發(fā)布時(shí)間：2018-01-12 10:34

  本文關(guān)鍵詞：曲線連續(xù)箱梁橋動(dòng)力計(jì)算及減隔震設(shè)施分析　出處：《長(zhǎng)安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 曲線連續(xù)箱梁橋 振動(dòng)特性 最不利激勵(lì)方向 減隔震支座 擋塊

【摘要】：曲線橋梁因其線型布置靈活、造型優(yōu)美而被廣泛用于城市立交工程，，但在近年來(lái)的破壞性較大的地震中，曲線連續(xù)梁橋仍出現(xiàn)了不同程度的破壞，對(duì)曲線連續(xù)箱梁橋的地震反應(yīng)規(guī)律和減隔震設(shè)施進(jìn)行研究具有一定的急迫性。 本文以兩跨曲線連續(xù)箱梁橋?yàn)閷?duì)象研究，對(duì)曲線箱梁橋動(dòng)力響應(yīng)及減隔震設(shè)施進(jìn)行了分析，研究?jī)?nèi)容如下： 1.分析橋梁結(jié)構(gòu)的震害及在震害中得到的啟示，討論了減隔震技術(shù)的機(jī)理，詳細(xì)的論述了如何準(zhǔn)確的建立有限元分析模型，及在有限元分析模型件中如何準(zhǔn)確的考慮支座及樁土結(jié)構(gòu)相互作用等。 2.研究了曲率半徑及是否考慮樁土作用對(duì)振動(dòng)特性的影響，在考慮樁土相互作用分析時(shí)必須要截取更多階數(shù)的振型使計(jì)算的結(jié)果更準(zhǔn)確，并且考慮樁土相互作用與否，對(duì)結(jié)構(gòu)低階振形變化沒(méi)有明顯影響。 3.不同方向地震波激勵(lì)下城市曲線橋的地震響應(yīng)差別非常大，對(duì)不同曲率半徑的有限元模型進(jìn)行了單向反應(yīng)譜激勵(lì)分析，激勵(lì)方向0~180°增量10°輸入。通過(guò)對(duì)比驗(yàn)證了該方法的有效性，并且得到不同曲率半徑下反應(yīng)譜分析的一般規(guī)律。 4.對(duì)鉛芯橡膠支座和高阻尼橡膠支座建立了力學(xué)模型和模擬計(jì)算，分了兩種支座的隔震性能，通過(guò)對(duì)比得出高阻尼橡膠支座比鉛芯橡膠隔震性能要好的結(jié)論，并比較了不同的剪切模量對(duì)隔震性能的影響。 5.針對(duì)擋塊在有限元軟件中的模擬，分析了不同類型的擋塊對(duì)橋梁隔震的影響，并且比較了不同擋塊間隙對(duì)隔震的影響，并提出了對(duì)減隔震抗震設(shè)計(jì)的建議。
[Abstract]:Curved bridges are widely used in urban interchange engineering because of their flexible layout and graceful shape. However, in recent years, in the destructive earthquake, curved continuous beam bridges still have different degrees of damage. It is urgent to study the seismic response and isolation facilities of curved continuous box girder bridges. In this paper, the dynamic response and isolation facilities of curved continuous box girder bridge are analyzed. The research contents are as follows: 1. Analyze the earthquake damage of bridge structure and the inspiration obtained in the earthquake disaster, discuss the mechanism of isolation technology, and discuss in detail how to establish the finite element analysis model accurately. And how to consider the bearing and pile-soil structure interaction accurately in the finite element analysis model. 2. The radius of curvature and the effect of pile-soil action on vibration characteristics are studied. In the analysis of pile-soil interaction, more order vibration modes must be intercepted to make the results more accurate. Considering the pile-soil interaction or not, there is no obvious effect on the low order vibration of the structure. 3. The seismic response of urban curved bridge under different direction seismic wave excitation is very different. The unidirectional response spectrum excitation analysis of the finite element model with different curvature radius is carried out. The excitation direction is 0 ~ 180 擄increment 10 擄input. The validity of the method is verified by comparison, and the general law of response spectrum analysis under different curvature radii is obtained. 4. The mechanical model and simulation calculation of the lead rubber bearing and the high damping rubber bearing are established, and the isolation performance of the two kinds of bearings is divided. It is concluded that the high damping rubber bearing is better than lead rubber in isolation performance, and the effect of different shear modulus on isolation performance is compared. 5. According to the simulation of the block in the finite element software, the influence of different types of block on the isolation of bridge is analyzed, and the influence of different block gap on isolation is compared. Suggestions for seismic design of seismic isolation are also put forward.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.213;U442.55

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 劉海卿;王學(xué)慶;劉嘉;;SMA絞線-疊層橡膠復(fù)合支座振動(dòng)臺(tái)試驗(yàn)研究[J];地震工程與工程振動(dòng);2008年03期

2 殷鵬程;葉愛(ài)君;;從中美規(guī)范比較探討橋梁結(jié)構(gòu)抗震體系[J];工程抗震與加固改造;2009年03期

3 胡勃,袁萬(wàn)城,范立礎(chǔ);橋梁抗震強(qiáng)度設(shè)計(jì)方法的可靠性評(píng)價(jià)[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);1999年01期

4 袁萬(wàn)城，胡勃，范立礎(chǔ);柱式橋墩橫向抗震性能及評(píng)價(jià)[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);1996年06期

5 胡兆同,劉健新;橋梁鉛銷橡膠支座性能的試驗(yàn)研究[J];西安公路交通大學(xué)學(xué)報(bào);1998年02期

6 范立礎(chǔ),王志強(qiáng);我國(guó)橋梁隔震技術(shù)的應(yīng)用[J];振動(dòng)工程學(xué)報(bào);1999年02期

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