Research at structural concrete laboratory
Ultra-High Performance Fiber Reinforced Concrete Structures
Research on the behaviour of ultra-high performance fiber-reinforced
concrete members has demonstrated that thin members can be effective
without ordinary reinforcement thanks to their good deformation
capacity in bending and their excellent shear strength.
For elements with larger dimensions (starting at 100 mm), it is advisable to use ordinary passive or even prestressed reinforcement. In these cases, research showed that the strength of the reinforcement can be superimposed to that of the fibers, as long as the behavior of the fiber-reinforced concrete presents a hardening component (localization of the cracks for strains exceeding the yield strain of conventional reinforcement). However, it was observed that the localization of cracks can lead to a sub-optimal behavior at the ultimate limit state, because of a limited deformation capacity.