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Seismic Response Analysis of Long-Span Railway Continuous Beam Bridges

Author: LiYu
Tutor: PuQianHui；ZhuangWeiLin
School: Southwest Jiaotong University
Course: Architecture and Civil Engineering
Keywords: Railway continuous beam bridge seismic response response spectrum time-history analysis
CLC: U442.55
Type: Master's thesis
Year: 2009
Downloads: 63
Quote: 1
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Abstract


With the development of economy, the long-span bridges have got very rapid development in our country. Meanwhile, there are more earthquakes in China and bridges are often regarded as lifeline buildings of the cities. So it is necessary to make a detailed and in-depth study of the seismic response for long-span bridges under earthquake. In this paper, with the background of Fu-Xia line Wulongjiang River large bridge, the basic theory of seismic response analysis are presented and at the same time some works to this bridge are done such as spectrum response analysis and elastic time-history analysis on the basis of Ansys software.The main contents of this thesis include:Spatial FE models for the railway continuous beam bridge are established. Based on these models, modal analysis is carried out and the effect of pile-soil interaction on bridge dynamic characteristics is also discussed in the process; On the basis of response spectrum methods as well as the modal analysis results, response spectrum analysis under 3-D seismic input circumstance is carried out; The time-history analysis of the continuous beam bridge is also carried out while performing comparison and analysis of internal forces and displacement response of various key sections under various seismic input circumstance.Based on above detailed calculation, comparison and analysis of this bridge, some conclusions and suggestions can be obtained, which are useful for carrying out seismic design for the long-span high-speed railway continuous beam bridge.

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CLC: > Transportation > Road transport > Bridges and Culverts > Investigation, design and calculation > Bridge Design > Damage Analysis and Seismic Design
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