Print Email Facebook Twitter Vertical dynamic measurements of a railway transition zone Title Vertical dynamic measurements of a railway transition zone: a case study in Sweden Author Unsiwilai, S. (TU Delft Railway Engineering) Shen, C. (TU Delft Railway Engineering) Zeng, Y. (TU Delft Railway Engineering) Wang, L. (TU Delft Railway Engineering) Nunez, Alfredo (TU Delft Railway Engineering) Li, Z. (TU Delft Railway Engineering) Date 2024 Abstract This study presents a measuring framework for railway transition zones using a case study on the Swedish line between Boden and Murjek. The final goal is to better understand the vertical dynamics of transition zones using hammer tests, falling weight measurements, and axle box acceleration (ABA) measurements. Frequency response functions (FRFs) from hammer tests indicate two track resonances, for which the FRF magnitudes on the plain track are at least 30% lower than those at the abutment. The falling weight measurements indicate that the track on the bridge has a much higher deflection than the track on the embankment. Two features from ABA signals, the dominant spatial frequency and the scale average wavelet power, show variation along the transition zone. These variations indicate differences in track conditions per location. Finally, the ABA features in the range of 1.05–2.86 m−1 are found to be related to the track resonance in the range of 30–60 Hz. The findings in this paper provide additional support for physically interpreting train-borne measurements for monitoring transition zones. Subject Axle box accelerationImpact excitationRailway bridgeRailway track vertical dynamicRailway transition zone To reference this document use: http://resolver.tudelft.nl/uuid:4ae56e89-0595-4e70-bac0-6bc8f070d169 DOI https://doi.org/10.1007/s13349-024-00766-0 ISSN 2190-5452 Source Journal of Civil Structural Health Monitoring, 14 (4), 979-996 Part of collection Institutional Repository Document type journal article Rights © 2024 S. Unsiwilai, C. Shen, Y. Zeng, L. Wang, Alfredo Nunez, Z. Li Files PDF s13349-024-00766-0.pdf 8.06 MB Close viewer /islandora/object/uuid:4ae56e89-0595-4e70-bac0-6bc8f070d169/datastream/OBJ/view