Computational Technology Resources - CCC

J. Chordà Monsonís¹, J.C. Sánchez-Quesada¹, E. Moliner¹, A. Romero², P. Galvín² and M.D. Martínez-Rodrigo¹

¹Department of Mechanical Engineering and Construction, Universitat Jaume I, Castelló de la Plana, Spain
²Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Spain

doi:10.4203/ccc.7.15.2

J. Chordà Monsonís, J.C. Sánchez-Quesada, E. Moliner, A. Romero, P. Galvín, M.D. Martínez-Rodrigo, "On the Dynamic Response of Soil-Structure Coupled Railway Infrastructures: The Case of a Portal Frame Bridge", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 15.2, 2024, doi:10.4203/ccc.7.15.2

Keywords: vibrations, acceleration, underpass, partially-buried structure, experimental measurements, high-speed railway bridge.

Abstract

Predicting the dynamic response of portal frame bridges is challenging because of the strong influence of the soil-structure interaction. This aspect adds complexity to the vibratory phenomenon, and, as a result, accurate numerical analyses are difficult to conduct and time-consuming. For this reason, the soil-structure interaction mechanism is seldom considered in the numerical models. However, as evidence shows, this constitutes an important source of discrepancy between numerical and experimental results. In this investigation, a study on an existing portal frame railway bridge is carried out. First, the identification of its modal parameters from experimental data is addressed. Then, a 3D finite element numerical model considering the track-bridge-soil system is implemented. Perfectly matched layers are considered at the model boundaries. The soil-structure interaction is evaluated and the results are used to implement a simplified model, on which the soil is substituted by a series of spring-dampers. After calibration, an experimental-numerical comparison is performed on the bridge modal parameters to validate the followed approach. Finally, the simplified model is used to predict the dynamic response of the portal frame measured under operating conditions.

download the full-text of this paper (PDF, 13321 Kb)

go to the previous paper
go to the next paper
return to the table of contents
return to the volume description

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 7 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 15.2 On the Dynamic Response of Soil-Structure Coupled Railway Infrastructures: The Case of a Portal Frame Bridge J. Chordà Monsonís¹, J.C. Sánchez-Quesada¹, E. Moliner¹, A. Romero², P. Galvín² and M.D. Martínez-Rodrigo¹ ¹Department of Mechanical Engineering and Construction, Universitat Jaume I, Castelló de la Plana, Spain ²Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Spain doi:10.4203/ccc.7.15.2 Full Bibliographic Reference for this paper J. Chordà Monsonís, J.C. Sánchez-Quesada, E. Moliner, A. Romero, P. Galvín, M.D. Martínez-Rodrigo, "On the Dynamic Response of Soil-Structure Coupled Railway Infrastructures: The Case of a Portal Frame Bridge", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 15.2, 2024, doi:10.4203/ccc.7.15.2 Keywords: vibrations, acceleration, underpass, partially-buried structure, experimental measurements, high-speed railway bridge. Abstract Predicting the dynamic response of portal frame bridges is challenging because of the strong influence of the soil-structure interaction. This aspect adds complexity to the vibratory phenomenon, and, as a result, accurate numerical analyses are difficult to conduct and time-consuming. For this reason, the soil-structure interaction mechanism is seldom considered in the numerical models. However, as evidence shows, this constitutes an important source of discrepancy between numerical and experimental results. In this investigation, a study on an existing portal frame railway bridge is carried out. First, the identification of its modal parameters from experimental data is addressed. Then, a 3D finite element numerical model considering the track-bridge-soil system is implemented. Perfectly matched layers are considered at the model boundaries. The soil-structure interaction is evaluated and the results are used to implement a simplified model, on which the soil is substituted by a series of spring-dampers. After calibration, an experimental-numerical comparison is performed on the bridge modal parameters to validate the followed approach. Finally, the simplified model is used to predict the dynamic response of the portal frame measured under operating conditions. download the full-text of this paper (PDF, 13321 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
Back to top	©Civil-Comp Limited 2023 - terms & conditions