As an important indicator of dynamic performance, the vibration transmission among multi-layer track-bridge structures for different bridge spans under the updated 400 km/h train loads are not clear. The vibration transmissions of the longitudinal slab track-bridge on three typical bridge span lengths (i.e., 24 m, 32 m, and 40 m) under five updated train speeds and three train weights were investigated in this paper by developing a refined vehicle-track-bridge model. The results show that the wheel load reduction rate, acceleration, and contract force gradually increase as train speed and train load increase, especial for the vertical vibration of 40 m span. The lateral displacement of the track structure on the 32 m span and the vertical displacement of the track structure on the 40m span are the largest among three spans. The vertical vibration transmission at 200 km/h is the highest among five train speeds, and the acceleration transmission of the 24 m span is larger than that of two other spans before 300 km/h. The vertical wheel-rail contact forces of the 40 m span under 100% capacity are close to the allowable limit values, and all of current track-bridge structures could meet the needs of the 400 km/h speed.


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    Titel :

    Vibration Transmission of Ballastless Track-bridge with Different Span Lengths under Updated High-speed Trains


    Weitere Titelangaben:

    KSCE J Civ Eng


    Beteiligte:
    Zhou, Rui (Autor:in) / Yang, Fuyan (Autor:in) / Liu, Hanlin (Autor:in) / Xu, Jingmang (Autor:in) / Feng, Qingsong (Autor:in) / Li, Shiya (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2024-09-01


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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