Influence of microscopic factors on lateral earth pressure using the discrete element approach

Meng-Chia Weng, C. C. Cheng

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study adopted the discrete element method (DEM) to explore the key influencing factors on the variations of lateral earth pressure, including packing type, interior friction angle, particle stiffness and particle size. The reference parameters for the DEM model were retrieved from direct shear tests of a rod assembly. Based on the reference parameters, the evolution of lateral earth pressure is further simulated, and a parametric study was conducted. The results showed that: (1) the analysis model could effectively capture the variation of lateral earth pressure under both active and passive conditions; (2) the greater interior friction angle interior decreased the active coefficient Ka and increased the passive coefficient Kp; (3) increasing particle stiffness decreased the active coefficient Ka and increased the passive coefficient Kp; (4) larger particle sizes led to a larger active coefficient Ka and a smaller passive coefficient Kp; and (5) when the particle assembly was arranged in order, its lateral pressure was much larger than that of the randomly packed assembly.

Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Engineering Computational Technology, ECT 2012
PublisherCivil-Comp Press
Volume100
ISBN (Print)9781905088553
DOIs
StatePublished - 1 Jan 2012
Event8th International Conference on Engineering Computational Technology, ECT 2012 - Dubrovnik, Croatia
Duration: 4 Sep 20127 Sep 2012

Conference

Conference8th International Conference on Engineering Computational Technology, ECT 2012
CountryCroatia
CityDubrovnik
Period4/09/127/09/12

Keywords

  • Discrete element method
  • Lateral earth pressure
  • PFC2D

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