A numerical model with an explicit representation of steel fibers for modeling SFRC beams subjected to torsion

Resumo

A numerical model with a discrete and explicit representation of steel fibers is used for modeling steel
fiber reinforced concrete (SFRC) beams subjected to torsion. The numerical model is a combination of a fiber
cloud, cement matrix, and the fiber-matrix interaction. It is well known that the addition of steel fibers to concrete
increases the torsional and rotational strength, in addition to greater cracking control. In this context, this work
aims to assess the capability of the numerical model to simulate experimental tests available in the literature of
SFRC beams under torsion with steel fiber rates of 25 kg/m3 and 50 kg/m3. The results demonstrated that the
numerical model proposed is appropriate to represent the failure process of beams under torsion and the numerical
tool can be very useful in future studies in combination with analytical equations proposed by standard codes.