Bond Constitutive Relationship for Steel Fiber Reinforced Self-Compacting Concrete

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Conference Proceeding
Proceeding for the BOND IN CONCRETE 2012: Bond, Anchorage, Detailing conference, 2012, pp. 931 - 939
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Steel fiber reinforced self-compacting concrete (SFRSCC) is a relatively new composite material which congregates the benefits of the SCC technology with the profits derived from the addition of fiber to a brittle cementitious matrix. Steel fibers improve many of the mechanical properties of self-compacting concrete (SCC) elements including tensile strength, ductility, toughness, energy absorption capacity, and fracture toughness. This paper investigates the bond characteristics between steel fiber and SCC based on the available experimental results. An analytical steel fiber pullout model proposed by Dubey (1999) is modified by considering the different mechanical properties of SCC and different fiber types (smooth, hooked) and in-clination. In order to take into account the effect of the fiber inclination in the pullout model, apparent shear strengths and slip coefficient are incorporated to express the variation of pullout peak load and the augmentation of peak slip as the inclination angle increases. These variables are expressed as functions of the inclination angle.
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