Effects of particle size distribution and particle shape on cyclic liquefaction response of granular materials
department or school: Applied Science, Faculty of
department or school: Civil Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Banerjee, Sounik Kumar
issued: 2023-10-31T07:00:00Z
issued: 2022
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Cyclic liquefaction of granular soils is influenced by particle-level parameters such as particle size distribution and particle shape. These parameters are difficult to isolate in real soils, whereas use of Discrete element method (DEM) can be an important step to resolve this problem. It can also be used to model these individual effects on the undrained cyclic response. Samples with increasing particle size distributions, denoted by an increase in coefficient of uniformity are prepared under isotropic compression at two different relative densities. Constant volume, cyclic simple shear simulations at a low relative density under various loading intensities show that increasing the coefficient of uniformity initially increases, then decreases, the cyclic liquefaction resistance. This observation is largely reversed when the relative density is increased, in which case the liquefaction resistance decreases initially and then increases as the coefficient of uniformity increases. Microscopic examinations of the samples at their initial state are conducted to provide insight into their liquefaction resistance. Microparameters based on inter-particle contacts and normal forces reveal reasonable correlations with the macroscopic response. Furthermore, the initial state-based state parameter is found to significantly correlate with the cyclic resistance ratio irrespective of coefficient of uniformity and relative density. Finally, the determinate structure of particle assemblies (isostaticity) at the advent of cyclic liquefaction is studied in terms of average contacts. A similar approach is used to study the effect of particle shape under constant volume cyclic loading. Samples with a variety of simplified particle shapes denoted by aspect ratio and blockiness are isotropically compressed under two relative densities. Samples with non-spherical particles have lower liquefaction resistance than those with spherical particles at low relative density. In contrast, at a med…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/81357
note: EFFECTS OF PARTICLE SIZE DISTRIBUTION AND PARTICLE SHAPE ON CYCLICLIQUEFACTION RESPONSE OF GRANULAR MATERIALSbySounik Kumar BanerjeeB.E., Indian Institute of Engineering Science and Technology Shibpur, 2013M.Tech., Indian Institute of Technology Kharagpur, 2015A THESIS SUBMITTED IN PARTIAL FULFILLMENT OFTHE REQUIREMENTS FOR THE DEGREE OFDOCTOR OF PHILOSOPHYinTHE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES(Civil Engineering)The University of British Columbia(Vancouver)April 2022© Sounik Kumar Banerjee, 2022The following individuals certify that they have read, and recommend to the Faculty of Graduateand Postdoctoral Studies for acceptance, the thesis entitled:Effects of particle size distribution and particle shape on cyclic liquefaction response of granular materialssubmitted by Sounik Kumar Banerjee in partial fulfillment of the requirements forthe degree of Doctor of Philosophyin Civil EngineeringExamining Committee:Dr. Mahdi Taiebat, Civil Engineering, The University of British ColumbiaSupervisorDr. Anthony Wachs, Mathematics and Chemical and Biological Engineering, The University ofBritish ColumbiaSupervisory Committee MemberDr. John Howie, Civil Engineering, The University of British ColumbiaSupervisory Committee MemberDr. Arcesio Lizcano, Industry Expert, SRK ConsultingSupervisory Committee MemberDr. Davide Elmo, Mining Engineering, The University of British ColumbiaUniversity ExaminerDr. Carlos Ventura, Civil Engineering, The University of British ColumbiaUniversity ExaminerDr. Jidong Zhao, Civil and Environmental Engineering, Hong Kong University of Science andTechnologyExternal ExamineriiAbstractCyclic liquefaction of granular soils is influenced by particle-level parameters such as particle sizedistribution and particle shape. These parameters are difficult to isolate in real soils, whereas useof Discrete element method (DEM) can be an important step to resolve this problem. It can alsobe used to model these individual effects on the undrained cyclic resp…
has type: Thesis/Dissertation
date issued: 2022-05
is shown at: 10.14288/1.0413026
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Taiebat, Mahdi
type: Text
identifier URI: http://hdl.handle.net/2429/81357