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Analysis of Seismic Responses of A Suspension Bridge at P1 Level

Author: WangZhiQing
Tutor: ZhangHui
School: Huazhong University of Science and Technology
Course: Structural Engineering
Keywords: Span suspension bridge Spatial variability Artificial seismic waves Nonlinear Time history analysis
CLC: U441.3
Type: Master's thesis
Year: 2005
Downloads: 110
Quote: 3
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Abstract


With the rapid development of the national economy , the construction of long-span bridges increasing number of long span suspension bridge due to the characteristics of its cable supported it superior to other load-bearing structure in the technical and economic , and therefore favored by the majority of designers . As the the lifeline engineering of bridge seismic design has become an indispensable part of the bridge design , the earthquake directly affect the safety and reliability of its structure . Domestic and foreign scholars have conducted a lot of research work dynamic performance of suspension bridges and seismic design method , the suspension bridge seismic response is the object of widespread concern . Structure calculation model used in the study of existing seismic response , motivation, analytical methods are not the same , there are some differences in the results . For a comprehensive analysis of the seismic response of a span suspension bridge , the response time history analysis method directly input seismic waves recorded real reaction the dynamic suspension bridge in the process of earthquake performance , easy to learn more about the structure of power in the entire process of earthquake . Firstly, the use of ANSYS software to establish a three-dimensional finite element model to analyze the prestressing of the main cable suspension bridges initial equilibrium configuration and stress stiffening , large deformation of its modes and frequency ; then using MATLAB language prepared artificial synthetic seismic wave program , were synthesized considering traveling wave effect and space - related multi-point vibration displacement time ; final time history analysis , three-dimensional finite element nonlinear earthquake simulation analysis of the suspension bridge , consider the ground motion spatial variability Suspension Bridge , compared to the shock consistent input traveling wave input , dynamic response of suspension bridges under multi-point input , and by comparison with the small deformation conditions , attempts to analyze the impact of the large deformation of the seismic response of the suspension bridge .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge vibration and damping device
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