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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. Source


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. Source

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