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J.C. Sánchez-Quesada¹, E. Moliner¹, J. Chordà-Monsonís¹, 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

J.C. Sánchez-Quesada, E. Moliner, J. Chordà-Monsonís, A. Romero, P. Galvín, M.D. Martínez-Rodrigo, "Assessment of Ballast Stability in Multi-Span Simply-Supported Girder Bridges for Increasing Operational Speeds", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Eighteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 10, Paper 2.3, 2025,

Keywords: high–speed railway bridges, track–bridge interaction, skewed girder deck, transverse diaphragms, detailed ballast modelling, vertical acceleration.

Abstract

This paper is devoted to the study of track-bridge interaction phenomena in multi-span simply-supported girder bridges for high-speed railway traffic. When one-span numerical models are used to represent the real behavior of a multi-span bridge, the coupling effect exerted by the ballast layer between consecutive, theoretically independent spans is often neglected. This assumption could lead an underestimation of the maximum vibratory levels reached on the platform, which is one of the most restrictive criteria in the design phase of simply-supported bridges. Additionally, the dynamic response of skewed bridges with multi-track decks and open sections under railway loads is more complex than that of straight bridges, due to the participation of three-dimensional modes. Taking two Spanish real bridges as reference, detailed finite element models of these structures are implemented, along with a number of model variants that are used to evaluate the influence of the skew angle, diaphragm configuration, number of spans and their length on the maximum vertical acceleration levels under operating conditions. Whit this aim, this article try to identify those situations where the use of simplified one-span models could compromise the serviceability limit state of ballasted high speed railway bridges.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 10 PROCEEDINGS OF THE EIGHTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: P. Iványi, J. Kruis and B.H.V. Topping Paper 2.3 Assessment of Ballast Stability in Multi-Span Simply-Supported Girder Bridges for Increasing Operational Speeds J.C. Sánchez-Quesada¹, E. Moliner¹, J. Chordà-Monsonís¹, 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 Full Bibliographic Reference for this paper J.C. Sánchez-Quesada, E. Moliner, J. Chordà-Monsonís, A. Romero, P. Galvín, M.D. Martínez-Rodrigo, "Assessment of Ballast Stability in Multi-Span Simply-Supported Girder Bridges for Increasing Operational Speeds", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Eighteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 10, Paper 2.3, 2025, Keywords: high–speed railway bridges, track–bridge interaction, skewed girder deck, transverse diaphragms, detailed ballast modelling, vertical acceleration. Abstract This paper is devoted to the study of track-bridge interaction phenomena in multi-span simply-supported girder bridges for high-speed railway traffic. When one-span numerical models are used to represent the real behavior of a multi-span bridge, the coupling effect exerted by the ballast layer between consecutive, theoretically independent spans is often neglected. This assumption could lead an underestimation of the maximum vibratory levels reached on the platform, which is one of the most restrictive criteria in the design phase of simply-supported bridges. Additionally, the dynamic response of skewed bridges with multi-track decks and open sections under railway loads is more complex than that of straight bridges, due to the participation of three-dimensional modes. Taking two Spanish real bridges as reference, detailed finite element models of these structures are implemented, along with a number of model variants that are used to evaluate the influence of the skew angle, diaphragm configuration, number of spans and their length on the maximum vertical acceleration levels under operating conditions. Whit this aim, this article try to identify those situations where the use of simplified one-span models could compromise the serviceability limit state of ballasted high speed railway bridges. download the full-text of this paper (PDF, 6375 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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