Go to:
Logótipo
Comuta visibilidade da coluna esquerda
Você está em: Start > Publications > View > Railway critical speed assessment: A simple experimental-analytical approach
Publication

Publications

Railway critical speed assessment: A simple experimental-analytical approach

Title
Railway critical speed assessment: A simple experimental-analytical approach
Type
Article in International Scientific Journal
Year
2020
Authors
Pedro Alves Costa
(Author)
FEUP
View Personal Page You do not have permissions to view the institutional email. Search for Participant Publications View Authenticus page View ORCID page
Paulo Soares
(Author)
Other
View Personal Page You do not have permissions to view the institutional email. Search for Participant Publications Without AUTHENTICUS Without ORCID
David Connolly
(Author)
Other
The person does not belong to the institution. The person does not belong to the institution. The person does not belong to the institution. Without AUTHENTICUS Without ORCID
Patrícia Lopes
(Author)
Other
The person does not belong to the institution. The person does not belong to the institution. The person does not belong to the institution. Without AUTHENTICUS Without ORCID
Journal
Vol. 134 No. 106156
Pages: 1-10
ISSN: 0267-7261
Publisher: Elsevier
Indexing
Publicação em ISI Web of Knowledge ISI Web of Knowledge - 0 Citations
ScienceDirect (Elsevier)
Other information
Authenticus ID: P-00R-Z62
Abstract (EN): When constructing a new railway line, its long length means there are significant financial implications associated with determining the geodynamic ground properties. Therefore, this paper presents recommendations to optimize the efficiency and depth of such a geotechnical site investigation. Firstly, a numerical analysis is performed to investigate the effect of soil layering, soil stiffness and track bending stiffness on critical velocity. It is shown that each of these variables play an important role, however for most practical cases, only the top 8 m of soil is influential. Track dynamics are rarely affected by soil properties at depths below this, meaning this is the maximum required depth of soil investigation. Using this knowledge, a hybrid experimental-analytical methodology is presented, based on a geophysical Spectral Analysis of Surface Waves (SASW) experimental setup to compute the ground dispersion curve and an analytical model to compute the track dispersion curve. The experimental and analytical results are combined directly, to accurately compute the critical velocity. This approach is attractive because: 1) SASW tests are typically accurate to approximate to 8 m (when using a mobile exciter) thus matching the required depth needed for critical velocity computation, 2) soil property uncertainties are inherently accounted for, 3) the uncertainties associated with SASW inversion are avoided. The approach is attractive when constructing new railway lines and upgrading the speed of existing lines because it can potentially yield site investigation cost savings. In-situ field work is performed to show the practical application of the technique.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 10
Documents
We could not find any documents associated to the publication.
Related Publications

Of the same journal

Track-ground vibrations induced by railway traffic: In-situ measurements and validation of a 2.5D FEM-BEM model (2012)
Article in International Scientific Journal
Alves Costa, PA; Calcada, R; Silva Cardoso, AS
Track-ground vibrations induced by railway traffic: experimental validation of a 3D numerical model (2017)
Article in International Scientific Journal
Correia dos Santos, NC; Barbosa, J; Rui Calçada; Delgado, R
The effect of tunnel construction on future underground railway vibrations (2019)
Article in International Scientific Journal
Pedro Alves Costa; Paulo Soares; Jesus Fernandez; David Connolly
Simplified approach for ground reinforcement design to enhance critical speed (2022)
Article in International Scientific Journal
Pedro Alves Costa; Alexandre Pinto; Jesus Fernandez; Aires Colaço; Luís Godinho
Probabilistic models for 3D structural demand considering the ground motion group size and the angle of seismic incidence (2023)
Article in International Scientific Journal
Skoulidou, D; Mohamed, H; Xavier Romão

See all (29)

Recommend this page Top
Copyright 1996-2025 © Faculdade de Direito da Universidade do Porto  I Terms and Conditions  I Acessibility  I Index A-Z
Page created on: 2025-07-10 at 08:51:10 | Privacy Policy | Personal Data Protection Policy | Whistleblowing