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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Cyclic Shear Behavior of Connection between Precast Beam and Deck with Steel Fiber-Reinforced Concrete
Author(s): D.L. Araujo and M.K. El Debs
Publication: Special Publication
Appears on pages(s): 371-388
Keywords: connection; cyclic shear load; precast concrete; steel fiber-reinforced concrete
Abstract:The connection between precast beam and deck is formed by steel bar associated with a shear key. The steel bar is bent in hoop form and is inserted in the pocket in deck, which is filled by cast-in-place concrete. The strength of cast-in-place concrete varied from 65 MPa to 90 MPa, and a maximum volume of 1.50 % short steel fibers was added. The tests were carried out in push-out specimens submitted to three stages of no reversed cyclic load. Connections submitted to 40% of their ultimate strength show lower shear stiffness degradation when steel fibers were added. After twenty cycles of loading and unloading, the connection with fibers still maintained 85% of its initial stiffness, whereas the connection without fibers retained only 75% of its initial stiffness. The volume of fibers did not influence the stiffness degradation due to void in the cast-in-place concrete introduced by fibers. The diameter of the connector had little influence on the stiffness degradation, independent of the presence of the fibers. The addition of 1.5% of fibers to the concrete cast in the pockets also increased the ultimate shear strength of the connection up to 42% when connector of 12.5 mm diameter was used.
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