Constitutive model for predicting stress-strain behavior of fine-grained sediments using shear-wave velocity

Wisam R. Muttashar, L. Sebastian Bryson

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The mechanical response of a sediment to an applied stress is significantly affected by variations of material properties, state conditions, and stress states. These stress state and conditions are utilized to infer input parameters for advanced soil constitutive models. Parameters such as void ratio and effective stresses have been readily inferred from shear-wave velocities under low-strain conditions. Thus, this research aimed to develop a shear-wave velocity-based constitutive model within a critical state soil mechanics framework to predict the undrained triaxial behavior of fine-grained sediments. Laboratory tests were performed for sediment samples ranging from silt-predominant to clay-predominant sediments. As result, a new two-term power function was developed that determined mean effective stress as a function of shear-wave velocity. By virtue of this new power function, the Original Cam Clay and Modified Cam Clay critical state models were adapted to estimate the stress-strain behavior and stress paths under undrained conditions, in terms of shear velocity. In addition, correlations were developed using the state and material properties to predict the input model parameters. The developed correlations allow broad application of the proposed framework to different sediment types in which clay and silt are the dominant deposits.

Original languageEnglish
Pages (from-to)896-910
Number of pages15
JournalMarine Georesources and Geotechnology
Volume38
Issue number8
DOIs
StatePublished - Sep 13 2020

Bibliographical note

Publisher Copyright:
© 2019 Informa UK Limited, trading as Taylor & Francis Group.

Keywords

  • Stress-strain behavior
  • constitutive model
  • critical stress state
  • shear-wave velocity

ASJC Scopus subject areas

  • Oceanography
  • Geotechnical Engineering and Engineering Geology
  • Ocean Engineering

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