A Multi-model Approach to Analyse Railway Track-Ground Dynamics and Soil Nonlinearity

C. Charoenwong, D. P. Connolly, K. Dong, P. Alves Costa, P. J. Soares, P. K. Woodward

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

Abstract

An increase in train speed generates amplified track deflection. With higher speed, larger strains are induced within the track and subgrade structures. This results in nonlinear behaviour of material properties, particularly the soil stiffness. In railway engineering, it is challenging to deal with these high levels of amplification because the deep wave propagation within the track and underlying soil structures is complicated. Therefore, this paper investigates the influential variables that cause a significant impact on the dynamic amplification of the railway. Four modelling strategies used to generate findings into the problems of railway track dynamics and track-soil nonlinearity. The four types of model are analytical, combined analytical–numerical, 2.5D finite element and 3D finite element. These four models are used to analyse the cases of homogenous half-space soils, homogenous soils above bedrock, layered soils, low-stiffness soil layers and track-soil nonlinearity. The analysis results provide a better understanding of wave propagation characteristics within the subgrade structures. This can be useful for consideration of the design or improvement of railway track structures and earthworks.

Original languageEnglish
Title of host publicationAdvances in Transportation Geotechnics IV
EditorsErol Tutumluer, Soheil Nazarian, Imad Al-Qadi, Issam I. A. Qamhia
PublisherSpringer
Pages37-48
Number of pages12
ISBN (Electronic)9783030772345
ISBN (Print)9783030772338
DOIs
Publication statusPublished - 2022
Event4th International Conference on Transportation Geotechnics 2021 - Chicago, United States
Duration: 23 May 202126 May 2021

Publication series

NameLecture Notes in Civil Engineering
Volume165
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference4th International Conference on Transportation Geotechnics 2021
Abbreviated titleICTG 2021
Country/TerritoryUnited States
CityChicago
Period23/05/2126/05/21

Keywords

  • Analytical modelling
  • High-speed railway track
  • Numerical modelling
  • Railway track dynamics
  • Soil nonlinearity

ASJC Scopus subject areas

  • Civil and Structural Engineering

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