本文選題：獨柱墩連續(xù)梁橋　切入點：橫向減震　出處：《吉林建筑大學(xué)》2014年碩士論文

【摘要】：獨柱墩連續(xù)梁橋在城市立交橋中常被采用，為使其盡量少的影響地面交通，，橋墩直徑應(yīng)受到限制，橋梁橫橋向支座間距減小，其穩(wěn)定系數(shù)較低。橋梁工程作為生命線工程一旦在地震中遭到破壞，使次生災(zāi)害發(fā)生，嚴(yán)重影響了震后救災(zāi)工作和人民的生命財產(chǎn)安全。因此，對橋梁結(jié)構(gòu)進(jìn)行減隔震設(shè)計是有必要的。 近百年來發(fā)生的地震災(zāi)害表明，地震對橋梁的破壞不僅是來自于縱橋向的落梁和破壞，還有很多是來自于橫橋向的落梁和橋墩的剪切破壞。例如日本的阪神地震和我國的汶川地震中，有很多立交橋的破壞都是由于橫橋向地震引起的。獨柱墩連續(xù)梁立交橋的橫向穩(wěn)定性較差，所以對其進(jìn)減隔震設(shè)計應(yīng)該引起我們的重視。 本文以長春市某快速路立交橋為工程背景，利用有限元軟件MIDASCIVIL對橋梁建立動力分析模型，并進(jìn)行減震分析，主要研究內(nèi)容如下： (1)在采用球型鋼支座板式橡膠支座和鉛芯橡膠支座三種不同支座情況下，依據(jù)動力學(xué)理論分別建立了動力分析模型。依據(jù)《公路橋梁抗震設(shè)計細(xì)則》對橋梁結(jié)構(gòu)進(jìn)行減隔震設(shè)計。研究了橋梁結(jié)構(gòu)在E2地震作用下的響應(yīng)，考察了橋梁在采用三種不同支座時的反應(yīng)譜分析結(jié)果，對結(jié)果進(jìn)行分析比較，找到了規(guī)律。 (2)對建立的三跨獨柱墩立交橋動力模型進(jìn)行動力時程分析，研究了在橫向地震作用下，有縱坡的三跨獨柱墩連續(xù)梁橋橋墩的受力特點，以及橋梁抗震設(shè)計重點注意的問題。對反應(yīng)譜分析結(jié)果與時程分析結(jié)果作對比，兩種方法計算的橋梁地震反應(yīng)結(jié)果誤差在20%以內(nèi)，滿足規(guī)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.
【學(xué)位授予單位】：吉林建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U442.55

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