Conference Publications

  1. El Kortbawi, M., Ziotopoulou, K., DeJong, J. T., and Moug, D. M. (2022) Effect of bio-cementation in sands on cone tip resistance: a numerical study. CPT’22 Bologna. (in press).
  2. Chiaradonna, A., Ziotopoulou, K., Carey, T. J., DeJong, J. T. (2022). Cone penetration testing to constrain the calibration process of a sand plasticity model for nonlinear deformation analysis. CPT’22 Bologna. (in press)
  3. Chiaradonna, A., Ziotopoulou, K., Carey, T. J., DeJong, J. T., and Boulanger, R. W. (2022). Dynamic Behavior of Uniform Clean Sands: Evaluation of Constitutive Model Calibration Protocols in the Element- and the System-Level Scale. ASCE GeoCongress 2022, Charlotte, NC, March 20-23. [doi].
  4. Pretell, R., Ziotopoulou, K., and Abrahamson, N. A. (2022). Numerical investigation of Vs spatial variability effects on the seismic response estimated using 2D and 1D site response analyses. ASCE GeoCongress 2022, Charlotte, NC, March 20-23. [doi].
  5. Reardon, R. A., Humire, F. A., Ahmed, S. S., Ziotopoulou, K., Martinez, A., and DeJong, J. T. (2022). Effect of Gradation on the Strength and Stress-Dilatancy of Coarse-Grained Soils: A Comparison of Monotonic Direct Simple Shear and Triaxial Tests. ASCE GeoCongress 2022, Charlotte, NC, March 20-23. [doi].
  6. El Kortbawi, M., Ziotopoulou, K., and Boulanger, R. W. (2022). Developing a Constitutive Model for Bio-Cemented Sands: Formulation, Calibration and Element Level Validation. ASCE GeoCongress 2022, Charlotte, NC, March 20-23. [doi].
  7. Carey, T. J., DeJong, J. T., Ziotopoulou, K., Martinez, A., and Chiaradonna, A. (2022). The effects of gradation on the dynamic response of sloping ground. 20th Int. Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE), Sydney, Australia (in press).
  8. Sinha, S. K., Ziotopoulou, K., and Kutter, B. L. (2022). Downdrag on axially loaded piles in liquefiable soils. 20th International Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE). Sydney, Australia (in press).
  9. Humire, F. A., Ziotopoulou, K., and DeJong, J. T. (2022). Evaluating shear strain accumulation of sands exhibiting cyclic mobility behavior. 20th International Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE). Sydney, Australia (in press).
  10. Ziotopoulou, K., Pretell, R., and Davis, C.A. (2022). Investigation of pipeline failures at Balboa Blvd. during the 1994 Northridge Earthquake. San Fernando Earthquake Conference – 50 Years of Lifeline Engineering, ASCE-UCLA, Los Angeles, California, February 7-10. [doi][link]
  11. Pretell, R., Ziotopoulou, K., and Davis, C.A. (2022). Parametric investigation of ground failure at Balboa Blvd. during the 1994 Northridge Earthquake via nonlinear deformation analyses. San Fernando Earthquake Conference – 50 Years of Lifeline Engineering, ASCE-UCLA, Los Angeles, California, February 7-10. [doi][link]
  12. Pretell, R., Sinha, S. K., Ziotopoulou, K., Watson-Lamprey, J., and Zekkos, D. (2021). Broadening the Utilization of CSMIP Data: Double convolution methodology towards developing input motions for site response & nonlinear deformation analyses. SMIP21 (Strong Motion Instrumentation Program) Seminar on Utilization of Strong-Motion Data. October 21. [link]
  13. Carey, T. J., Chiaradonna, A., Love, N. C., DeJong, J. T., and Ziotopoulou, K. (2021). The effect of gradation on the response of saturated sands when subjected to seismic loading: a centrifuge test. Geoniagara 2021, September 26-29. [link]
  14. Bassal, P. C., Boulanger, R. W., DeJong, J. T., and Ziotopoulou, K. (2021). Calibration of post-liquefaction shear deformation for a fluvial deposit in the Chi-Chi earthquake. 17th World Conference on Earthquake Engineering, 17WCEE, Sendai, Japan, September 27 to October 2nd. [link]
  15. Morales, B., Sawamura, Y., Ziotopoulou, K., Hashash, Y. M. A., and Alkhatib, K. (2022). Centrifuge Modeling of Hydrodynamic Loads in Water Storage Tanks. San Fernando Earthquake Conference – 50 Years of Lifeline Engineering, ASCE-UCLA, Los Angeles, California, February 7-10. [link]
