Ramin Motamed

Associate Professor
Ramin Motamed

Prospective graduate students

I am constantly looking for qualified and motivated graduate students. Preferred qualifications will depend on the nature of research projects and specific information will be posted here as new positions become available.

Research interests

  • Shake table tests on deep and shallow foundations
  • Liquefaction and laterally spreading grounds, mitigation measures
  • Site response analysis and soil-structure-interaction
  • LRFD for deep foundations
  • Analysis and interpretation of ground motions for soil-structure system response evaluation

Current research projects

  1. Evaluation of Soil-Structure Interaction in the Seismic Design of Buildings
  2. Local Site Effects and Reducing Uncertainties in Ground Motion Prediction Equations by Incorporating Site Period
  3. Lateral Analysis and LRFD of Large-Diameter Drilled Shafts
  4. Validation of Advanced Modeling Techniques Using Instrumented Building and Downhole Array Data
  5. Shake Table Tests on Shallow Foundations in Liquefiable Soils
  6. Development of Site-Specific Vertical Ground Motions
  7. Helical Piles for Underpinning of Shallow Foundations on Soils Susceptible to Liquefaction
  8. Evaluation of Nonlinear Soil Response Using Geotechnical Downhole Arrays
  9. Exploration of Scaling Effects Based on Small and Large Diameter Drilled Shaft Load Test Data
  10. Calibration of Resistance Factors for LRFD of Axially Loaded Drilled Shafts in Las Vegas Valley

