TY - GEN
T1 - A Multi-model Approach to Analyse Railway Track-Ground Dynamics and Soil Nonlinearity
AU - Charoenwong, C.
AU - Connolly, D. P.
AU - Dong, K.
AU - Alves Costa, P.
AU - Soares, P. J.
AU - Woodward, P. K.
N1 - Funding Information:
The authors are very grateful to all the research institutions involved in the analysis of the data presented in this paper including the University of Leeds, the University of Porto and Heriot Watt University.
Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
KW - Analytical modelling
KW - High-speed railway track
KW - Numerical modelling
KW - Railway track dynamics
KW - Soil nonlinearity
UR - http://www.scopus.com/inward/record.url?scp=85113223429&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-77234-5_4
DO - 10.1007/978-3-030-77234-5_4
M3 - Conference contribution
AN - SCOPUS:85113223429
SN - 9783030772338
T3 - Lecture Notes in Civil Engineering
SP - 37
EP - 48
BT - Advances in Transportation Geotechnics IV
A2 - Tutumluer, Erol
A2 - Nazarian, Soheil
A2 - Al-Qadi, Imad
A2 - Qamhia, Issam I. A.
PB - Springer
T2 - 4th International Conference on Transportation Geotechnics 2021
Y2 - 23 May 2021 through 26 May 2021
ER -