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) 419–426

ICSI 2019 The 3rd International Conference on Structural Integrity Continuous Monitoring and Evaluation of Railway Tracks: Proof of Concept Paulo Morais a *, João Morais a , Carlos Santos 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, Av. do Brasil 101, Lisboa, 1700-066 Portugal b Transportation Department, National Laboratory for Civil Engineering, 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: Proof of Concept Paulo Morais a *, João Morais a , Carlos Santos 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, Av. do Brasil 01, Lisboa, 1700-066 Portugal b Transportation Department, Nation l Laboratory for Civil Engineering, Av. do 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 recently 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. 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 wheel and rail dynamic contact interactions. The system is also able to post-process the acquired data taking into account structural aspects of the track. Following the work described in another paper submitted to ICSI 2019, this paper presents the methodology used in this project to process the acquired data and determine the relevant structural railway track parameters, such as railway track vertical stiffness, some geometrical properties of the rails and characteristic resonance frequencies of the vehicle-rail dynamic interaction. It also presents the results obtained from the first test using the prototype on a railway track under regular operation. For this purpose, a section of the track was instrumented with additional on-site equipment to provide data for further system assessment and validation. The instrumented section comprised part of a bridge over Ribeira de São Martinho and the adjacent transition zone, near Alcácer do Sal, in Portugal. The data obtained from this proof of concept test, together with the results gathered from previous phases of this project, suggest that the proposed approach is adequate in this context. A R&D Project was recently c mpleted in Portugal that aim d at designing, developing and demonstrating the applicability f an innovative and integrated approach to assess the performance and condition of railway tracks. A system prototype was developed and installed on board of a self-prop lled railway maintenance v hicle. The s ste is designed to ontinuously evaluate the vertical stiffness of t track and to detect disturbances on the wheel and rail dyn mic contact interactions. The system is also able to post-process the acquired data taking into account structural aspects of the track. Following the work described in another paper submitted to ICSI 2019, this paper presents the methodology used in this project to process th acquired data and determine the relevant structural railway track parameters, such as railway track vertical stiffness, some geom trical properties of the rails and characteristic resonance frequencies of the vehicle-rail dynamic i teraction. It also presents the results obtained from the first test using the prototype on a railway track under regular operation. For this purpose, a section of the track was instrumented with additional on-site equipment to provide data f r further system assessment and validation. The instrumented section comprised part of a bridge over Ribeira de São Martinho and th adjacent transition zone, near Alcácer do Sal, in Portu al. The data obtained from this proof of co cept test, together with the results gathered from previous phases of this project, 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 . Tel.: +351 218443683; fax: +351 218443200. E-mail address: pmorais@lnec.pt * Corresponding author. Tel.: +351 218443683; fax: +351 218443200. E-mail address: pmorais@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.2019.08.055