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Improvement effects of bottom lateral bracings on dynamic performance of curved steel twin I-girder bridges under running vehicles

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Abstract

The torsional stiffness of curved twin I-girder bridges is very low, which may lead to a vulnerability to eccentric dynamic loads. This study is intended to investigate the improvement effect of bottom lateral bracings on dynamic performance of curved twin I-girder bridges under running vehicles, using a developed numerical approach. In this approach, to conduct the running vehicle-bridge interaction analysis, finite element method is used to create the detailed models of both the curved bridge and the running vehicle. Parametric studies are carried out using these numerical models to investigate the effect of bottom lateral bracings on the dynamic performance of the curved bridge under running vehicles. The numerical results indicate that the proposed bottom lateral bracing systems can increase the torsional stiffness of the bridge, whose increasing rate depends on the type of bracing configuration. The bottom lateral bracings can also distribute dynamic loads smoothly between the two main girders, which leads to a more stable structure.

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Authors and Affiliations

  1. Graduate School of Eng., Hokkaido University, Kita 13 Nishi 8, kita-ku, Sapporo, 060-8628, Japan

    Md. Robiul Awall

  2. Faculty of Eng., Hokkaido University, Kita 13 Nishi 8, kita-ku, Sapporo, 060-8628, Japan

    Toshiro Hayashikawa, Xingwen He & Takashi Matsumoto

Authors
  1. Md. Robiul Awall
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  2. Toshiro Hayashikawa
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  3. Xingwen He
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  4. Takashi Matsumoto
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Corresponding author

Correspondence to Md. Robiul Awall.

Additional information

Note.-Discussion open until November 1, 2013. This manuscript for this paper was submitted for review and possible publication on December 8, 2011; approved on March 7, 2013.

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Awall, M.R., Hayashikawa, T., He, X. et al. Improvement effects of bottom lateral bracings on dynamic performance of curved steel twin I-girder bridges under running vehicles. Int J Steel Struct 13, 275–290 (2013). https://doi.org/10.1007/s13296-013-2007-4

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  • DOI: https://doi.org/10.1007/s13296-013-2007-4

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