definition of the stress-strain curve using the fuzzy logic. The proposed tools allow de- finition of smooth curves, whose shape can be easily corrected by experts’ intervention if necessary. This ap- proach can also help to overcome the lack of experimental data. The method is explained in examples.