不同結(jié)構(gòu)體系下的高低塔斜拉橋地震響應(yīng)分析研究
本文選題:高低塔斜拉橋 + 反應(yīng)譜。 參考:《西南交通大學(xué)》2015年碩士論文
【摘要】:隨著我國(guó)改革開(kāi)放的進(jìn)一步深化,我國(guó)的經(jīng)濟(jì)建設(shè)也得到了長(zhǎng)足的發(fā)展,基礎(chǔ)設(shè)施的建設(shè)也正如火如荼地開(kāi)展。建立起四通八達(dá)的現(xiàn)代交通網(wǎng)絡(luò),不僅對(duì)我國(guó)的經(jīng)濟(jì)建設(shè)具有明顯的促進(jìn)作用,更是在促進(jìn)不同民族、不同地域間的文化交流、鞏固國(guó)防等方面發(fā)揮著重要作用。橋梁,正是交通工程中的咽喉。橋梁作為附著在地球表層的構(gòu)筑物,會(huì)因?yàn)榈卣鸲獾骄薮蟮钠茐。我?guó)是一個(gè)地震頻發(fā)的國(guó)家,地震給我國(guó)帶來(lái)的經(jīng)濟(jì)損失不容小覷。斜拉橋作為一種跨越能力強(qiáng)的構(gòu)筑物,在地震過(guò)程中發(fā)揮其優(yōu)越抗震性能的時(shí)候,不僅是確保不發(fā)生巨大經(jīng)濟(jì)損失的需要,更是在地震搶險(xiǎn)過(guò)程中保證生命線暢通的需要。本文在查閱相關(guān)文獻(xiàn)資料的基礎(chǔ)上,以四川瀘州的黃艤大橋作為工程背景,對(duì)高低塔斜拉橋的地震響應(yīng)進(jìn)行了一下幾個(gè)方面的研究:1、先對(duì)彈性靜力法、反應(yīng)譜法、動(dòng)態(tài)時(shí)程分析法、功率譜法等抗震分析理論方法進(jìn)行了一個(gè)大概闡述分析,總結(jié)一下這些方法的特點(diǎn);2、利用橋梁軟件MIDAS/Civil對(duì)黃艤大橋進(jìn)行有限元模擬,分析了此類(lèi)橋型的動(dòng)力特性;3、通過(guò)不同的地震輸入方式及空間組合,采用反應(yīng)譜法對(duì)黃艤大橋進(jìn)行地震反應(yīng)分析;4、采用動(dòng)態(tài)時(shí)程分析法分別對(duì)漂浮體系、半漂浮體系和鋼構(gòu)體系下的大橋模型進(jìn)行地震響應(yīng)分析并對(duì)比其中的差異,探討不同地震激勵(lì)方式對(duì)結(jié)構(gòu)地震響應(yīng)的影響,得到一些有益的結(jié)論;5、對(duì)比分析不同參數(shù)設(shè)置下的粘滯阻尼對(duì)橋梁抗震性能的影響;6、綜合反應(yīng)譜和動(dòng)態(tài)時(shí)程分析計(jì)算結(jié)果,對(duì)不同結(jié)構(gòu)體系下的高低塔斜拉橋的地震響應(yīng)特點(diǎn)進(jìn)行總結(jié)。
[Abstract]:With the further deepening of China's reform and opening up, China's economic construction has also been greatly developed, infrastructure construction is also in full swing. The establishment of modern traffic network in all directions plays an important role not only in promoting the economic construction of our country, but also in promoting the cultural exchange among different nationalities and regions, consolidating national defense, and so on. Bridge is the throat of traffic engineering. Bridges, as structures attached to the surface of the earth, are severely damaged by earthquakes. China is a country with frequent earthquakes, and the economic losses caused by earthquakes should not be underestimated. As a kind of structure with strong span ability, cable-stayed bridge is not only the need to ensure that there is no huge economic loss, but also the need to ensure the smooth flow of lifeline in the course of earthquake rescue. On the basis of consulting relevant documents and taking Huangyue Bridge in Luzhou, Sichuan Province as the engineering background, this paper studies the seismic response of high and low tower cable-stayed bridges in several aspects: 1. First, the elastic static method and the response spectrum method are studied. The dynamic time history analysis method, power spectrum method and other seismic analysis theory methods are discussed in this paper. The characteristics of these methods are summarized. The bridge software MIDAS/Civil is used to simulate the Huangyue Bridge by finite element method. The dynamic characteristics of this kind of bridge are analyzed in this paper. Through different seismic input modes and spatial combinations, the seismic response analysis of Huangyue Bridge is carried out by using response spectrum method, and the floating system is analyzed by dynamic time history analysis method, respectively. The seismic response of the bridge model under semi-floating system and steel structure system is analyzed and compared, and the influence of different seismic excitation modes on the seismic response of the structure is discussed. Some useful conclusions are obtained. The effects of viscous damping under different parameters on the seismic performance of the bridge are compared and analyzed. The comprehensive response spectrum and dynamic time-history analysis results are analyzed. The seismic response characteristics of high and low tower cable-stayed bridges with different structures are summarized.
【學(xué)位授予單位】:西南交通大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類(lèi)號(hào)】:U442.55;U448.27
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