Two FE Models to Analyse the Dynamic Response of Short Span Simply-Supported Oblique High-Speed Railway Bridges: Comparison and Experimental Validation

In this paper the dynamic response of a particular type of high-speed railway bridge common in the Spanish railway system is analysed with the aim of evaluating the levels of vertical vibrations experienced at the platform. To this end, Bracea I bridge which belongs to the Madrid-Sevilla High Speed railway line is selected. The bridge is composed by two identical short simply supported spans. The pre-stressed concrete girders deck dimensions and level of obliquity make this structure prone to (i) experience important vertical accelerations under railway traffic and (ii) present a dynamic response with a high participation of modes different from the longitudinal bending one. Therefore the structure is not expected to behave as a beam-type structure. The results of an experimental campaign recently performed at the site are presented with the objective of characterising the soil dynamic properties and the structure response under ambient vibration conditions and under railway traffic. The experimental response of the bridge is then compared in the time and frequency domains to numerical predictions given by two Finite Element models which adopt common assumptions in engineering practice. The study provides interesting conclusions regarding the structure experimental response under resonant and not resonant conditions. Additionally, conclusions regarding the adequacy of the numerical models for predicting the bridge response and assessing the Serviceability Limit State of vertical acceleration in ballasted railways are presented.

• Record URL:
  • https://doi.org/10.1016/j.engstruct.2018.03.052
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0141029617332649
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01410296
• Supplemental Notes:
  • Abstract reprinted with permission of Elsevier.
• Authors:
  • Galvín, P
  • Romero, A
  • Moliner, E
  • Mart�nez-Rodrigo, M D
• Publication Date: 2018-7-15

Language

• English

Media Info

• Media Type: Web
• Features: Figures; Photos; References; Tables;
• Pagination: pp 48-64
• Serial:
  • Engineering Structures
  • Volume: 167
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0141-0296
  • Serial URL: http://www.sciencedirect.com/science/journal/01410296

Subject/Index Terms

• TRT Terms: Finite element method; High speed rail; Railroad bridges; Train track dynamics; Vibration tests
• Identifier Terms: Madrid-Seville High Speed Railway
• Uncontrolled Terms: Dynamic response
• Geographic Terms: Spain
• Subject Areas: Bridges and other structures; Maintenance and Preservation; Railroads;

Filing Info

• Accession Number: 01674060
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 28 2018 2:03PM