Seismic surface wave testing for track substructure assessment

Timothy D Stark, Thomas J. Dehlin, Soheil Nazarian, Hoda Azari, Deren Yuan, Carlton L. Ho

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents some results of a Federal Railroad Administration (FRA) sponsored research project on using seismic surface waves to evaluate track substructure (ballast and subgrade) condition and performance. The main objective of this project is to develop a system for rapidly, nondestructively, and quantitatively assessing the engineering properties of the track substructure (ballast and subgrade). These engineering properties - shear modulus, Young's modulus, and shear strength - are derived from measurement of the shear wave velocity profile and can be used to evaluate track safety and to predict inspection and maintenance intervals. This paper describes the seismic testing, results of field measurements, and numerical modeling of the seismic wave propagation in the track substructure. Procedural issues addressed by the numerical models and presented herein include the size and location of the excitation source and orientation and spacing of the receiving accelerometers.

Original languageEnglish (US)
Title of host publication2014 Joint Rail Conference, JRC 2014
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9780791845356
DOIs
StatePublished - 2014
Event2014 Joint Rail Conference, JRC 2014 - Colorado Springs, CO, United States
Duration: Apr 2 2014Apr 4 2014

Other

Other2014 Joint Rail Conference, JRC 2014
CountryUnited States
CityColorado Springs, CO
Period4/2/144/4/14

ASJC Scopus subject areas

  • Transportation

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    Stark, T. D., Dehlin, T. J., Nazarian, S., Azari, H., Yuan, D., & Ho, C. L. (2014). Seismic surface wave testing for track substructure assessment. In 2014 Joint Rail Conference, JRC 2014 American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/JRC2014-3776