独柱墩桥梁横向减震分析

发布时间：2018-03-28 19:12

本文选题：独柱墩连续梁桥　切入点：横向减震　出处：《吉林建筑大学》2014年硕士论文

【摘要】：独柱墩连续梁桥在城市立交桥中常被采用，为使其尽量少的影响地面交通，，桥墩直径应受到限制，桥梁横桥向支座间距减小，其稳定系数较低。桥梁工程作为生命线工程一旦在地震中遭到破坏，使次生灾害发生，严重影响了震后救灾工作和人民的生命财产安全。因此，对桥梁结构进行减隔震设计是有必要的。近百年来发生的地震灾害表明，地震对桥梁的破坏不仅是来自于纵桥向的落梁和破坏，还有很多是来自于横桥向的落梁和桥墩的剪切破坏。例如日本的阪神地震和我国的汶川地震中，有很多立交桥的破坏都是由于横桥向地震引起的。独柱墩连续梁立交桥的横向稳定性较差，所以对其进减隔震设计应该引起我们的重视。本文以长春市某快速路立交桥为工程背景，利用有限元软件MIDASCIVIL对桥梁建立动力分析模型，并进行减震分析，主要研究内容如下： (1)在采用球型钢支座板式橡胶支座和铅芯橡胶支座三种不同支座情况下，依据动力学理论分别建立了动力分析模型。依据《公路桥梁抗震设计细则》对桥梁结构进行减隔震设计。研究了桥梁结构在E2地震作用下的响应，考察了桥梁在采用三种不同支座时的反应谱分析结果，对结果进行分析比较，找到了规律。 (2)对建立的三跨独柱墩立交桥动力模型进行动力时程分析，研究了在横向地震作用下，有纵坡的三跨独柱墩连续梁桥桥墩的受力特点，以及桥梁抗震设计重点注意的问题。对反应谱分析结果与时程分析结果作对比，两种方法计算的桥梁地震反应结果误差在20%以内，满足规范的要求。
[Abstract]:Continuous beam bridges with single column piers are often used in urban flyovers. In order to minimize the impact on ground traffic, the diameter of piers should be restricted, and the distance between the transverse supports of the bridges should be reduced. The stability coefficient is relatively low. Once the bridge engineering as lifeline project is destroyed in the earthquake, the secondary disaster occurs, which seriously affects the disaster relief work after the earthquake and the safety of people's life and property. Therefore, the bridge structure is reduced? Isolation design is necessary. The earthquake disasters in the past hundred years have shown that the damage to bridges caused by earthquakes is not only caused by the falling beams and damage of longitudinal bridges. Many of them were caused by shearing failure of beams and piers in the direction of Yokoqiao, such as the Hanshin earthquake in Japan and the Wenchuan earthquake in China. The failure of many overpass bridges is caused by the lateral earthquake. The lateral stability of single column pier continuous beam overpass bridge is poor, so we should pay more attention to the design of isolation and isolation. In this paper, based on the engineering background of an expressway interchange in Changchun, the dynamic analysis model of the bridge is established by using the finite element software MIDASCIVIL, and the vibration reduction analysis is carried out. The main research contents are as follows:. Are ball steel bearings in use? In the case of three different supports, the plate rubber bearing and the lead rubber bearing, According to the dynamic theory, the dynamic analysis model is established, and the seismic isolation design of the bridge structure is carried out according to the detailed rules for Seismic Design of Highway Bridges. The response of the bridge structure under E2 earthquake is studied. The response spectrum analysis results of the bridge with three different supports were investigated, and the results were compared and the rules were found. 2) the dynamic time history analysis of the dynamic model of the three span single column pier overpass is carried out, and the bearing characteristics of the pier of the three span single column continuous beam bridge with longitudinal slope under the action of transverse earthquake are studied. The results of response spectrum analysis and time-history analysis show that the error of seismic response results calculated by the two methods is less than 20%, which meets the requirements of the code.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

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