Quantifying complex track stiffness response

In most (high-speed, HS) 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 guide lines. Something that will be addressed in this project.


Trafikverket requires adequate design guidelines for regular and HS 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 yrs. operational life). The main issue is to establish the bounds of permissible stiffness distributions along & 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.

Participants

Jelke Dijkstra (contact)

Biträdande professor vid Chalmers University of Technology, Architecture and Civil Engineering, GeoEngineering

Minna Karstunen

Professor vid Chalmers University of Technology, Architecture and Civil Engineering, GeoEngineering

Hossein Tahershamsi

Doktorand vid Chalmers University of Technology, Architecture and Civil Engineering, GeoEngineering

Funding

Swedish Transport Administration

Funding Chalmers participation during 2017–2020 with 1,600,000.00 SEK

Related Areas of Advance and Infrastructure

Sustainable development

Driving Forces

Transport

Areas of Advance

More information

Latest update

2018-03-13