Dynamic Responses of Rail-Embankment-Foundation on High-Speed Railways under Moving Loads

Movement of high-speed trains is modeled by moving load technology. Radiation damping and elastic recovery of infinite foundations are simulated by a three-dimensional, viscoelastic, static-dynamic, unified, artificial boundary. By considering the influence of the static stress state after embankment and rail system construction on subsequent dynamic analysis, material nonlinearity and dynamic interaction between reinforced concrete roadbeds and the upper layer of formation, large-scale, three-dimensional, dynamic, parallel computation of a rail embankment foundation system on a high-speed railway was performed. Results - including vibration displacement, vibration velocity, vibration acceleration, and dynamic stresses - were obtained. On these bases, an attenuation law of vertical dynamic stress with depth was analyzed and the influence depth of dynamic load was determined. It was found that the principal stress axes in the three planes rotated continuously during the period of load moving, and the rotation in YZ plane was dominant. The rotation of the principal stress axes was compared with that of a soil element induced by the moving load applied directly to the foundation surface.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 655-662
  • Monograph Title: Challenges and Advances in Sustainable Transportation Systems

Subject/Index Terms

Filing Info

  • Accession Number: 01529012
  • Record Type: Publication
  • ISBN: 9780784413364
  • Files: TRIS, ASCE
  • Created Date: May 15 2014 3:02PM