https://orcid.org/0000-0002-2611-7464
ABSTRACT
The particle shape of rockfill materials varies greatly, and their dynamic characteristics under cyclic loading are important parameters in dynamic response analysis and construction design. In this study, three types of artificial rockfills with different particle shapes (cylinder, cube, and prism) were prepared by the cement slurry casting method. Cyclic triaxial tests were conducted to investigate the effects of confining pressure, loading frequency, and consolidation stress ratio on the dynamic behavior and particle breakage characteristics of artificial rockfill (AR). It was found that the prepared AR can approximately simulate the shear modulus and damping ratio of natural rockfill. The shear modulus decreased with the increase of particle shape coefficient regularity. The maximum shear modulus and the particle shape coefficient regularity can be approximately fitted by a power function. Particle shape does not affect the relationship between the normalized shear modulus and normalized shear strain, whereas it has an impact on the damping ratio of AR. The larger the confining pressure and the larger the particle shape coefficient, the more significant the particle breakage is.
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Technical Manuscript
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