Strain Softening of High-Performance Fiber-Reinforced Cementitious Composites in Uniaxial Compression

This study investigates the strain softening behavior of high-performance fiber-reinforced cementitious composites (HPFRCCs) under uniaxial compression. HPFRCC mixtures with different compressive strengths ranged from 120 to 170 MPa were prepared. The measurement method of feedback control on loading rate based transverse displacement was applied. Stress-strain and stress-inelastic displacement curves were plotted and analyzed with the results in the literature. It was found that the post-peak energy absorption of HPFRCC considering inelastic deformation was about 3-7 times higher than conventional concrete. Based on the experimental results in the present work, fitting models on post-peak stress-strain/-displacement curves were considering for different aspect ratios proposed. Investigated strain softening & snapback of HPFRCC in compression.Applied feedback control on loading rate based transverse displacement.Formulated stress-strain models for various aspect ratios.HPFRCC exhibits higher postpeak energy than conventional concrete.