TY - JOUR
T1 - Prediction of slab track settlement using an innovative 3D train-track numerical tool
T2 - Full-Scale laboratory validation
AU - Matias, Samuel R.
AU - Ferreira, Patrícia A.
AU - Sainz-Aja, José A.
AU - Pombo, João
N1 - Funding Information:
The authors would like to acknowledge: Fundação para a Ciência e Tecnologia (FCT Portugal) supporting first author's PhD scholarship PD/BD/113751/2015 (through CERIS), and the support, through IDMEC, under LAETA, project UIDB/50022/2020. The authors are also very grateful to Professors Omar Laghrouche and Peter Woodward for enabling access to laboratory experimental data of GRAFT-II test facility at Heriot-Watt University, UK.
Publisher Copyright:
© 2023 The Authors
PY - 2023/12/8
Y1 - 2023/12/8
N2 - The growth of slab track construction in recent years is mainly due to its high stability performance and low deterioration rates when subjected to high-demand railway traffic. Nevertheless, when required, slab track maintenance, such as track geometry correction, can be extensively expensive, time consuming and may involve rail service interruptions. Therefore, the development of tools that are able to analyse the performance and predict the behaviour of slab tracks over time can bring significant economic benefits to the railway industry. This work presents slab track settlement studies using a novel hybrid 3D finite-element tool (HI-Track), which is coupled with mechanistic empirical design, that is able to analyse the track behaviour over millions of train passages. The paper presents a case study of long-term experimental measurements conducted in a full scale test rig using the Bögl slab track system subjected to over 3 million load cycles emulating train operation over a long period of time. The HI-Track tool is used to investigate the long-term performance of the slab track laboratory test case, where simulations are compared and checked in a validation process. The main findings substantiate the reliability of the numerical tool to accurately predict track settlement within specified soil compressive strength of 70–100 kPa and a soil stiffness ranging between 100 and 400 MPa.
AB - The growth of slab track construction in recent years is mainly due to its high stability performance and low deterioration rates when subjected to high-demand railway traffic. Nevertheless, when required, slab track maintenance, such as track geometry correction, can be extensively expensive, time consuming and may involve rail service interruptions. Therefore, the development of tools that are able to analyse the performance and predict the behaviour of slab tracks over time can bring significant economic benefits to the railway industry. This work presents slab track settlement studies using a novel hybrid 3D finite-element tool (HI-Track), which is coupled with mechanistic empirical design, that is able to analyse the track behaviour over millions of train passages. The paper presents a case study of long-term experimental measurements conducted in a full scale test rig using the Bögl slab track system subjected to over 3 million load cycles emulating train operation over a long period of time. The HI-Track tool is used to investigate the long-term performance of the slab track laboratory test case, where simulations are compared and checked in a validation process. The main findings substantiate the reliability of the numerical tool to accurately predict track settlement within specified soil compressive strength of 70–100 kPa and a soil stiffness ranging between 100 and 400 MPa.
KW - Experimental Testing
KW - Long-Term Behaviour
KW - Settlement Prediction
KW - Track Design
KW - Track Modelling
UR - http://www.scopus.com/inward/record.url?scp=85173443451&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2023.133438
DO - 10.1016/j.conbuildmat.2023.133438
M3 - Article
AN - SCOPUS:85173443451
VL - 408
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 133438
ER -