大跨PC连续梁桥地震响应分析

发布时间：2018-04-10 09:36

本文选题：连续梁桥　切入点：地震响应分析　出处：《长沙理工大学》2015年硕士论文

【摘要】：我国是一个地震多发的国家,近年来我国连续发生多次大地震,对周边的公路基础设施造成严重的破坏。桥梁作为公路的重要组成部分,在整个线路中发挥着关键的作用,如果桥梁因为地震的破坏不能通车会导致整个线路的中断,会给救援工作带来很大阻碍,严重影响生命安全。大跨度连续梁桥在实际工程中已经成为应用最普遍的一种桥型,因为其所占的比例大,在地震到来时,破坏的几率就越大,因此对其抗震性能的分析和研究就显得尤为重要。本文以湘西自治洲G319国道泸溪绕城公路白沙大桥主桥为背景,在简述和总结了目前桥梁抗震分析理论方法后,选取两种目前在抗震分析上运用相对普遍的分析方法对工程背景进行抗震分析,主要研究内容如下:1.通过专业的土木结构有限元分析软件Midas/Civil,建立湘西自治洲G319国道泸溪绕城公路白沙大桥主桥有限元动力计算模型,并考虑桩-土-结构相互作用的前提下对其进行自身动力特性分析;2.按照地震设计烈度,在白沙大桥有限元模型上对其进行地震反应谱分析,探讨不同设计参数对桥梁结构地震响应的影响;3.按照地震设计烈度输入地震波,在白沙大桥有限元模型上进行一致激励下地震时程反应分析,并且将反应谱分析结果与一致激励下地震时程反应分析结果比较。
[Abstract]:China is an earthquake prone country, continuous occurrence of several large earthquakes in recent years, causing severe damage to roads surrounding infrastructure. As an important part of the highway bridge, plays a key role in the whole line, if the bridge is broken because not earthquake will lead to interruption of the whole traffic line that will bring great obstacles to the rescue work, seriously affect the safety of life. Long span continuous girder bridge has become a bridge is the most widely applied in practical engineering, because of its large proportion, in the earthquake comes, the greater the chance of failure, so the analysis and Research on the seismic performance of the it is particularly important. Based on the background of the main bridge of Xiangxi autonomous region G319 national highway of Luxi city highway Baisha bridge, summarizes the current theory and method in bridge seismic analysis, selecting two kinds of present in seismic analysis The use of relatively common analysis method for seismic analysis of the project background, the main research contents are as follows: 1. the finite element analysis for civil structure of professional software Midas/Civil, calculation model of Xiangxi autonomous region G319 national highway of Luxi City Highway Bridge Baisha a dynamic finite element, and considering the pile soil structure interaction under its own dynamic characteristic analysis; 2. in accordance with the seismic design intensity, in Baisha bridge finite element model of the seismic response spectrum analysis, the effects of different design parameters on the seismic response of bridge structures; 3. according to the seismic design intensity of earthquake wave input, the consistent excitation response analysis under the earthquake in Baisha bridge finite element model. And compare the response analysis results of response spectrum analysis results of uniform excitation and earthquake.

【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55

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