2024-11-222024-11-222024Chordà-Monsonís, J., Sánchez-Quesada, J.C., Moliner, E., Martínez-Rodrigo, M.D., Romero, A. y Galvín, P. (2024). Modal identification and soil-structure interaction analysis of a portal frame railway bridge. En Bridge Maintenance, Safety, Management, Digitalization and Sustainability - Proceedings of the 12th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2024 (1207-1214), Copenhagen: CRC Press.978-103277040-6https://hdl.handle.net/11441/164802© 2024 The Author(s)The dynamic response of portal frame bridges is influenced by soil-structure interaction. Due to the complexity of the phenomenon, predicting its dynamic behaviour is difficult and time-consuming. For this reason, this interaction is rarely considered in the numerical analyses. However, recent research is providing further evidence about the importance of considering it to avoid discrepancies between numerical and experimental results. In this contribution, a study on an existing portal frame railway bridge is carried out. First, the determination of its modal parameters is addressed. Then, a 3D finite-element numerical model of the bridge is implemented considering the track, track-bridge-soil system. Perfectly matched layers are considered at the model boundaries. The results obtained with this model are employed to implement a simplified version on which the soil is substituted by a series of spring-dashpots. After calibration, a comparison is carried out with the experimental and numerical modes of the bridge.application/pdf8 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess10.1201/9781003483755-140