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A statistical analysis of the dynamic response of a railway viaduct

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journal contribution
posted on 2022-05-30, 10:00 authored by Andre JesusAndre Jesus, Zuzana Dimitrovová, Manuel AG Silva

A statistical analysis of the dynamic response of a railway viaduct, modelled after an actual structure, is presented. The finite element model of the viaduct is based on the data provided by the Portuguese Railway Company REFER EPE. The train load is simplified by a set of constant moving forces and the range of velocities implemented corresponds to typical velocities of circulation. The viaduct is composed of eight modules, but, for the sake of simplicity, only the first viaduct module is included in the analysis.

In order to perform the statistical analysis, the viaduct is subjected to a two-level factorial design. It is shown that key parameters cannot be analysed individually because in some cases interaction effects can be more important than single effects.

Response functions of significant results are presented. Their usage for dynamic response estimates is exemplified. Further it is shown how they can be used for the determination of a probability that a certain value of interest is exceeded, provided the range of key parameters corresponds to the interval of uncertainties, where the true value obeys the normal distribution.

This type of straightforward application of statistical analysis highlights the interaction of adequately selected key parameters, provides useful information for design guidelines and is believed to lead to better planning and more realistic representation of the actual response of railway bridges.

Funding

Fundação para a Ciência e a Tecnologia of the Portuguese Ministry of Science and Technology, through the project grant PTDC/EME-PME/01419/2008: “SMARTRACK – SysteM dynamics Assessment of Railway TRACKs: a vehicle-infrastructure integrated approach”

Adaptive methods for reliability analysis of complex structures

Fundação para a Ciência e Tecnologia

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History

School

  • Architecture, Building and Civil Engineering

Published in

Engineering Structures

Volume

71

Pages

244 - 259

Publisher

Elsevier

Version

  • AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Engineering Structures and the definitive published version is available at https://doi.org/10.1016/j.engstruct.2014.04.012

Acceptance date

2014-04-03

Publication date

2014-05-07

Copyright date

2014

ISSN

0141-0296

Language

  • en

Depositor

Dr Andre Jesus. Deposit date: 27 May 2022

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