Bond Performance of Reinforcing Bars Embedded in Fiber Reinforced Concrete and Subjected to Monotonic and Cyclic Loadsby A. Samer Ezeldin, Stevens Inst of Technology, United States,
Perumalsamy N. Balaguru, Stevens Inst of Technology, United States,
Abstract: The primary variables investigated were fiber content and loading history. The reinforcing bar size was ASTM #5. Steel fibers with hooked ends were used with four fiber contents, namely; 0, 50, 75, and 100 lb/cyd. The loading pattern consisted of monotonic, half cyclic, and reversed cyclic pullout loads. The tests were conducted using a modified pullout specimen in which the concrete surrounding the rebar was in tension. The following conclusions can be drawn using the results obtained: i) The fibers provide a major contribution to the ductility of concrete when subjected to monotonic or cyclic pullout loads, ii) for half cyclic loading, the monotonic load-slip curve envelopes the cyclic response, and iii) for reversed cyclic loading the monotonic curve does not represent the envelope of the cyclic response.
Subject Headings: Cyclic loads | Fiber reinforced concrete | Load history | Bars (structure) | Load tests | Fabrics | Pullout behavior | History
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