中、小跨径连续梁桥地震响应分析

发布时间：2018-04-10 01:38

本文选题：中、小跨径连续梁桥　切入点：地震响应　出处：《长安大学》2014年硕士论文

【摘要】：本文以一座中、小跨径连续梁桥为研究对象，在论述桥梁抗震理论、抗震计算方法与结构动力特性计算方法的基础上，，建立桥梁有限元模型，对结构进行了动力特性分析。并分别在E1、E2水准的地震作用下采用反应谱与时程分析方法对桥梁进行地震响应分析，获得了中、小跨径连续梁桥动力性能及地震响应的基本特性。本文主要研究工作如下： 1．第一章对本课题的研究意义及背景进行分析论述，在此基础上，总结了桥梁地震响应的常见震害及抗震设计内容与方法，总结了国内外对于桥梁地震响应分析的研究现状。 2．第二章归纳了当今桥梁结构地震响应分析的几种基本理论方法与分析计算过程，包括静力法，弹塑性分析法，反应谱分析法，动态时程分析法等。 3．第三章首先归纳了桥梁结构振动的有限元基本分析方法，之后基于中小跨径桥梁的工程实例，建立了结构动力有限元计算模型，求得了结构的振型和相应的频率、周期等结构动力行为参数，并对计算结果进行了分析，获得了中、小跨径连续梁桥的一些动力特性结论。 4．第四章基于已建立的有限元模型，采用反应谱分析与时程分析的计算方法，对结构进行了地震响应分析，获得了中、小跨径桥梁典型地震响应特征。将地震分析的结果与规范值进行比较分析，进行了结构抗震安全性研究。 5．根据以上理论的阐述和实际工程的计算，最后提出一些相应的结论和建议，为实际工程中的地震相应分析和安全结构设计提供理论基础和计算依据。
[Abstract]:This paper takes a small span, continuous girder bridge as the research object, discusses the calculation method of bridge seismic theory, method and structure of dynamic characteristics of seismic calculation, establishes finite element model, the dynamic characteristics are analyzed. And in E1, the method of bridge seismic response spectrum analysis and time history the earthquake response analysis of E2 level under ground, obtained in small span continuous beam bridge dynamic characteristics and seismic response characteristics.
The main research work in this paper is as follows:
1., the first chapter analyzes and discusses the research significance and background of the subject. On this basis, summarizes the contents and methods of common earthquake damage and aseismic design for bridge seismic response, and summarizes the research status of bridge seismic response at home and abroad.
2., the second chapter summarizes several basic theoretical methods and analysis processes of seismic response analysis of bridge structures, including static method, elastoplastic analysis method, response spectrum analysis method, dynamic time history analysis method, etc.
3. the third chapter summarizes the basic finite element analysis method of bridge structure vibration, after small and Medium Span Bridges Based on the engineering examples, a dynamic finite element model, the modal structure and the corresponding frequency is obtained, the dynamic behavior of periodic structure parameters, and the results are analyzed and obtained. Conclusion some dynamic characteristics of small span continuous beam bridge.
4. the fourth chapter based on the established finite element model, the calculation method of response spectrum and time history analysis, the structure of the seismic response analysis, obtained in the small span bridge typical seismic response characteristics. The seismic analysis results and standard value for comparative analysis, and do research on the safety of structures.
5., according to the above theory and the calculation of actual project, finally, it puts forward some corresponding conclusions and suggestions, providing theoretical basis and calculation basis for the corresponding analysis and safety structure design in actual engineering.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

【参考文献】