Evaluation of a simplified soil constitutive model considering the implied strength and porewater pressure generation for 1-D seismic site response

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Porewater pressure (PWP) generation leads to soil softening and potential liquefaction of sandy soils during earthquakes, and can decrease ground motion amplitudes at high frequencies and increase the predominant period of shaking. This paper presents an evaluation of the generalized Quadratic/Hyperbolic constitutive model (Groholski et al. 2016) coupled with two PWP generation models, termed GQ/H+u, as implemented in DEEPSOIL V 6.1 (Hashash et al. 2016). The GQ/H+u model can represent large-strain shear strength and thus provides more realistic response at liquefiable sites where large strains are expected. First, sets of cyclic direct simple shear tests were used to evaluate the models. Comparisons of measured and computed stress-strain loops and excess PWP generation illustrate that the model reasonably captures measured cyclic stress-strain and PWP responses. The GQ/H+u model also can reasonably capture acceleration time histories and response spectra measured in centrifuge tests in loose and dense sands subjected to strong shaking.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
EditorsThomas L. Brandon, Richard J. Valentine
PublisherAmerican Society of Civil Engineers
Pages352-360
Number of pages9
EditionGSP 281
ISBN (Electronic)9780784480434
DOIs
StatePublished - 2017
EventGeotechnical Frontiers 2017 - Orlando, United States
Duration: Mar 12 2017Mar 15 2017

Publication series

NameGeotechnical Special Publication
NumberGSP 281
Volume0
ISSN (Print)0895-0563

Other

OtherGeotechnical Frontiers 2017
CountryUnited States
CityOrlando
Period3/12/173/15/17

ASJC Scopus subject areas

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

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