Fatigue Strength Toughness Indices of Fiber Reinforced Concrete

Abstract

This paper presents test data on the flexural fatigue strength and toughness indices of concrete reinforced with three types of metallic and one type of synthetic fuber in volume percentages ranging from 0.1 to 2.0. The beams reinforced with metallic fibers exhibited greater fatigue strength than beams reinforced with synthetic fibers. The fatigue strength increased with fiber volume percentage for each type of fiber. The fatigue strength of the beams varied with the deformed shape of the metallic fibers. The toughness indices of the fiber reinforced beams were computed from the area under the static load deflection curve. The toughness indices for two of the three type of metallic fiber reinforced beams were greater than for the synthetic fiber reinforced beams. The toughness indices increased with fiber volume percentage.