PSI - Issue 17

Available online at www.sciencedirect.com Structural I tegrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 17 (2019) 448–455

ICSI 2019 The 3rd International Conference on Structural Integrity Continuous Monitoring and Evaluation of Railway Tracks: System Description and Assessment João Morais a *, Carlos Santos a , Paulo Morais a , André Paixão b , Eduardo Fortunato b , Francisco Asseiceiro c , Paula Alvarenga c , Luís Gomes c , a Scientific Instrumentation Centre, National Laboratory for Civil Engineering (LNEC), Av. do Brasil 101, Lisboa, 1700-066 Portugal b Transportation Department, National Laboratory for Civil Engineering (LNEC), Av. do Brasil 101, Lisboa, 1700-066 Portugal c Mota-Engil, Engenharia e Construção. S.A., Rua Rego Lameiro 38, Porto, 4300-454 Portugal ICSI 2019 The 3rd International Conference on Structural Integrity Continuous Monitoring and Evaluation of Railway Tracks: System Description and Assessment João Morais a *, Carlos Santos a , Paulo Morais a , André Paixão b , Eduardo Fortunato b , Francisco Asseiceiro c , Paula Alvarenga c , Luís Gomes c , a Scientific Instrumentation Centre, National Laboratory for Civil E gineering (LNEC), Av. do Brasil 01, Lisboa, 1700-066 Portugal b Transportation Dep rtment, Natio al L boratory for Civil Engineering (LNEC), Av. d Brasil 101, Lisboa, 1700-066 Portugal c Mota-Engil, Engenharia e Construção. S.A., Rua Rego Lameiro 38, Porto, 4300-454 Portugal A R&D Project was completed in Portugal that aimed at designing, developing and demonstrating the applicability of an innovative and integrated approach to assess the performance and condition of railway tracks. This approach is also expected to contribute to identify the specific causes of some track performance degradation, namely those that are related to the characteristics of the layers and the geomaterials that compose the substructure of the track. A system prototype was developed and installed on board of a self-propelled railway maintenance vehicle. The system is designed to continuously evaluate the vertical stiffness of the track and to detect disturbances on the dynamic contact interface between the wheelsets and the rails, some of which can be related to defects on the tracks. The system is also able to post-process the acquired data. This paper includes an overall system description of the prototype implemented based on the discussed approach and the first experimental tests performed with said prototype, regarding the system assessment. These tests were performed on a railway track, adjacent to a maintenance yard. The track was instrumented with additional on-site equipment to serve as reference for the prototype’s assessment. The data obtained from the preliminary tests suggest that the proposed approach is adequate in this context. A R&D Project was completed in Portugal that aimed at designi g, developing and demonstrating the applicability of an in ovative and integrated approach to s ss the performance and condition of railway tracks. This approach is also expected to ontribute to identify the specific causes of some track performance degradation, namely those that are related to the characteristics of the layers and the geomaterials that compose the substructure of the track. A system prototype was developed and installed on board of a self-pr pell d railway mainte ance vehicle. The system is design d to continuously evaluate the vertical stiffness of the track an to detect disturbances on the dynamic contact interface between th wheelsets and the rails, some of which can be relat d to defects on the tracks. T system is also able to post-process the acq ired data. This paper includes an overall system description of the prototype implemented based on th discussed approach a d the first experimental tests performed with said prototype, regarding the system assessment. These tests were performed on a railway track, adjacent to a maintenance yard. Th track was instru e ted with additional on-site equipment to serve as reference for the prototype’s assessment. The data obtained from the preliminary tests suggest that the proposed approach is adequate in this context. Abstract Abstract

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers.

Keywords: railway track performance; train-track interaction; track stiffness; instrumentation Keywords: railway track performance; train-track interaction; track stiffness; instrumentation

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. * Correspon ing auth r. Tel.: +351 218443683; fax: +351 218443200. E-mail address: jmorais@lnec.pt * Corresponding author. Tel.: +351 218443683; fax: +351 218443200. E-mail address: jmorais@lnec.pt

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 10.1016/j.prostr.2019.08.059