Modified Formula of Estimating Fundamental Frequency of Girder Bridge with Variable Cross-Section

Abstract:

Based on present research, there is a big difference between the estimation of the fundamental frequency of Girder Bridge obtained by the design code of bridge, issued by ministry of transport of the P.R. China in 2004, and the theoretical value in some cases. To overcome above issue, theoretical analysis combined with numerical simulation was applied to estimate the fundamental frequency of Girder Bridge with variable cross-section. The effect of the height ratio between mid-span cross-section and support cross-section on the fundamental frequency was discussed in detail. Finally, an improved formula was proposed to estimate the fundamental frequency of Girder Bridge, and the effectiveness of the proposed formula was verified.

• Periodical: Key Engineering Materials (Volume 540)
• Pages: 99-106
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.540.99
• Online since: January 2013
• Authors: Qing Fei Gao, Zong Lin Wang, Bin Qiang Guo
• Keywords: Estimation of Fundamental Frequency, Girder Bridge, Natural Vibration, Variable Cross-Section

References

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DOI: 10.1016/0141-0296(95)00037-8

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