Influence of soil non-linearity on the dynamic response of high-speed railway tracks

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Pedro Alves Costa (Author) FEUP; Rui Calcada (Author) FEUP; Antonio Silva Cardoso (Author) FEUP; Anders Bodare (Author) Other

Journal

Title: Soil Dynamics and Earthquake Engineering

Vol. 30 No. 4

Pages: 221-235

ISSN: 0267-7261

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 72 Citations

ISI Web of Science

Scopus - 148 Citations

Scientific classification

FOS: Engineering and technology > Environmental engineering

CORDIS: Technological sciences

Other information

Authenticus ID: P-003-858

DOI: 10.1016/j.soildyn.2009.11.002

Abstract (EN): The main objectives of this paper are the evaluation of the relevance of the non-linear behaviour of the soil on the track response and the validation of a methodology, which includes these effects through an equivalent linear analysis. The proposed numerical model is based on 2.5D finite/infinite elements method, Coupled with an iterative procedure ill order to obtain all agreement between the strain levels and the dynamic properties of the materials. In order to validate the model, the case study of Ledsgard was simulated, and the experimental and numerical results of displacements of the track were compared, considering several Circulation speeds for the X2000 train. From the results, it is possible to recognize that the stiffness degradation, function of the strain level plays a relevant role for the case of, high-speed railway lines oil Soft ground. Moreover, the simulations developed with the proposed methodology provided similar results to those observed, independently of the train speed, contrary to what was obtained when the elastic linear model was used.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15