Load-displacement characteristics of self-compacting steel fiber reinforced concrete beams

Abstract

Measurements of ductility in steel-fiber (SF)-reinforced self-compacting concrete (SCC) are rarely studied, despite the fact that many studies have concentrated on enhancing our understanding of the ductility index of the reinforced concrete element. The objective of this analysis is to evaluate the resilience of SCC beams strengthened with SF in the face of impact loads. All together, twelve reinforced SCC beams (six beams per set) were subjected to flexural tests (with and without steel fibers). In this investigation, the use of three different concrete strengths (designated as M30, M60, and M90) and two different steel ratios (qmin and qmax.) were carried out. The ductility Energy index (μE). of the experimented SCC beams is calculated from the load–displacement curves (P). The results demonstrate that beam deformation and the resulting restricted cracking can be avoided thanks to the increased flexural toughness of the fibrous self-compacting concrete beam samples. Fibrous material growth to SCC is also shown to be highly efficient. Its flexural strength, ductility index, and energy dissipation rate are all ductility energy index (μE.). Steel fibre content, steel reinforcement to concrete, and concrete compressive strength all contribute to the material's flexural strength.