Track Structures and Components Laboratory

Anderson, United States

Track Structures and Components Laboratory

Anderson, United States
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Deshimaru T.,Track Structures and Components Laboratory | Tamagawa S.,Track Structures and Components Laboratory | Kataoka H.,Track Structures and Components Laboratory
Quarterly Report of RTRI (Railway Technical Research Institute) | Year: 2017

It is important for the design and verification of rail fastening system performance to clarify the permissible lateral force it can tolerate. This study proposes a method for predicting the fatigue life of rail clips. The validity of the method was confirmed on the basis of the relationship between the applied loads and stress on the rail clip, established in laboratory tests. The fatigue life of the rail clip was then estimated using the proposed method and the permissible lateral force for a conventional fastening system was derived using this estimation.


Kobayashi Y.,Steel and Hybrid Structures Laboratory | Fukumoto M.,Steel and Hybrid Structures Laboratory | Nishikawa Y.,Steel and Hybrid Structures Laboratory | Kataoka H.,Track Structures and Components Laboratory
Quarterly Report of RTRI (Railway Technical Research Institute) | Year: 2014

The new installation of Continuous Welded Rail (CWR) on existing steel bridges is often restricted because of their limited steel bearing capacity of longitudinal axial forces exerted by CWR loads. On the other hand, the capacity is mainly based on design calculation which has not been verified actually. In this research, the actual behavior and performance of CWR load and the bearing capacity were evaluated by field measurements and laboratory experiments with a view to promoting CWR installation on existing steel bridges.


Kataoka H.,Track Structures and Components Laboratory | Yanagawa H.,Track Structures and Components Laboratory | Iwasa Y.,Track Structures and Components Laboratory | Nishinomiya Y.,Track Structures and Components Laboratory
Quarterly Report of RTRI (Railway Technical Research Institute) (Japan) | Year: 2010

We used the finite element method to establish a technique to precisely evaluate the axial force, expansion and contraction of rails in areas with turnouts in succession integrated with a CWR on ballasted track laid on an earth roadbed or on ballastless track of viaduct. We carried out an on-site test in a CWR track section where two turnouts are located in succession integrated with a CWR on a ballasted track, and the test results were compared with the analytical results. We applied this technique to analysis of the rail axial force characteristics of a CWR connected with a turnout directly fastened to viaducts, and clarified the relationship between girder bridge length, girder arrangement and axial force in rails.

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