【摘要】：大跨度纜索體系橋梁以其強(qiáng)大的跨越能力而成為許多重要交通干線的樞紐,而這些重要的交通干線往往是關(guān)系國(guó)民經(jīng)濟(jì)的生命線工程。我國(guó)是一個(gè)地震頻發(fā)的國(guó)家,保障大跨度橋梁在地震作用下的安全是非常重要的。截止目前,我國(guó)興建了許多大跨度橋梁,結(jié)構(gòu)越來(lái)越柔,周期越來(lái)越長(zhǎng),傳統(tǒng)的抗震方法已經(jīng)難以應(yīng)付,如何能夠既保證大跨度橋梁的結(jié)構(gòu)安全,又能使設(shè)計(jì)不致于過(guò)分保守,成為目前大跨度橋梁領(lǐng)域的重要課題。本文以蘇通大橋主橋——1088米跨度斜拉橋?yàn)檠芯繉?duì)象,基于SAP2000有限元程序,對(duì)大跨度斜拉橋在地震作用下的地震反應(yīng)、減隔震方法進(jìn)行了研究。主要研究?jī)?nèi)容如下:1.大跨度斜拉橋動(dòng)力特性研究。根據(jù)特征值理論,建立有限元模型,分析大跨度斜拉橋自由振動(dòng)規(guī)律,根據(jù)模態(tài)分析結(jié)果預(yù)測(cè)地震反應(yīng)。2.搜集橋址處地質(zhì)資料,按規(guī)范確定加速度設(shè)計(jì)反應(yīng)譜,根據(jù)人工合成地震波理論,以三角級(jí)數(shù)法編制相應(yīng)程序合成人工地震波,并進(jìn)行多維、多角度地震動(dòng)輸入下大跨度斜拉橋線性及非線性動(dòng)力時(shí)程分析,總結(jié)此類橋梁的地震反應(yīng)規(guī)律。3.考慮地震動(dòng)空間差異的影響,對(duì)大跨度斜拉橋進(jìn)行考慮行波效應(yīng)的動(dòng)力時(shí)程分析,并與一致激勵(lì)情況對(duì)比,研究行波效應(yīng)對(duì)此類橋梁地震反應(yīng)的影響。4.分析并選擇大跨度斜拉橋的合理抗震措施,分別進(jìn)行縱向安裝粘滯阻尼器,橫向安裝TMD減震控制系統(tǒng)的動(dòng)力時(shí)程分析,研究其減震效果,并對(duì)大跨度斜拉橋的減震措施給出評(píng)價(jià)。
[Abstract]:Long-span cable system bridge has become the hub of many important traffic trunk lines because of its strong leapfrogging ability, and these important traffic trunk lines are often lifeline projects related to the national economy. China is a country with frequent earthquakes, so it is very important to ensure the safety of long-span bridges under earthquake action. Up to now, many long-span bridges have been built in our country, the structure is more and more flexible, the period is longer and longer, the traditional seismic method has been difficult to cope with. How to not only ensure the structural safety of long-span bridges, but also make the design not too conservative, has become an important topic in the field of long-span bridges. In this paper, the 1088 m span cable-stayed bridge, the main bridge of Sutong Bridge, is taken as the research object, and the seismic response and isolation method of long-span cable-stayed bridge under earthquake are studied based on SAP2000 finite element program. The main research contents are as follows: 1. Study on dynamic characteristics of long-span cable-stayed bridge. According to the eigenvalue theory, the finite element model is established to analyze the free vibration law of long-span cable-stayed bridge, and the seismic response is predicted according to the results of modal analysis. According to the theory of synthetic seismic wave, the corresponding program is compiled to synthesize artificial seismic wave, and the linear and nonlinear dynamic time history analysis of long-span cable-stayed bridge under multi-dimensional and multi-angle ground motion input is carried out, and the seismic response law of this kind of bridge is summarized. Considering the influence of spatial difference of ground motion, the dynamic time history analysis of long-span cable-stayed bridge considering traveling wave effect is carried out, and compared with the uniform excitation, the influence of traveling wave effect on seismic response of this kind of bridge is studied. 4. The reasonable seismic measures of long-span cable-stayed bridge are analyzed and selected, and the dynamic time history analysis of longitudinal installation of viscous dampers and transverse installation of TMD damping control system are carried out, the damping effect is studied, and the damping measures of long-span cable-stayed bridge are evaluated.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U442.55;U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 李思東;趙智慧;;傾斜巖面場(chǎng)地的橋梁地震分析[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年S1期

2 謝禮立,羅學(xué)海;“國(guó)際減輕自然災(zāi)害十年”和地震工程研究的任務(wù)[J];地震工程與工程振動(dòng);1990年04期

3 張風(fēng)華,謝禮立,范立礎(chǔ);城市防震減災(zāi)能力評(píng)估研究[J];地震學(xué)報(bào);2004年03期

4 屈鐵軍，，王君杰，王前信;空間變化的地震動(dòng)功率譜的實(shí)用模型[J];地震學(xué)報(bào);1996年01期

5 范立礎(chǔ),王君杰,陳瑋;非一致地震激勵(lì)下大跨度斜拉橋的響應(yīng)特征[J];計(jì)算力學(xué)學(xué)報(bào);2001年03期

6 項(xiàng)海帆;斜張橋在行波作用下的地震反應(yīng)分析[J];同濟(jì)大學(xué)學(xué)報(bào);1983年02期

7 李麗,蔣澤漢,邱新林,王振領(lǐng);斜拉橋地震響應(yīng)非線性時(shí)程分析[J];西南交通大學(xué)學(xué)報(bào);2002年S1期

8 李忠獻(xiàn),黃健,丁陽(yáng),史志利;不同地震激勵(lì)下大跨度斜拉橋的地震反應(yīng)分析[J];中國(guó)公路學(xué)報(bào);2005年03期

相關(guān)碩士學(xué)位論文 前1條

1 劉逵;大跨度斜拉橋非一致激勵(lì)地震反應(yīng)分析及減震設(shè)計(jì)[D];西南交通大學(xué);2010年

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