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Constitutive Modeling of the Cyclic Loading Response of Low Plasticity Fine-Grained Soils

  • Ross W. Boulanger
  • Adam B. Price
  • Katerina Ziotopoulou
Conference paper

Abstract

Calibrations of the PM4Silt constitutive model are presented for two low-plasticity fine-grained soils that exhibit significantly different cyclic loading behaviors. The PM4Silt model is a stress-ratio controlled, critical state compatible, bounding surface plasticity model that was recently developed for representing low-plasticity silts and clays in geotechnical earthquake engineering applications. The low-plasticity clayey silt and silty clay examined herein were reconstituted mixtures of silica silt and kaolin with plasticity indices (PIs) of 6 and 20. Undrained monotonic and undrained cyclic direct simple shear (DSS) tests were performed on normally consolidated, slurry deposited specimens. Calibration of the PM4Silt model was based on the monotonic and cyclic DSS test data, plus empirical relationships for strain-dependent secant shear moduli and equivalent damping ratios. The calibration process and performance of the PM4Silt constitutive model are described for each soil. The results illustrate that PM4Silt is capable of reasonably approximating a range of monotonic and cyclic loading behaviors important to many earthquake engineering applications and is relatively easy to calibrate.

Keywords

Liquefaction Cyclic softening Silt Constitutive model Cyclic 

Notes

Acknowledgments

The work presented herein was derived from studies supported by the National Science Foundation (grants CMMI-1300518 and CMMI-1635398) and the California Department of Water Resources (DWR) under Contract 4600009751. Any opinions, findings, or recommendations expressed in this material are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of either organization.

References

  1. Boulanger, R.W., Beaty, M.H.: Seismic deformation analyses of embankment dams: a reviewer’s checklist. In: Proceedings, Celebrating the Value of Dams and Levees – Yesterday, Today and Tomorrow, 36th USSD Annual Meeting and Conference, United States Society on Dams, Denver, CO, pp. 535–546 (2016)Google Scholar
  2. Boulanger, R.W., Ziotopoulou, K.: PM4Sand (Version 3): a sand plasticity model for earthquake engineering applications, 112 pp. Report No. UCD/CGM-15/01, Center for Geotechnical Modeling, Department of Civil and Environmental Engineering, University of California, Davis, CA (2015)Google Scholar
  3. Boulanger, R.W., Ziotopoulou, K.: PM4Silt (Version 1): a silt plasticity model for earthquake engineering applications. Report No. UCD/CGM-18/01, Center for Geotechnical Modeling, Department of Civil and Environmental Engineering, University of California, Davis, CA (2018)Google Scholar
  4. Boulanger, R.W., Ziotopoulou, K.: On NDA practices for evaluating liquefaction effects. In: Proceedings of Geotechnical Earthquake Engineering and Soil Dynamics V, ASCE Geo-Institute, Austin, TX, 10–13 June (2018, in press)Google Scholar
  5. Carlton, B.D., Pestana, J.M.: Small strain shear modulus of high and low plasticity clays and silts. In: 15th World Conference on Earthquake Engineering, Lisbon, Portugal (2012)Google Scholar
  6. Itasca: FLAC, Fast Lagrangian Analysis of Continua, User’s Guide, Version 8.0. Itasca Consulting Group, Inc., Minneapolis, MN (2016)Google Scholar
  7. Price, A.B., Boulanger, R.W., DeJong, J.T., Parra Bastidas, A.M., Moug, D.: Cyclic strengths and simulated CPT penetration resistances in intermediate soils. In: 6th International Conference on Earthquake Geotechnical Engineering, 14 November, Christchurch, New Zealand (2015)Google Scholar
  8. Price, A.B., DeJong, J.T., Boulanger, R.W.: Cyclic loading response of silt with multiple loading events. J. Geotech. Geoenviron. Eng. 143(10), 04017080 (2017).  https://doi.org/10.1061/(asce)gt.1943-5606.0001759CrossRefGoogle Scholar
  9. Ziotopoulou, K., Boulanger, R.W.: Plasticity modeling of liquefaction effects under sloping ground and irregular cyclic loading conditions. Soil Dyn. Earthq. Eng. 84, 269–283 (2016).  https://doi.org/10.1016/j.soildyn.2016.02.013CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Ross W. Boulanger
    • 1
  • Adam B. Price
    • 1
  • Katerina Ziotopoulou
    • 1
  1. 1.University of CaliforniaDavisUSA

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