On the spatial variability of CPT-based geotechnical parameters for regional liquefaction evaluation

Chaofeng Wang, Qiushi Chen, Mengfen Shen, C. Hsein Juang

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

In-situ index tests, such as the cone penetration test (CPT), are widely used for the site-specific evaluation of liquefaction potential and are getting increased use in the regional mapping of liquefaction hazards. In this work, the spatial variability of CPT-based geotechnical parameters on the liquefaction potential evaluation is assessed through an integrated framework combining an empirical liquefaction model and a multiscale random field model that allows the effective incorporation of soil spatial variability across scales. Within this framework, two approaches, termed the local soil property approach and the averaged index approach, are developed and assessed for the characterization of spatial variability in CPT-based geotechnical parameters. The proposed framework is applied to the probabilistic and spatial assessment of the liquefaction potential of an earthquake-prone region to demonstrate its applicability and to investigate the implications of spatial variability on regional liquefaction susceptibility evaluation.

Original languageEnglish
Pages (from-to)153-166
Number of pages14
JournalSoil Dynamics and Earthquake Engineering
Volume95
DOIs
StatePublished - 1 Apr 2017

Keywords

  • Cone penetration test
  • Liquefaction
  • Liquefaction potential index
  • Random field
  • Spatial variability

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