  16. Pretell, R., Humire, F. A., and Ziotopoulou, K. (2020). On the performance of three advanced constitutive models in capturing the element response of tailings. Tailings and Mine Waste 2020, November 15-18, Keystone, CO. [link]
  17. Huang, Z., Ziotopoulou, K., and Filz, G. M. (2020). Failure heights and failure modes of eight column-supported embankments via 3D numerical analyses. ASCE International Foundations Congress and Equipment Expo (IFCEE), Dallas, Texas. [doi] [link]
  18. Ziotopoulou, K., Bronner, C. E., and Moug, D. M. (2020). Geotechnical student perceptions of mentoring: a pilot case study in the Geotechnical Graduate Student Society at UC Davis. Geotechnical Engineering Education 2020, Int. Conf. by TC306 ISSMGE. Athens, Greece, 24-25 June. [link]
  19. Lee, M., El Kortbawi, M., Gomez, M. G., and Ziotopoulou, K. (2020). Examining the liquefaction resistance of cemented sands using Microbially-Induced Calcite Precipitation and Gypsum. ASCE GeoCongress, Minneapolis. [doi] [link]
  20. Huang, Z., Ziotopoulou, K., and Filz, G. M. (2020). Lateral thrust distribution for lateral spreading analysis of geosynthetic-reinforced column-supported embankments: a parametric study via 3D simulations. ASCE GeoCongress, Minneapolis. [doi] [link]
  21. Ziotopoulou, K., Montgomery, J., Tsiaousi, D., Tasiopoulou, P., Ugalde, J., and Travasarou, T. (2019). Effect of numerical modeling protocols on the seismic response of a liquefiable slope. 7th International Conference on Earthquake Geotechnical Engineering, Silvestri, Moraci, and Antonielli (eds), Rome, Italy. [link]
  22. Sinha, S.K., Ziotopoulou, K., and Kutter, B. L. (2019). Parametric study of liquefaction induced downdrag on axially loaded piles. 7th International Conference on Earthquake Geotechnical Engineering, Silvestri, Moraci, and Antonielli (eds), Rome, Italy. [link]
  23. El Kortbawi, M., and Ziotopoulou, K. (2019). Cyclic behavior of bio-cemented sands: state of knowledge from experimental data and constitutive models. 7th International Conference on Earthquake Geotechnical Engineering, Silvestri, Moraci, and Antonielli (eds), Rome, Italy. [link]
  24. Pretell, A.R., Ziotopoulou, K., and Abrahamson, N. (2019). Methodology for the development of input motions for nonlinear deformation analyses. 7th International Conference on Earthquake Geotechnical Engineering, Silvestri, Moraci, and Antonielli (eds), Rome, Italy. [link]
  25. Humire, F. A., Ziotopoulou, K., Basson, M. S., and Martinez, A. (2019). Framework for tracking the accumulation of shear strains during cyclic mobility. 7th International Conference on Earthquake Geotechnical Engineering, Silvestri, Moraci, and Antonielli (eds), Rome, Italy. [link]
  26. Martinez, A., O’Hara, K. B., Sinha, S. K., Wilson, D., and Ziotopoulou, K. (2018). Monotonic and cyclic centrifuge testing of snake skin-inspired piles. Proceedings. Biomediated. and Bioinspired Geotechnics (B2G) Conference, Atlanta, September. [link]
  27. El Kortbawi, M., Ziotopoulou, K., Gomez, M. G., and Lee, M. (2019). Validation of a bounding surface plasticity model against the experimental response of (bio-) cemented sands. ASCE GeoCongress, Philadelphia, PA, March. [doi] [link]
  28. Bronner, C. E., Wilson, D. W., Ziotopoulou, K., Darby, K. M., Sturm, A., Raymond, A. J., Boulanger, R. W., and DeJong, J. T. (2018) An example of effective mentoring for research centers, Theme Paper, 9th International Conference on Physical Modelling in Geotechnics, McNamara et al. (Eds), Taylor & Francis Group, London. [link]
  29. Boulanger, R. W., and Ziotopoulou, K. (2018). On NDA practices for evaluating liquefaction effects. Geotechnical Earthquake Engineering and Soil Dynamics V, June 10-13, Austin, Texas. [doi] [link]
  30. Ziotopoulou, K., Montgomery, J., Parra Bastidas, A. M., and Morales, B. (2018). Cyclic response of Ottawa F-65 Sand: laboratory and numerical investigation. Geotechnical Earthquake Engineering and Soil Dynamics V, June 10-13, Austin, Texas. [doi] [link]
