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.
Dynamic Responses of Rail-Embankment-Foundation on High-Speed Railways under Moving Loads
10th Asia Pacific Transportation Development Conference ; 2014 ; Beijing, China
2014-05-05
Conference paper
Electronic Resource
English
Dynamic responses of railway and carriage under the high-speed moving loads
Online Contents | 2000
|Dynamic aspects of rail tracks for high-speed railways
Online Contents | 2010
|Wheel–rail dynamic interaction due to rail weld irregularity in high-speed railways
SAGE Publications | 2018
|Rail Irregularity Power Spectrum of High-Speed Railways
Trans Tech Publications | 2013
|