Rotation capacity of self-compacting steel fiber reinforced concrete beams
article
Steel fibers are known to enhance the toughness of concrete in compression and in tension. Steel fibers also improve the bond properties between concrete matrix and reinforcing steel bars. In order to investigate the effect of steel fibers on the rotation capacity of reinforced concrete members, four simply supported beams were loaded in three-point bending up to failure (steel bar rupture or concrete crushing). Test variables were fiber content and axial normal force. Remarkably, the specimens without fibers had a larger rotation capacity than those with fibers. This decrease in deformation capacity is explained by localization of the deformations in one large crack in case of the steel fiber reinforced specimens, compared to several large cracks in case of the reinforced concrete specimens. A model to calculate the rotation capacity of self-compacting steel fiber reinforced concrete (SCSFRC) members is discussed and validated against the beam test results.
Topics
TNO Identifier
300172
Source
Studies and Researches, pp. 1-30.
Pages
1-30
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