A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Particle-void fabric and effective stress reduction in cyclic liquefaction of granular soils
Abstract During undrained cyclic loading, granular soils undergo the reduction of effective stress in the constant volume condition. Revealing the evolution of particle-void fabric in accompany with effective stress reduction provides a significant insight into the fundamental mechanism of cyclic liquefaction. In this study, numerical tests were conducted in DEM simulations to explore the cyclic liquefaction of granular packings with different particle size distributions and void ratios. With the decrease of mean effective stress p' during cyclic liquefaction process, the decrease of particle-void descriptor Ed can be observed for all packings. From micromechanical perspective, large size voids are redistributed and local void distribution around particle becomes relative uniform. The change of particle-void fabric from consolidated state to initial liquefaction state is irrelevant to density of the packing. A power function is further adopted to describe the positive correlation between Ed and p'.
Highlights During cyclic liquefaction process, large size voids are redistributed and local void distribution around particle becomes relative uniform. A positive correlation exists between particle-void descriptor Ed and mean effective stress p', which can be further fitted by a power function. The change of particle-void fabric from consolidated state to initial liquefaction state is irrelevant to density of the packing.
Particle-void fabric and effective stress reduction in cyclic liquefaction of granular soils
Abstract During undrained cyclic loading, granular soils undergo the reduction of effective stress in the constant volume condition. Revealing the evolution of particle-void fabric in accompany with effective stress reduction provides a significant insight into the fundamental mechanism of cyclic liquefaction. In this study, numerical tests were conducted in DEM simulations to explore the cyclic liquefaction of granular packings with different particle size distributions and void ratios. With the decrease of mean effective stress p' during cyclic liquefaction process, the decrease of particle-void descriptor Ed can be observed for all packings. From micromechanical perspective, large size voids are redistributed and local void distribution around particle becomes relative uniform. The change of particle-void fabric from consolidated state to initial liquefaction state is irrelevant to density of the packing. A power function is further adopted to describe the positive correlation between Ed and p'.
Highlights During cyclic liquefaction process, large size voids are redistributed and local void distribution around particle becomes relative uniform. A positive correlation exists between particle-void descriptor Ed and mean effective stress p', which can be further fitted by a power function. The change of particle-void fabric from consolidated state to initial liquefaction state is irrelevant to density of the packing.
Particle-void fabric and effective stress reduction in cyclic liquefaction of granular soils
Wei, Jiangtao (author)
2021-11-17
Article (Journal)
Electronic Resource
English
The Relationship Between Particle-Void Fabric and Pre-liquefaction Behaviors of Granular Soils
| British Library Conference Proceedings | 2022
Relation between void ratio and contact fabric of granular soils
| Springer Verlag | 2022
Online Contents | 1996