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The Dynamic Response Analysis and Structure Optimization Study of the Suspension Bridge

Author: ZhaoJinGuang
Tutor: QianZuo
School: Jiangnan University
Course: Mechanical Design and Theory
Keywords: Suspension Finite element model Modal Analysis Response Analysis Optimization Dynamic Stress Test
CLC: U441
Type: Master's thesis
Year: 2008
Downloads: 150
Quote: 0
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Abstract


With the structural health monitoring system in the application of large-span bridges, bridge structures using finite element modeling and analysis more and more attention to study the safety of large-span bridge structure health monitoring and damage assessment and further static analysis, dynamic response analysis , structural optimization design, build bridges precise three-dimensional finite element model is very important. In this paper, large-span steel box suspension bridge as the research object, through parametric modeling method, a finite element model of suspension bridges, through static analysis and modal analysis of the results obtained compared with the measured data to verify the accuracy of the model sex. The role of dynamic loading bridge design and management are considered important factors. Nearly 2O years, around the bridge of the dynamic load response study progressed very quickly, especially in the suspension of the mobile load simulation, vehicle response, wind vibration, seismic response and stability of the tower, etc., these are the designers and researchers content of common concern. Therefore, the issue in the finite element model based on the proposed suspension of the vehicle under load response analysis stiffening girder structure optimization ideas and methods. Through a lot of analysis, calculation and testing, the subject of major work done can be attributed to the following sections: (a) introduce and establish orthotropic steel box girder bridge deck finite element model, it is more than the traditional \steel box girder model more accurately describes the overall and local properties, which not only achieve the purpose of the simplified model, but also to ensure high accuracy for subsequent research work has laid a foundation. (Two) to orthotropic steel box girder bridge deck suspension bridge as the research object, has moved the load response analysis, which clearly demonstrates the response characteristics of the entire bridge structure. (Three) to structural weight (volume) as the optimization objective of stiffening beam shape, size relationships for structural optimization method, to ensure the stiffening girder has sufficient resistance to external dynamic load strength and stiffness of the premise, to achieve economic, energy purposes. (Four) articles in Humen Bridge, for example, using parametric modeling method, a bridge finite element model of the entire bridge. Focus on the basis of the model of the bridge modal analysis, response analysis of moving loads stiffening beam optimization. Humen Bridge with existing data comparing measured data, this study further illustrates the correctness and practical value. Finally, the model of similar suspension and dynamic finite element analysis of the stress test results contrast, further proof of the correctness of modeling methods and draw suspension bridge structure response rule.

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics
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