Education

• PhD, Civil Engineering, University of Colorado Boulder, 2006
• MS, Civil Engineering, University of Colorado Boulder, 2000
• BS, Civil Engineering, University of Colorado Boulder, 1997

Professional Experience

• Associate Professor, Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, 2016–present
• Assistant Professor, Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, 2009–2016
• Postdoctoral Research Associate, University of Colorado Boulder, 2007–2008
• GRL & Associates, Engineering Assistant, Boulder, CO, 1994–1997
• Bridge Diagnostics, Inc., Engineering Assistant, Boulder, CO, 1994–1997

Selected Publications

• Lin, S., J. Ashlock, and X. Li-Li. 2023. Phase-velocity and intercept-time scanning (PIS) technique for extracting experimental dispersion characteristics of surface waves. Soil Dynamics and Earthquake Engineering, Vol. 164.
• Lin, S., T-H. Yi, J. Ashlock, S. Shams, F. Shi, and Y. Wang. 2022. Analytical computation of the dominant dispersion trend of Lamb waves in plate-like structures with an improved dynamic stiffness matrix method. Structural Control and Health Monitoring, Vol. 29, No. 11.
• Lin, S., T-H. Yi, J. Ashlock, and N. Gucunski. 2022. Forward modeling of Rayleigh surface waves for analytical characterization of dominant dispersion trends. Earthquake Engineering and Structure Dynamics, Vol. 51, No. 1, pp. 240–255.
• Cheng, Z., S. Sritharan, and J. C. Ashlock. 2021. Behavior of a Pile Group Supporting a Precast Pile Cap under Combined Vertical and Lateral Loads. Journal of Geotechnical and Geoenvironmental Engineering, Vol. 147, No. 9, 12 pp.
• Lin, S., J. Ashlock, and B. Li. 2021. Direct estimation of shear-wave velocity profiles from surface wave data for geotechnical site investigation. Géotechnique.
• Ghasemi, P., M. Aslani, J. C. Ashlock, R. C. Williams, and V. R. Schaefer. 2021. Evaluating gantry crane-way pavement performance: An inverse approach. Transportation Geotechnics, Vol. 27.
• Satvati, S., A. Nahvi, B. Cetin, J. C. Ashlock, C. T. Jahren, and H. Ceylan. 2021. Performance-based economic analysis to find the sustainable aggregate option for a granular roadway. Transportation Geotechnics, Vol. 26.
• Jiang, Z., and J. C. Ashlock. 2020. Computational simulation of three-dimensional dynamic soil-pile group interaction in layered soils using disturbed-zone model. Soil Dynamics and Earthquake Engineering, Vol. 130.
• Genc, D., J. C. Ashlock, B. Cetin, and P. Kremer. 2019. Development and Pilot Installation of A Scalable Environmental Sensor Monitoring System for Freeze-Thaw Monitoring under Granular-Surfaced Roadways. Transportation Research Record: Journal of the Transportation Research Board, Vol. 2673, No. 12, pp. 880–890.
• Li, C., J. C. Ashlock, and X. Wang. 2019. Quantifying Repeatability Reproducibility Sources of Error and Capacity of a Measurement: Demonstrated Using Laboratory Soil Plasticity Tests. Advances in Civil Engineering, Vol. 2019, 11 pp.

Professional Affiliations, Honors, and Service

• Elected to 1-year terms as Member-at-Large of ASTM D18 Executive Subcommittee, 2020, 2021, 2022
• Chair, ASTM sub-committee D18.09 on Cyclic and Dynamic Properties of Soils, 2017–2018, 2019–2020, 2021–2022
• Reviewer, ASCE Journal of Engineering Mechanics and ASTM Geotechnical Testing Journal
• Outstanding Reviewer Award for 2020, ASCE Journal of Geotechnical and Geoenvironmental Engineering (Awarded May 5, 2021)
• Excellence in Face-To-Face Instruction Award (for Fall 2020), ISU COVID-19 Exceptional Effort Awards Program (Awarded January 5, 2021)