  31. Boulanger, R. W., Price, A. B., and Ziotopoulou, K. (2018) Constitutive modeling of the cyclic loading response of low plasticity fine-grained Soils. 4th GeoShanghai International Conference, Keynote Paper, May 27-30, 2018, Shanghai, China. [doi] [link]
  32. Huang, Z., Ziotopoulou, K., and Filz, G. M. (2018) Numerical predictions of deformations in geosynthetic-reinforced column-supported embankments: validation of manual dissipation of excess pore pressures approach for undrained and drained analyses. International Foundations Congress and Equipment Exposition (IFCEE 2018), March 5-10, Orlando, Florida. [doi] [link]
  33. Stark, N., and Ziotopoulou, K. (2017) Undrained shear strength of offshore sediments from portable free fall penetrometers: theory, field observation and numerical simulations. Society for Underwater Technology OSIG (Offshore Site Investigation and Geotechnics) 8th International Conference, 12-14 September, Royal Geographical Society, South Kensington, London. [doi] [link]
  34. Montgomery, J., Boulanger, R. W., and Ziotopoulou, K. (2017). Effects of spatial variability on the seismic response of the Wildlife Liquefaction Array. Performance Based Design III (PBDIII) Earthquake Geotechnical Engineering, Vancouver, Canada, July 16-19. [link]
  35. Giannakogiorgos, A., Awad, A., and Ziotopoulou, K. (2017). Liquefaction susceptibility and triggering potential of the Wakatipu varved lake sediments in Queenstown, New Zealand. Performance Based Design III (PBDIII) Earthquake Geotechnical Engineering, Vancouver, Canada, July 16-19. [link]
  36. Ziotopoulou, K., O’Connell, S., Stark, N., and Ghose Hajra, M. (2017). Preliminary simulations of free-fall penetrometer behavior: towards validating against geotechnical field and laboratory observations and predicting sediment erosion and deposition in waterways in coastal Louisiana. Geotechnical Frontiers 2017 GSP 280, Orlando, FL. [doi] [link]
  37. Ekstrom, L. T., and Ziotopoulou, K. (2017). Seismic response of liquefiable sloping ground: validation of Class B predictions against the LEAP centrifuge tests, Geotechnical Frontiers 2017 GSP 281, Orlando, FL. [doi] [link]
  38. Ramirez, J., Badanagki, M., Abkenar, M. R., El Ghoraiby, M. A., Manzari, M. T., Dashti, S., Barrero, A., Taiebat, M., Ziotopoulou, K., and Liel, A. (2017). Seismic performance of a layered liquefiable site: validation of numerical simulations using centrifuge modeling, Geotechnical Frontiers 2017 GSP 281, Orlando, FL. [doi] [link]
  39. Ziotopoulou, K., and Montgomery, J. (2017). Numerical modeling of earthquake-induced liquefaction effects on shallow foundations. 16th World Conference on Earthquake Engineering (16WCEE), January 9-13, Santiago, Chile. [link]
  40. Montgomery, J., and Ziotopoulou, K. (2016). Simulating the effects of earthquake-induced liquefaction on shallow footings. 2nd Huixian International Forum on Earthquake Engineering for Young Researchers, August 19-21, Beijing, China. [link]
  41. Ghanat, S., Kaklamanos, J., Ziotopoulou, K., and Selvaraj, S. I. (2016). A multi-institutional study of pre- and post-course knowledge surveys in undergraduate geotechnical engineering course. 123rd Annual Conference and Exposition, June 26-29, New Orleans, LA. [link]
  42. Ziotopoulou, K., and Boulanger, R. W. (2015). PM4Sand: A sand plasticity model for earthquake engineering applications. 5th International Workshop for Young Doctors in Geomechanics, W(H)YDOC15, Pereira, Delage, Ghabezloo, Vandamme (eds), 2-4 December, Ecole des Ponts Paris Tech, France. [link]
  43. Green, R. A., and Ziotopoulou, K. (2015). Overview of screening criteria for liquefaction triggering susceptibility. 10th Pacific Conference on Earthquake Engineering, November 6-8, Sydney, Australia. [link]
  44. Ziotopoulou, K., and Boulanger, R. W. (2015). Validation protocols for constitutive modeling of liquefaction, 6th International Conference on Earthquake Geotechnical Engineering, November 1-4, Christchurch, New Zealand. [link]
