大跨长联铁路连续梁减隔震研究

发布时间：2018-07-11 18:00

  本文选题：长联大跨 + 铁路连续梁　； 参考：《西安工业大学》2014年硕士论文

【摘要】：随着近年铁路技术的发展,大跨长联连续梁结构得到广泛应用,主桥跨度和联长不断刷新纪录。对大跨长联铁路连续梁的抗震性能及减隔震方案进行深入的研究分析,为提高该类桥梁抗震性与安全性设计提供一定的科学依据具有很重要的意义。本文在阐述结构地震反应分析基本理论的基础上,以乌锡铁路黄河特大桥为背景进行了以下几个方面的分析与探讨：1)采用桥梁有限元分析程序MIDAS/CIVIL2012建立全桥空间有限元模型,并对其模态进行分析。通过分析不同边界条件下结构的地震反应,总结桩-土相互作用对结构地震响应的影响。2)进行全桥地震响应的反应谱分析和时程分析,并对两种分析方法的计算结果进行比较。3)提出桥梁的减隔震方案,并对不同方案进行参数化分析,选择适合的减隔震方案。4)分析行波效应对长联大跨连续梁地震响应的影响。分析结果表明：减隔震技术能大幅度减小大跨长联铁路连续梁地震响应内力,并取得良好的经济效益,不同的减隔震设施减震效果不同,实际应用中应根据桥梁实际情况合理选择。
[Abstract]:With the development of railway technology in recent years, long-span continuous beam structure has been widely used. The seismic performance and isolation scheme of long-span continuous railway beams are deeply studied and analyzed. It is of great significance to provide scientific basis for improving the seismic performance and safety design of this kind of bridges. On the basis of expounding the basic theory of structural seismic response analysis, taking the Yellow River Bridge of Wuxi Railway as the background, this paper analyzes and discusses the following aspects: 1) using the bridge finite element analysis program Midas / CIVIL2012 to establish the spatial finite element model of the whole bridge. And the modal analysis is carried out. By analyzing the seismic response of structures under different boundary conditions, the influence of pile-soil interaction on the seismic response of the structure is summarized. 2) the response spectrum and time history analysis of the seismic response of the whole bridge are carried out. The results of the two methods are compared. 3) the seismic isolation scheme of the bridge is proposed, and the parameterized analysis of different schemes is carried out, and the suitable isolation scheme .4) is selected to analyze the influence of traveling wave effect on the seismic response of long-span continuous beam. The analysis results show that the seismic response internal force of long-span continuous beam can be greatly reduced and good economic benefits can be obtained. In practical application, reasonable selection should be made according to the actual situation of the bridge.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55
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本文编号：2116158