Abstract
High performance fiber-reinforced cement composites (HPFRCCs) have been designed to exhibit high tensile strength and ductility compared to traditional concrete. HPFRCCs have also shown improved damage tolerance in compression. When reinforced with steel, HPFRCC components have been proposed for enhanced seismic resistance in structural applications. Because of the uncertainty associated with ground motions, determining an appropriate cyclic deformation history for seismic testing of structural components is a challenge. Different cyclic deformation histories have resulted in different cracking patterns in previous HPFRCC component tests. Several different cyclic loading protocols have been used in previous studies, but the deformation history itself has rarely been treated as a test variable. Two reinforced HPFRCC beams and two reference specimens made of reinforced concrete were tested under two different cyclic loading protocols. Cracking patterns, strain in the steel reinforcement, and hysteresis behavior were monitored through failure. The reinforced HPFRCC beams responded differently to different deformation histories than the reinforced concrete beams in terms of ductility and the amount of energy dissipated. Results from this study will contribute to a better understanding of reinforced HPFRCC component behavior under various cyclic deformation histories.
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