【摘要】：近年來(lái)，世界上發(fā)生了多次地震，不僅讓人們意識(shí)地震的破壞性和災(zāi)難性，也讓學(xué)者開(kāi)始更深入的研究有關(guān)橋梁在地震作用下的破壞機(jī)理，更深入的研究橋梁結(jié)構(gòu)的抗震理論，為提出更好的抗震理論設(shè)計(jì)方法而奮斗。隨著我國(guó)經(jīng)濟(jì)的高速發(fā)展，，橋梁的跨徑也在不斷的增大，而且橋梁型式也在不斷的創(chuàng)新，研究橋梁在地震作用下的破壞原理，提高橋梁抗震能力，對(duì)于保證橋梁在強(qiáng)震作用下的安全性具有重要的工程意義。為了研究樁土相互作用對(duì)預(yù)應(yīng)力混凝土連續(xù)梁橋在地震作用下的響應(yīng)值的影響，本文主要對(duì)以下幾個(gè)內(nèi)容做了簡(jiǎn)單的研究： （1）簡(jiǎn)述了大跨徑橋梁抗震設(shè)計(jì)以及樁土相互作用的研究現(xiàn)狀，對(duì)橋梁抗震分析方法做了簡(jiǎn)單的介紹，對(duì)比分析了各方法的優(yōu)缺點(diǎn)。 （2）以江西客家大橋?yàn)楣こ瘫尘埃肕idas Civil2012有限元軟件分別建立了不考慮樁土相互作用有限元模型I和考慮樁土相互作用的有限元模型II。 （3）通過(guò)計(jì)算有效振型參與質(zhì)量，確定合理的振型分解反應(yīng)譜法模態(tài)階數(shù),根據(jù)大橋所處的場(chǎng)地條件確定其設(shè)計(jì)反應(yīng)譜，對(duì)兩個(gè)有限元模型I、II分別進(jìn)行了四種工況下的地震反應(yīng)譜分析。 （4）結(jié)合場(chǎng)地條件，選擇EI-Centro波作為地震動(dòng)的輸入，對(duì)兩個(gè)有限元模型I和II進(jìn)行了一致激勵(lì)下的地震響應(yīng)時(shí)程分析。 （5）分別對(duì)客家大橋反應(yīng)譜法和時(shí)程分析法得到的內(nèi)力和位移響應(yīng)值進(jìn)行對(duì)比分析，得出了相關(guān)結(jié)論，為以后類似橋梁的抗震分析和和設(shè)計(jì)提供參考。
[Abstract]:In recent years, there have been many earthquakes in the world, which not only make people realize the destructive and catastrophic earthquake, but also make scholars study more deeply the damage mechanism of bridges under earthquake and the seismic theory of bridge structures. In order to put forward a better seismic theory design method. With the rapid development of our country's economy, the span of the bridge is also increasing, and the bridge type is constantly innovating, studying the damage principle of the bridge under the action of earthquake, and improving the seismic capacity of the bridge. It is of great engineering significance to ensure the safety of bridge under strong earthquake. In order to study the effect of pile-soil interaction on the response value of prestressed concrete continuous beam bridge under earthquake, The main contents of this paper are as follows: (1) the present situation of seismic design and pile-soil interaction of long-span bridges is briefly described, and the seismic analysis method of bridges is introduced briefly. The advantages and disadvantages of each method are compared and analyzed. (2) taking Jiangxi Hakka Bridge as the engineering background, The finite element model I without considering pile-soil interaction and the finite element model II. (3) with consideration of pile-soil interaction are established by using Midas Civil2012 finite element software. The rational modal order of the mode decomposition response spectrum method is determined, and the design response spectrum of the bridge is determined according to the site conditions of the bridge. The seismic response spectra of the two finite element models IHII are analyzed under four different working conditions. (4) combined with the site conditions, the EI-Centro wave is selected as the input of the ground motion. The seismic response time history analysis of two finite element models I and II is carried out under uniform excitation. (5) the response values of internal force and displacement obtained by the response spectrum method and time history analysis method of Hakka Bridge are compared and analyzed respectively, and the relevant conclusions are obtained. It provides reference for seismic analysis and design of similar bridges in the future.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.55

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