A comprehensive review on the dynamic behavior of granular soils: the role of particle shape
摘要
Dynamic characterization of geomaterials plays a significant role in the design and analysis of geo-structures subjected to cyclic loading and seismic excitation, particularly in seismic-prone areas. Such dynamic features in granular soils are appreciably affected by the shape of their particles. This paper presents a comprehensive review of the existing literature focusing on the influence of particle shape on the dynamic behavior of granular geomaterials. First, commonly used particle shape descriptors for soil granules are reviewed. Then, the impacts of particle shape on dynamic stiffness and attenuation properties of granular soils over a wide range of induced strains, liquefaction susceptibility, the cyclic response of the soil-solid interface, and the dynamic behavior of stabilized soils are critically examined. The findings indicate that, with other influencing parameters held constant, increasing particle angularity leads to reduced liquefaction susceptibility, while the pressure dependency of stiffness and damping, cyclic shear strength of stabilized soils, and soil–solid interface response are enhanced. Finally, the underlying micromechanical mechanisms governing the dependence of dynamic soil behavior on particle morphology are discussed, and directions for future research are identified.