A Review of Fatigue Performance of Fiber Mixture with Concrete

Abstract

The fatigue performance of fiber reinforced concrete is a research hotspot in the field of civil engineering. This paper systematically reviews the related research. The fatigue performance of fiber reinforced concrete is different from that of ordinary concrete because the internal structure is changed by the addition of fiber. Different kinds of fibers have different effects on fatigue performance. Steel fiber can enhance the toughness of the matrix, effectively hinder crack propagation, and significantly improve the fatigue life. Synthetic fibers have obvious effects in inhibiting early microcracks, and the mixed use of the two will produce complementary phenomena. Among them, steel fiber has the greatest improvement in the mechanical properties of concrete, with an average increase of 30.5%-41.7%. Glass fiber and synthetic fiber have improved the mechanical properties of concrete, with an increase of 10.5%-14.6%. Among them, the improvement of mixed fiber is significantly higher than that of single fiber and the mechanical properties are improved by about 45%-59.2%. The existing research mostly focuses on experimental analysis, numerical simulation is relatively less, and the research on long-term fatigue performance in practical engineering applications is still insufficient. In the future, it is necessary to strengthen multi-scale research, improve numerical models, and deeply explore its fatigue behavior in complex environments, so as to provide more solid theoretical support for engineering applications.