  45. Stark N., Quinn, B., Ziotopoulou, K., and Lantuit, H. (2015). Geotechnical investigation of pore pressure behavior of muddy seafloor sediments in an arctic permafrost environment. ASME 2015 34th International Conference on Ocean, Offshore & Arctic Engineering OMAE 2015, Volume 1: Offshore Technology, May 31-June 5, St. John’s, Canada. [doi] [link]
  46. Ziotopoulou, K., Maharjan, M., Boulanger, R. W., Beaty, M. H., Armstrong, R. J., and Takahashi, A. (2014). Constitutive modeling of liquefaction effects in sloping ground. 10th U.S. National Conference on Earthquake Engineering, July 21-25, Anchorage, AK. [link]
  47. Ziotopoulou, K., and Boulanger, R. W. (2013). Numerical modeling issues in predicting post-liquefaction reconsolidation strains and settlements. 10th International Conference on Urban Geotechnical Engineering (CUEE), March 1-2, Tokyo, Japan. [link]
  48. Boulanger, R. W., Kamai, R., and Ziotopoulou, K. (2013). Simulation of liquefaction-induced void redistribution in a centrifuge test. 10th International Conference on Urban Geotechnical Engineering (CUEE), March 1-2, Tokyo, Japan. [link]
  49. Ziotopoulou, K., and Boulanger, R. W. (2012). Constitutive modeling of duration and overburden effects in liquefaction evaluations. 2nd International Conference on Performance-Based Design in Earthquake Geotechnical Engineering, ISSMGE, May 28-30, Taormina, Italy, Paper no. 03.10, 467-482. [link]
  50. Ziotopoulou, K., Boulanger, R. W., and Kramer, S. L. (2012). Site response analysis at liquefiable sites. ASCE Geo-Congress 2012: State of the Art and Practice in Geotechnical Engineering, R. D. Hryciw, A. Athanasopoulos-Zekkos, and N. Yesiller eds., Geotechnical Special Publication No.225, American Society of Civil Engineers, Geo-Institute, 1799-1808. [doi] [link]
  51. Boulanger, R. W., Kamai, R., and Ziotopoulou, K. (2011). Numerical modeling of liquefaction effects. Effects of Surface Geology on Seismic Motion, 4th International Association of Seismology and Physics of the Earth's Interior and International Association for Earthquake Engineering (IASPEI / IAEE) International Symposium, August 23-26, University of California, Santa Barbara, CA. [link]
  52. Gazetas, G., and Ziotopoulou, K. (2010). Bi-normalized response spectrum for a rational soil structure interaction analysis. Workshop on Soil Structure Interaction (SSI) Knowledge and Effect on the Seismic Assessment of Nuclear Power Plant Structures and Components, October 6-8, Ottawa, Canada. [link]
  53. Ziotopoulou, K., Gazetas, G., and Tazoh, T. (2010). Soil amplification during the 2003 Tokachi-Oki earthquake: Analysis of surface and bedrock recordings. 6th Hellenic Conference on Geotechnical and Environmental Engineering, September 29-October 1, Volos, Greece (in Greek). [link]
  54. Tasiopoulou, P., Ziotopoulou, K., and Gazetas G. (2010). Stavros Niarchos Cultural Center: Seismic analysis of tall reinforced earth wall on precarious soil. 6th Hellenic Conference on Geotechnical and Environmental Engineering, September 29- October 1, Volos, Greece (in Greek). [link]
  55. Gerolymos, N., Ziotopoulou, K., and Gazetas, G. (2010). Reinforced soil retaining walls: Numerical analysis of a centrifuge test. 6th Hellenic Conference on Geotechnical and Environmental Engineering, September 29-October 1, Volos, Greece (in Greek). [link]
  56. Ziotopoulou, K., and Gazetas, G. (2009). The irrationality of current seismic code spectra for soft soils: Proposed remedy. 3rd Greece–Japan Workshop on Seismic Design, Observation, Retrofit of Foundations, Special Theme: Seismic Protection of Cultural Heritage, Ed. G. Gazetas, Y. Goto, T. Tazoh, September 22-23, Santorini, Greece. [link]
  57. Ziotopoulou, K., Gazetas, G., and Garini, E. (2008). Towards a unique bi-normalized response spectrum for all soil categories. 3rd Hellenic Conference on Earthquake Engineering and Engineering Seismology, November 5-7, Athens, Greece (in Greek). [link]
  58. Gazetas, G., Gerolymos, N., Garini, E., Gelagoti. F., and Ziotopoulou, K. (2008). Asterios earthfill dam: Seismic analysis using rigorous and simplified methods. 3rd Hellenic Conference on Earthquake Engineering and Engineering Seismology, November 5-7, Athens, Greece (in Greek). [link]