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Sacramento State Faculty

Richard J. Armstrong

Faculty Portrait

Contact Information

Name: Richard J. Armstrong

Title: Assistant Professor, Department of Civil Engineering

Office Location: 4046 Riverside Hall

Email: Richard.Armstrong@csus.edu

Office Phone: (916) 278-6812

Mailing Address: CSU Sacramento 6000 J Street Sacramento, CA 95819-6029

Office Hours: Mondays and Wednesdays, 9:30 - 11:00 AM

Education & Registration

  • Ph.D.   Civil and Environmental Engineering, University of California, Davis, 2010
  • M.S.    Civil and Environmental Engineering, Stanford University, 2005
  • B.S.     Civil Engineering, University of Manitoba, Canada, 2003; Honors
  • Registered Professional Civil Engineer in the State of California

Teaching & Training

  • ENGR 112: Mechanics of Materials (syllabus)
  • CE 171A: Soil Mechanics (syllabus)
  • CE 184: Geotechnical Earthquake Engineering (syllabus)
  • CE 231B: Computer Methods in Structural Analysis II (Finite Element Analysis) (syllabus)
  • CE 280C: Advanced Soil Mechanics Laboratory (Geotechnical Modeling) (syllabus)
  • CE 284: Soil Dynamics and Earthquake Engineering
  •  
  • Training: I offer hands-on trainings, either in-person or virtually, on the use of the software FLAC by Itasca. These FLAC training sessions are periodically offered to practicing engineers interested in learning or improving their modeling skills. Trainings focus on the numerical modeling of embankment dams shaken by earthquakes. Many of the skills learned through these sessions are also applicable to other geotechnical engineering problems.

Research Statement & Interests

  • My research fits within the multidisciplinary field of dam risk assessment and reduction. Within this field, my research work focuses on improving the estimates of seismic risk on embankment dams by advancing the seismic hazard and response analysis techniques and prediction of damage. Current areas of research are:
    •      - Probabilistically-consistent treatment of intensity measures in seismic hazard analyses
    •      - Identification of intensity measures that relate to embankment dam deformations
    •      - Validation of non-linear deformation response analyses against case-history and centrifuge test data
    •      - Identification of embankment dam non-linearity through utilization of strong ground motion data
  • Given the interdisciplinary nature of dam risk assessment and reduction, I also seek to collaborate with experts in complementary fields.

