The Seismic Frequency Response Function Calculation of Multi-Span Simply Supported Girder Bridge

Abstract:

In order to simplify the analysis and calculation of multi-span simply supported girder bridge, the seismic frequency response function equation of longitudinal vibration for single-span simply supported girder bridge is established, based on the Fourier transform of the motion equations of multi-degree-of-freedom system. The calculation method of the seismic frequency response for the vertical moment and displacement of multi-span simply supported beam bridge is proposed according to the transfer matrix principle. Taking a bridge of Qinghai-Tibet Railway as an example, the maximum displacement and moment are solved. The result shows that: the displacement of the control section of the side spans is smaller than that of the middle of the bridge, while the moment is opposite. The corresponding Fourier amplitude spectrums under the pulse loads are given finally.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 2006-2009
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.2006
• Online since: September 2013
• Authors: Qing Qing Ma*, Hong Ru Zhang
• Keywords: Fourier Transform, Multi-Span Simply Supported Girder Bridge, Seismic Frequency Response, Transfer Matrix Principle

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