Significance of small strain damping and dilation parameters in numerical modeling of free-field lateral spreading centrifuge tests

Camilo Phillips, Youssef M.A. Hashash, Scott M. Olson, Mark R. Muszynski

Research output: Contribution to journalArticlepeer-review

Abstract

Lateral spreads are complex dynamic phenomena that are challenging to represent numerically. In this paper numerical models are developed and calibrated using the displacement, acceleration, and pore water pressure time histories recorded in a free-field lateral spreading centrifuge test. The calibrated numerical model then is used to predict another free-field lateral spreading centrifuge test using the same soil profile but different input acceleration time history. The computed response shows good agreement with the centrifuge test measurements. This paper demonstrates that even in a large strain problem, such as lateral spreading, small strain damping plays an important role in numerical simulation results; it also shows the need to have pressure dependent dilation parameters in the employed soil constitutive model implemented in order to simultaneously reproduce measurements of pore water pressure, acceleration and lateral displacement.

Original languageEnglish (US)
Pages (from-to)161-176
Number of pages16
JournalSoil Dynamics and Earthquake Engineering
Volume42
DOIs
StatePublished - Nov 2012

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Soil Science

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