Selected publications

  1. Saxena, S., Motamed, R., and Ryan, K. (2022) “Contrasting Subsurface Models for Physics-Based Regional-Scale Numerical Simulations in Japan Using a Rigorous Validation Scheme” Journal of Japan Association for Earthquake Engineering (accepted).
  2. Bhuiyan, F.M., Motamed, R., Siddharthan, R.V., and Sanders, D. (2022) “Evaluation of a unified p-y method for lateral analysis of large-diameter drilled shafts using NVShaft” Transportation Geotechnics, Volume 36, September 2022, 100813. 
  3. Boushehri, R., Motamed, R., Ellison, K., and Stanton, K. (2022) “Estimating Epistemic Uncertainty in Soil Parameters for Nonlinear Site Response Analyses: Introducing the Latin Hypercube Sampling Technique” Earthquake Spectra. 
  4. Toth, J.A.W., Motamed, R., and Panorska, A. (2022) “A New Method for Extrapolating the Load-Displacement Response of Drilled Shaft Foundations for Interpretation of Side Capacity” Soils and Foundations, Volume 62, Issue 3, June 2022, 101154. https://doi.org/10.1016/j.sandf.2022.101154
  5. Yazdi, M., Motamed, R., and Anderson, J.G. (2022) “A New Set of Automated Methodologies for Estimating Site Fundamental Frequency and Its Uncertainty Using Horizontal-to-Vertical Spectral Ratio Curves” Seismological Research Letters, (2022) 93 (3): 1721–1736. 
  6. Jahed Orang, M., Boushehri, R., Motamed, R., Parayancode, A., and Elgamal, A. (2021) “An Experimental Evaluation of Helical Piles as a Liquefaction-Induced Building Settlement Mitigation Measure” Soil Dynamics and Earthquake Engineering, Volume 151, December 2021, 106994. 
  7. Zogh, P., Motamed, R., and Ryan, K. (2021) “Empirical Evaluation of Kinematic Soil-structure Interaction Effects in Structures with Large Footprints and Embedment Depths” Soil Dynamics and Earthquake Engineering, Volume 149, October 2021, 106893. 
  8. Mojtahedzadeh, N., Ghalandarzadeh, A., and Motamed, R. (2021) “Experimental Evaluation of Dynamic Characteristics of Firoozkuh Sand using Cyclic Triaxial Tests” International Journal of Civil Engineering, Springer, June 2021, pp. 125-138. 
  9. Jahed Orang, M., Motamed, R., Parayancode, A., and Elgamal, A. (2021) “Large-Scale Shake Table Tests on a Shallow Foundation in Liquefiable Soils” Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 147, Issue 1 (January 2021).
  10. Bahadori, H., Hasheminezhad, A., Motamed, R., and Motamedi, H. (2020) “Shaking table tests on shallow foundations over geocomposite and geogrid-reinforced liquefiable soils” Soil Dynamics and Earthquake Engineering, Vol. 128, January 2020, 105986.
  11. O'Riordan, N., Almufti, I., Lee, J., Ellison, K., and Motamed, R. (2018) " Site response analysis for dynamic soil-structure interaction and performance-based design" ICE Proceedings Geotechnical Engineering (in press)
  12. Li, G., Motamed, R., and Dickenson, S. (2018) " Evaluation of One-Dimensional Multi-Directional Site Response Analyses Using Geotechnical Downhole Array Data" Earthquake Spectra. February 2018, Vol. 34, No. 1, pp. 349-376.
  13. Stanton, K., Motamed, R., and Elfass, S. (2017) "Robust LRFD resistance factor calibration for axially loaded drilled shafts in Las Vegas" Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 143, Issue 6, June 2017.
  14. Li, G., and Motamed, R. (2017) " Finite element modeling of soil-pile response subjected to liquefaction-induced lateral spreading in a large-scale shake table experiment" Soil Dynamics and Earthquake Engineering, 92 (2017) 573-584.
  15. Motamed, R., Stanton, K., Almufti, I., Ellison, K., and Willford, M. (2016) " Improved Approach for Modeling Nonlinear Site Response of Highly Strained Soils: Case Study of the Service Hall Array in Japan" Earthquake Spectra, May 2016, Vol. 32, No. 2, pp. 1055-1074.
  16. Almufti, I., Motamed, R., Grant, D.N., and Willford, M. (2015) " Incorporation of velocity pulses in design ground motions for response history analysis using a probabilistic framework" Earthquake Spectra, Earthquake Engineering Research Institute, August 2015, Vol. 31, No. 3, pp. 1647-1666.
  17. Motamed, R., Towhata, I., Honda, T., Tabata, K., and Abe, A. (2013) " Pile group response to liquefaction-induced lateral spreading: E-Defense large shake table test" Soil Dynamics and Earthquake Engineering, Vol. 51, August 2013, pages 35-46.
  18. Motamed, R., and Towhata, I. (2010) " Shaking table tests on pile groups behind quay wall model undergoing lateral spreading" Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 136, No. 3, pp. 477-489.
  19. Motamed, R., and Towhata, I. (2010) " Mitigation measures for pile groups behind quay wall models undergoing lateral flow of liquefied soil: shaking table results" Soil Dynamics and Earthquake Engineering, Vol. 30, Issue 10, October 2010, Pages 1043-1060.
  20. Motamed, R., Sesov, V., Towhata, I., and Anh, N.T. (2010) " Experimental modelling of large pile groups in sloping ground subjected to liquefaction-induced lateral flow: 1-G shaking table tests" Soils and Foundations, Vol.50, No.2, pp. 261-280.

Courses taught

  • CEE 442/642 Fundamentals of Geotechnical Engineering
  • CEE 443/643 Foundation Engineering Design
  • CEE 479/679 Earthquake Engineering
  • CEE 745 Geotechnical Earthquake Engineering
  • CEE 746 Advanced Foundation Engineering
  • CEE 748 Advanced Geotechnical Laboratory

Group members


  1. Dr. Zahra Faeli, 12/2021-present

Ph.D. students

  1. Reza Mohammadi, 08/2022-present 
  2. Md Kausar Alam Anik, 08/2021-present
  3. Mohammad Yazdi, 08/2019-present
  4. Peiman Zogh, 08/2019-present
  5. Reza Boushehri, 01/2019-present 
  6. Fahim Mashroor Bhuiyan, graduated
  7. Swasti Saxena, graduated
  8. Milad Jahed Orang, graduated
  9. Joseph Toth, graduated 
  10. Gangjin Li, (graduated) 
  11. Kevin Stanton, (graduated) 

M.S. students (with thesis)

  1. Atsou Komla Herve Agbemenou, 08/2021- present
  2. Fahim Mashroor Bhuiyan, (graduated)
  3. Swasti Saxena, (graduated)
  4. Austin Metz, (graduated)
  5. Joseph Toth, (graduated) 
  6. Maryam Ostovar, (graduated)
  7. Seyed Farshid Ghazavi, (graduated)