Journal Publications

  • Journal
  • Armstrong, R. (in review). Numerical analysis of LEAP centrifuge experiments using a practice-based approach. Soil Dynamics and Earthquake Engineering.
  • DeJong, J., Ghafghazi, M., Sturm, A., Wilson, D., den Dulk, J., Armstrong, R., Perez, A., and Davis, C. (accepted). Instrumented Becker Penetration Test I: Equipment, Operation, and Performance. J. Geotechnical and Geoenvironmental Eng.
  • 7.     Armstrong, R. (2016). Procedure for selecting and modifying earthquake motions to multiple intensity measures. Soil Dynamics and Earthquake Engineering. 89
  • 6.     Armstrong, R. and Malvick, E. (2016). Practical considerations in the use of liquefaction susceptibility criteria. Earthquake Spectra, EERI, EERI. 32(3)
  • 5.     Armstrong, R., Boulanger, R., and Beaty, M. (2014). Equivalent-static analysis of piled bridge abutments affected by earthquake-induced liquefaction. J. Geotechnical and Geoenvironmental Eng., ASCE, 140(8).
  • 4.     DeJong, J., Ghafghazi, M., Strum, A., Armstrong, R., Perez, A., and Davis, C. (2014). A new instrumented becker penetration test (iBPT) for improved characterization of gravelly deposits within and underlying dam . The Journal of Dam Safety, ASDSO, 12(2), 9-19.
  • 3.     Malvick, E., Armstrong, R., and Martin, K. (2014). Estimating the dynamic shear strength of soils for dam seismic safety analyses. The Journal of Dam Safety, ASDSO. 12(3), 9-20.
  • 2.     Armstrong, R., Boulanger, R., and Beaty, M. (2013). Liquefaction effects on piled bridge abutments: centrifuge tests and numerical analyses. J. Geotechnical and Geoenvironmental Eng., ASCE 139(3), 433-43.
  • 1.     Armstrong, R., DeJong, J., and Yafrate, N. (2010). Engaging students with diverse learning styles in large, media-intensive geotechnical engineering classes using an integrated Tablet PC - Classroom Communication System platform. The Electronic Journal of Geotechnical Engineering, 15, 1-22.
  • Conference and Magazine
  • 23.  Armstrong, R. and Boulanger, R. (2015). Numerical simulations of liquefaction effects on piled bridge abutments. Proceedings, 6th International Conference on Earthquake Geotechnical Engineering.
  • 22.  Kutter, B., Carey, T., Hahimoto, T., Manzari, M., Vasko, A., Zeghal, M., and Armstrong, R. (2015). LEAP Databases for verification, validation, and calibration of codes of liquefaction. Proceedings, 6th International Conference on Earthquake Geotechnical Engineering.
  • 21.  Armstrong, R. (2014). Comparison of BPT-SPT correlations at gravelly alluvial dam site. Proceedings, 2014 GeoCongress Geo-Characterization and Modeling for Sustainability.
  • 20.  Armstrong, R. and Malvick, E. (2014). Comparison of liquefaction susceptibility methods. Proceedings, 2014 Annual United States Society of Dams Conference.
  • 19.  Cvijanovic, V., Schultz, M., and Armstrong, R. (2014). Application of nonlinear analysis methods to hydraulic structures subject to extreme loading conditions. Proceedings, 2014 Annual United States Society of Dams Conference.
  • 18.  Ghafghazi, M., DeJong, J., Strum, A., Wilson, D., Davis, C., Perez, A., and Armstrong, R. (2014). Characterization of gravelly soils for liquefaction potential assessment at dam sites using the iBPT. Proceedings, 2014 Annual United States Society of Dams Conference.
  • 17.  Ghafghazi, M., Thurairajah, A., DeJong, J., Wilson, D., and Armstrong, R. (2014). Instrumented becker penetration test for improved characterization of gravelly deposits. Proceedings, 2014 GeoCongress Geo-Characterization and Modeling for Sustainability.
  • 16.  Kutter, B., Manzari, M., Zeghal, Y., Zhou, G., and Armstrong, R. (2014) Proposed outline for LEAP verification and validation processes. Geotechnics for Catastrophic Flooding Events. p. 99 - 108.
  • 15.  Montgomery, J., Boulanger, R., Armstrong, R., and Malvick, E. (2014). Anisotropic undrained strength parameters for non-linear deformation analyses of embankment dams. Proceedings, 2014 GeoCongress Geo-Characterization and Modeling for Sustainability.
  • 14.  Malvick, E., Armstrong, R., Martin, K., and Huynh, P. (2014). An approach to evaluate the dynamic strength of soils at dam sites. Proceedings, 2014 Annual United States Society of Dams Conference.
  • 13.  Ziotopoulou, K., Maharjan, M., Boulanger, R., Beaty, M., Armstrong, R., Takahashi, A. (2014). Constitutive modeling of liquefaction effects in sloping ground. 10th U.S. National Conference on Earthquake Engineering.
  • 12.  Armstrong, R., Malvick, E., Hansra, H. (2013). Evaluation of empirical predictive models used to predict earthquake-induced slope deformations. Proceedings, 2013 GeoCongress, Stability and Performance of Slopes and Embankments III.
  • 11.  Ghafghazi, M., Thurairajah, A., DeJong, J., Wilson, D., and Armstrong, R. (2013). Characterization of gravelly soils for liquefaction potential assessment in dam foundations. USSD Newsletter, 159, 30-33.
  • 10.  Armstrong, R., Malvick, E., and Howard, J. (2011). Consistency of ground motion parameters from non-linear embankment analyses. 4th IASPEI/IAEE International Symposium: Effects of Surface Geology on Seismic Motion.
  • 9.     Malvick, E., Armstrong, R., and Howard, J. (2011). Consistency of ground motion parameters from site response analyses with empirical predictions. 4th IASPEI/IAEE International Symposium: Effects of Surface Geology on Seismic Motion.
  • 8.     Armstrong, R., Boulanger, R., and Beaty, M. (2010). Non-linear numerical modeling of centrifuge-test results for embankments underlain by liquefied soil. USSD Newsletter, 151.
  • 7.     Armstrong, R., Boulanger, R., and Beaty, M. (2010). Non-linear numerical modeling of centrifuge-test results for embankments underlain by liquefied soil. Proceedings, 30th Annual United States Society of Dams Conference.
  • 6.     Armstrong, R., Boulanger, R., and Beaty, M. (2010). Non-linear dynamic modeling of bridge embankments underlain by liquefied soil. Joint Conference Proceedings, 7th International Conference on Urban Earthquake Engineering and 5th International Conference on Earthquake Engineering.
  • 5.     Armstrong, R., DeJong, J., and Yafrate, N. (2010). Engaging students with diverse learning styles in large geotechnical engineering classes. Proceedings, Geo-Frontiers 2010 Congress.
  • 4.     Armstrong, R., Boulanger, R., Gulerce, U., Kutter, B., and Wilson, D. (2008). Centrifuge modeling of pile pinning effects. Geotechnical Earthquake Engineering and Soil Dynamics IV.
  • 3.     Boulanger, R., Chang, D., Brandenberg, S., Armstrong, R., and Kutter, B. (2007). Seismic design of piled foundation for liquefaction effects. Earthquake Geotechnical Engineering, 4th International Conference on Earthquake Geotechnical Engineering – Invited Lectures, K. D. Pitilakis, ed., Springer, The Netherlands, 277 – 302.
  • 2.     Borja, R., Andrade, J., and Armstrong, R. (2004). Combined deterministic-stochastic analysis of local site response. 13th World Conference of Earthquake Engineering.
  • 1.     Armstrong, R. and Alfaro, M. (2003). Reduction of seismic-induced pressures on rigid retaining structures using compressible inclusion: a numerical study. 56th Canadian Geotechnical Conference.
  • Reports
  • 3.     Gulerce, U., Armstrong, R., Khosravifar, A., Boulanger, R., and Kutter, B. (2007). Pile pinning effects on a bridge abutment in laterally spreading ground during earthquakes: centrifuge data report for UGU02. UCD-CGMDR-06-03.
  • 2.     Gulerce, U., Armstrong, R., Brandenberg, S., Khosravifar, A., Boulanger, R., and Kutter, B. (2007). Pile pinning effects on a bridge abutment in laterally spreading ground during earthquakes: centrifuge data report for UGU01. UCD-CGMDR-06-02.
  • 1.     Chang, D., Gulerce, U., Armstrong, R. J., Khosravifar, A., Boulanger, R. W., and Kutter, B. L. (2007). Pile pinning effects on a bridge abutment in laterally spreading ground during earthquakes: centrifuge data report for DDC03. UCD-CGMDR-06-01.