Abstract
The at-rest earth pressure coefficient, $$\hbox {K}_{0}$$K0, is one of the most fundamental values for evaluating in-situ soil stresses and designing foundation. Research has been expanded to investigate the correlation between $$\hbox {K}_{0}$$K0 and micro-scale characteristic of granular soils, beyond the macroscopic approach empirically correlated with internal friction angle. This study presents the evolution of $$\hbox {K}_{0}$$K0 values of irregularly shaped natural sand, spherical shaped smooth and rough surfaced glass beads along with the stress history, estimated by the discrete element method. The surface roughness and non-spherical particles were emulated by inter-particle friction coefficient and the clumped particles. Results exhibit that the $$\hbox {K}_{0}$$K0 during loading stage nonlinearly decreases with increasing values of friction coefficient and the assemblies with clumped particles present the lower values of $$\hbox {K}_{0}$$K0 than spherical particle assemblies of the same friction coefficient. The varying friction coefficient seems enough to capture the evolution of $$\hbox {K}_{0}$$K0 during loading, unloading and reloading cycles, while the natural sand inevitably requires the assembly with clumped particles to capture the experimentally observed $$\hbox {K}_{0}$$K0 evolutions.
Original language | English |
---|---|
Pages (from-to) | 413-418 |
Number of pages | 6 |
Journal | Granular Matter |
Volume | 17 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2015 Aug 1 |
Bibliographical note
Funding Information:This work was supported by the Korea CCS R&D Center (KCRC) grant and National Research Foundation of Korea (NRF) funded by the Korea government (MSIP) (No. 2012-0008929 and No. 2011-0030040).
Publisher Copyright:
© 2015, Springer-Verlag Berlin Heidelberg.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Physics and Astronomy(all)