Flexural Analysis of Reinforced Concrete Beams Containing Steel Fibers

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Abstract
The flexural behavior of reinforced concrete beams containing steel fibers is investigated in the present study. An experimental program was set up and nine reinforced concrete beams have been tested, including two series of singly reinforced concrete beams and one series of doubly reinforced concrete beams. The fiber contents of reinforced concrete beams for each series were 0%, 1%, and 2% by volume. The load was applied in four‐point flexural loading condition. The deflections and the steel and concrete strains were automatically measured at the various locations. The crack widths and crack spacings at each loading step were observed during the loading process. It was found from these measurements that the crack widths increase almost linearly with the increase of steel stress and the crack widths at the same loading stages are greatly reduced as the content of steel fibers increases. The present study also indicates that the ductility and the ultimate resistance are remarkably enhanced due to the addit...

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