Lower Vertical Frequency Limit for Simply Supported Box-Girder on Moscow-Kazan High-Speed Railway Line

SONG Xiaodong; QIU Xiaowei; LI Xiaozhen; LIU Dejun; GUO Jianxun

doi:10.3969/j.issn.0258-2724.20170306

Volume 54 Issue 4

Jul. 2019

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Journal of Southwest Jiaotong University > 2019 > 54(4): 709-714.

SONG Xiaodong, QIU Xiaowei, LI Xiaozhen, LIU Dejun, GUO Jianxun. Lower Vertical Frequency Limit for Simply Supported Box-Girder on Moscow-Kazan High-Speed Railway Line[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 709-714. doi: 10.3969/j.issn.0258-2724.20170306

Citation:

SONG Xiaodong, QIU Xiaowei, LI Xiaozhen, LIU Dejun, GUO Jianxun. Lower Vertical Frequency Limit for Simply Supported Box-Girder on Moscow-Kazan High-Speed Railway Line[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 709-714. doi: 10.3969/j.issn.0258-2724.20170306

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Lower Vertical Frequency Limit for Simply Supported Box-Girder on Moscow-Kazan High-Speed Railway Line

doi: 10.3969/j.issn.0258-2724.20170306

Received Date: 08 May 2017
Rev Recd Date: 04 Jul 2018

Available Online: 23 Apr 2019

Publish Date: 01 Aug 2019

Abstract

Abstract

To study the lower vertical basic frequency limit of a simply supported box-girder on the Moscow-Kazan high-speed railway line, firstly, the vertical fundamental frequency of the prestressed concrete (PC) simply supported box-girder was calculated with theoretical formula. Then, according to the principle of the bridge dynamic effect under the action of a moving train should not surpass that of the designed value, the allowable impact factor of the girder was determined by utilizing the finite element method. Secondly, based on the moving load model, the dynamic simulation analysis was conducted to obtain the impact factor of the simply supported box-girder under a moving train. Finally, the lower vertical basic frequency limits of the PC simply supported box-girder for design speeds of 250, 300, 350 km/h, and 400 km/h were recommended. The results show that the peak of the dynamic response amplitude of the girder will appear at the first bend natural frequency. Adjusting the vertical basic frequency of the bridge can effectively reduce the vibration peak, which compensates for the vertical excitation frequency caused by the moving train. The lower vertical basic frequency limits of the 33.1 m span PC simply supported box-girder for design speeds of 250, 300, 350 km/h, and 400 km/h are recommended as 3.02, 3.63, 4.08 Hz, and 4.68 Hz, respectively.
- high speed railway,
- simply supported box-girder,
- vertical basic frequency limit,
- moving load; impact factor,

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Lower Vertical Frequency Limit for Simply Supported Box-Girder on Moscow-Kazan High-Speed Railway Line

doi: 10.3969/j.issn.0258-2724.20170306

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Lower Vertical Frequency Limit for Simply Supported Box-Girder on Moscow-Kazan High-Speed Railway Line

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