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

被引：153

作者：

Costa, Pedro Alves ^{[1
]}

Calcada, Rui ^{[1
]}

Cardoso, Antonio Silva ^{[1
]}

Bodare, Anders ^{[2
]}

机构：

[1] Univ Porto, Fac Engn, P-4200465 Oporto, Portugal

[2] Geo Risk & Vibrat Scandinavia AB, S-17145 Solna, Sweden

来源：

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING | 2010年 / 30卷 / 04期

关键词：

High-speed railway track; Soft soil; Equivalent linear analysis; 2.5D finite element method; Frequency-domain analysis; GROUND VIBRATIONS; INFINITE; TRAINS; MODEL; PREDICTION; BEHAVIOR; MODULUS; FINITE;

D O I：

10.1016/j.soildyn.2009.11.002

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

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. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：221 / 235

页数：15

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