Comparing Shear Response of Dense Sands from Centrifuge and Direct Simple Shear Tests with Published Correlations

Lopamudra Bhaumik, Alfonso A. Cerna-Diaz, Ozgun A. Numanoglu, Scott M. Olson, Cassandra J. Rutherford, Youssef M.A. Hashash, Thomas Weaver

Research output: Contribution to journalConference article

Abstract

The mode of shear in the field induced by a seismic wave is commonly assumed to be best captured by the cyclic direct simple shear (DSS) test. To investigate this assumption, this work uses an inverse analysis technique to estimate shear stress (τ)-shear strain (γ) from dynamic centrifuge tests on very dense Ottawa 40/70 sand (relative density, Dr ∼ 95%). This back-calculated stress-strain response is compared to τ-γ response: (1) measured in drained and undrained monotonic and cyclic DSS tests on dry and saturated medium dense to very dense (Dr ∼ 51 to 95%) sands; and (2) inferred from existing shear modulus reduction correlations available in the literature. The results indicate that the DSS response is softer to shear strains up to about 0.4%, while existing correlations based on resonant column-torsional shear tests capture the back-calculated τ-γ response from the centrifuge tests.

Original languageEnglish (US)
Pages (from-to)122-131
Number of pages10
JournalGeotechnical Special Publication
Volume2018-June
Issue numberGSP 293
DOIs
StatePublished - Jan 1 2018
Event5th Geotechnical Earthquake Engineering and Soil Dynamics Conference: Slope Stability and Landslides, Laboratory Testing, and In Situ Testing, GEESDV 2018 - Austin, United States
Duration: Jun 10 2018Jun 13 2018

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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