Moment-Curvature Relationships for Concrete Beams with Plain and Deformed Steel Fibers

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Title: Moment-Curvature Relationships for Concrete Beams with Plain and Deformed Steel Fibers

Author(s): Grant T. Halvorsen and Clyde E. Kesler

Publication: Journal Proceedings

Volume: 76

Issue: 6

Appears on pages(s): 697-706

Keywords: beams (supports); deformation; ductility; fiber reinforced concretes; flexural strength;flexural tests; moment-curvature relationships; research.

Date: 6/1/1979

Abstract:
Failure of steel fiber reinforced concrete beams is typically characterized by cracking of the matrix followed by pullout of the individual fibers. To compare the behavior of concrete reinforced with plain and deformed steel fibers, moment-curvature relationships were determined experimentally for flexural specimens, 4 x 6 x 64 in. (100 x 150 x 1625 mm). Two fiber contents with each of six fiber geometries were used. The results indicate that the post-cracking resistance may vary considerably, depending on the fiber ductility and the failure mode of individual fibers, as well as fiber content. Clearly, fiber reinforced concrete cannot be adequately described by strength alone.