Practical methods to estimate the non-linear shear stiffness of clays and silts

Paul J Vardanega, Malcolm Bolton

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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The use of databases in geotechnical engineering allows engineers to make a priori estimates of soil behaviour. Based on a study of the published literature, a database of 20 clays and silts is presented that allows predictions to be made of the strain-dependent stiffness of fine-grained soils, based on simple soil parameters. The significance of rate effects is discussed and corrections are made. The use of a reference strain γref to normalize shear strain values γ in relation to modulus reduction G/G0 is discussed. Empirical formulations are presented based on a rigorous regression analysis, and design charts are constructed.

Original languageEnglish
Title of host publicationDeformation Characteristics of Geomaterials
Subtitle of host publicationProceedings of the Fifth International Symposium on Deformation Characteristics of Geomaterials, IS-Seoul 2011, 1-3 September 2011, Seoul, Korea
EditorsC-K. Chung, H-K. Kim, J.-S. Lee, Y.-H. Jung, D-S. Kim
Place of PublicationNetherlands
PublisherIOS Press
Number of pages8
ISBN (Print)9781607508212
Publication statusPublished - Sept 2011


  • stiffness
  • degradation
  • clays
  • silts
  • database
  • correlations
  • design charts


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