Dynamic response of high-speed rail foundations using linear hysteretic damping and frequency domain substructuring

Judith Wang, Xiangwu Zeng, D. A. Gasparini

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

A proposed method for mitigating ground-borne vibration generated by high-speed trains is the usage of rubber-modified asphalt concrete as a ballast mat material. To gauge this material's influence in vibration control, a dynamic finite element code that models distinct damping properties in a large, nonhomogenous system was created. A linear hysteretic damping model is used to capture the dissipative mechanisms of each material; frequency domain substructuring is used for computational efficiency. Vibratory responses utilizing different ballast mat materials in a high-speed rail foundation are compared. It is shown that rubber-modified asphalt concrete results in a general reduction of motion, particularly in directions horizontally parallel and perpendicular to the train's passage. The described modeling procedure may be used for any dynamic analysis where the preservation of material damping characteristics is desired.

Original languageEnglish
Pages (from-to)258-276
Number of pages19
JournalSoil Dynamics and Earthquake Engineering
Volume28
Issue number4
DOIs
StatePublished - Apr 2008

Keywords

  • Damping
  • Finite elements
  • Frequency domain substructuring
  • Ground-borne vibration
  • High-speed trains
  • Linear hysteretic damping
  • Rubber-modified asphalt concrete
  • Vibration isolation

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