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Cyclic Pore Pressure Generation, Dissipation and Densification in Granular Mixes

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Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Knowledge of cyclic load induced pore pressure generation, post-liquefaction dissipation and volumetric densification characteristics of sands, silty sands, and silts are important for the analysis of performance of loose saturated granular deposits in seismic areas. This article presents results from an experimental study of these characteristics for such soils containing 0 to 100% non-plastic silt. Pore pressure generation characteristics are studied using undrained cyclic triaxial tests. Pre- and post-liquefaction compressibility and coefficient of consolidation, and post-liquefaction volumetric densification characteristics are determined from consolidation data prior to cyclic tests and pore pressure dissipation tests following undrained cyclic tests. Effects of fines content on these characteristics compared to those of clean sands are examined in the context of intergranular void ratio and intergranular contact density concepts.

Original languageEnglish
Title of host publicationGeotechnical Applications for Earthquake Engineering
Subtitle of host publicationResearch Advancements
PublisherIGI Global
Pages66-84
Number of pages19
ISBN (Electronic)9781466609167
ISBN (Print)9781466609150
DOIs
StatePublished - Jan 1 2012

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