Important track degradation occurs in structure-embankment transitions, in which an abrupt change in track vertical stiffness arises, leading to a reduction in passengers comfort and safety. Although granular wedges are suggested by different railroad administrations as a solution to avoid these problems, they present some disadvantages which may affect track long-term performance. In this paper, a new solution designed with prefabricated reinforced concrete slabs is proposed. The aim of this solution is to guarantee a continuous and gradual track vertical stiffness transition in the vicinity of structures, overcoming granular wedges disadvantages. The aim of this study is to assess the performance of the novel wedge design by means of a 3-D FEM model and to compare it with the current solution.
The accelerations induced by different vehicles in the track are studied in the frequency domain from data collected in an extensive measurement campaign in the high speed line Madrid-Barcelona-French Border. In the first section, it will be determined which vehicle induces higher accelerations in the infrastructure taking into account the train model, speed and vehicle configuration (simple or double). Then, the vibration response will be described for the different vehicles running on the track, identifying the contribution of the quasi-static load as well as different dynamic effects typical from ballasted high speed railway tracks. Therefore, the frequency bands in which the different dynamic excitation may appear are calculated, collating the results with the measured accelerations and establishing a cause-effect relationship in the different acceleration spectra.
Original papers containing developments in vibroengineering of dynamical systems (macro-, micro-, nano-mechanical, mechatronic, biomechanics and etc. systems).The following subjects are principal topics: Vibration and wave processes; Vibration and wave technologies; Nonlinear vibrations; Vibroshock systems; Generation of vibrations and waves; Vibrostabilization; Transformation of motion by vibrations and waves; Dynamics of intelligent mechanical systems; Vibration control, identification, diagnostics and monitoring.All published papers are peer reviewed. General RequirementsThe authors must ensure that the paper presents an original unpublished work which is not under consideration for publication elsewhere.The following structure of the manuscript is recommended: abstract, keywords, nomenclature, introduction, main text, results, conclusions and references. Manuscript should be single-spaced, one column 162×240 mm format, using Microsoft Word 2007 or higher. Margins Figure caption starts with figure number 9 pt Bold as " Fig. 1 DAMAGE DETECTION OF PIPELINE MULTIPLE CRACKS USING PIEZOCERAMIC TRANSDUCERS 2828GUOFENG DU, LINSHENG HUO, QINGZHAO KONG, GANGBING SONG Received 6 October 2015; received in revised form 27 December 2015; accepted 22 April 2016 DOI http://dx.doi.org/10.21595/jve.2016 Abstract. Resonance is a phenomenon of utmost importance in railways engineering, leading to vast damages both in track and vehicles. Thus, to avoid the undesired effect of resonance, it must be studied, understood and predicted. To this aim, in the current study a FE model able to reproduce the dynamic behavior of a real stretch of track has been developed and its correct behavior has been calibrated with real data. Furthermore, different measures of mitigation have been proposed and its effect on displacements and vibrations in the mid-span section of a railway bridge have been evaluated. INELASTIC PARAMETRIC ANALYSIS OF FREQUENCIES AND SEISMIC RESPONSES OF SOIL-MULTISTOREY BIDIRECTIONAL ECCENTRIC STRUCTURE INTERACTION SYSTEM 3010 XIN-LIANG JIANG, YU-PING KUANG, NAN JIANG A U T H O R ' S P E R S O N A L C O P Y A U T H O R ' S P E R S O N A L C O P Y
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