ABSTRACT
This paper focuses on the assessment of the technical viability of fiber reinforced concrete (FRC) with structural responsibility in tunnel segmental linings. An analysis of historical information about tunnels built with FRC shows the typical geometry and reinforcement strategy used. An extensive parametric study with several tunnel geometries and boundary conditions was conducted using two different design approaches: beam model and numerical continuum model. The results show the differences between these approaches and support the proposal of a graphic representation of normal and bending actions, delimiting zones that favor the application of fibers either in partial or full substitution of traditional reinforcement. The graphic representation allows a rapid assessment of the viability of using FRC in segmental lining with positive repercussion on the future application of the material and the confidence of designers, contractors and project owners.
