EFFECT OF DEFORMATION HISTORY ON STEEL-REINFORCED HPFRCC FLEXURAL MEMBER BEHAVIOR

Author(s): T.E. Frank, M.D. Lepech and S.L. Billington
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 367-374
Total Pages: 8
Language: English

Abstract: High-performance fiber-reinforced cementitious composites (HPFRCCs) show promise for use in seismic applications. Structural configurations varying in geometry and material properties have been investigated to understand their behavior and failure modes under reverse cyclic loading. The influence of cyclic deformation history on component performance has not been investigated. Variations in deformation history may influence multiple cracking behavior or strain accumulation in steel reinforcement. This study investigates the behavior and failure modes of steel-reinforced HPFRCC flexural members subjected to different reverse cyclic deformation histories. Parameters of the loading protocol under investigation include the presence or absence of initial pulses, the amplitude of initial pulses, and the number of cycles per step. The results of five nominally identical flexural members of reinforced Engineered Cementitious Composite (ECC), a type of HPFRCC, tested to failure under varying loading protocols are presented herein. All specimens reached between 12-17% drift with little strength degradation prior to failure by longitudinal reinforcement fracture. Small inelastic initial deformation pulses increased tensile strain accumulation in the reinforcement, whereas larger initial pulses led to high strains that quickly reduced with splitting crack formation and subsequent debonding. Cracking was more well-distributed when a larger number of cycles were applied prior to crack localization.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00