Capturing cyclic mobility and preloading effects in sand using a memory-surface hardening model

H. Y. Liu, J. A. Abell, A. Diambra, F. Pisano

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Earthquake-induced build-up of pore water pressure may be responsible for reduced soil capacity, while the accumulation of shear strains may lead to a violation of serviceability limits. Predicting accurately the soil cyclic behaviour in relation to seismic numerical simulations is still a challenging topic in many respects. Efforts are required to improve several technical aspects, including the development of a reliable and complete constitutive model. This paper reports recent developments after the work of Liu et al. (2018a), and particularly about the performance of a new SANISAND formulation incorporating the memory surface concept (Corti et al., 2016). The performance of the model in terms of strain accumulation and pore pressure build-up is validated against high-quality laboratory test results. A modified dilatancy relationship is given to reproduce within the proposed framework proper cyclic mobility response. The effects of preliminary drained cyclic preloading on soil liquefaction resistance are also studied.

Original languageEnglish
Title of host publicationEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
EditorsFrancesco Silvestri, Nicola Moraci
PublisherCRC Press/Balkema
Pages3633-3640
Number of pages8
ISBN (Print)9780367143282
StatePublished - 2019
Event7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019 - Rome, Italy
Duration: 17 Jan 201920 Jan 2019

Publication series

NameEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019

Conference

Conference7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019
Country/TerritoryItaly
CityRome
Period17/01/1920/01/19

Bibliographical note

Publisher Copyright:
© 2019 Associazione Geotecnica Italiana, Rome, Italy.

Keywords

  • Earthquakes
  • Pore pressure
  • Soil liquefaction
  • Soils
  • Strain
  • Surface hardening
  • Cyclic behaviour
  • Cyclic preloading
  • Liquefaction resistance
  • Pore-water pressures
  • Preloading effects
  • Pressure build up
  • Strain accumulations
  • Technical aspects
  • Geotechnical engineering

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