Quantifying complex track stiffness response
| 项目名称： | Quantifying complex track stiffness response |
| 摘要： | In most high-speed line infrastructure, very strict alignment and stiffness variations are prescribed. These perhaps result in overly costly track configurations being pre-scribed to prevent additional maintenance issues resulting from track degradation down the line. At present the complete system of railway head, sleepers, subgrade (slab), embankment and subsoil are not considered in setting these guidelines. Something that will be addressed in this project. Trafikverket (Swedish Transport Aministration) requires adequate design guidelines for regular and high speed railway systems that ensure trouble free low maintenance operation of their track with smooth transitions, that incorporate short term dynamic loading considerations (e.g. vibrations from a single bogie) and accumulated effects over long-term loading (e.g. 60 years operational life). The main issue is to establish the bounds of permissible stiffness distributions along and below the track, this includes track alignment, during its life-time that minimises construction and maintenance costs. Here, stiffness refers to the evolving track-subgrade-soil system. The project aims to use a combination of quasi-static and dynamic numerical analyses to establish a generalised guideline, in terms of a maximum allowable variation in track compliance (rather than alignment alone), to fulfil the operational needs of a railway track. |
| 资金： | 0.00 |
| 资助组织： | Trafikverket, Sweden |
| 项目负责人： | Dijkstra, Jelke |
| 执行机构： | Chalmers tekniska h�gskola AB |
| 开始时间： | 20170815 |
| 预计完成日期： | 20191215 |
| 实际结束时间： | 0 |
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