本文選題：地震 + 高速鐵路��； 參考：《中國(guó)鐵道科學(xué)研究院》2014年碩士論文

【摘要】：高速鐵路對(duì)社會(huì)經(jīng)濟(jì)的發(fā)展起著非常重要的作用。為了滿足高速鐵路對(duì)線路的要求，橋梁結(jié)構(gòu)在高速鐵路中的比重不斷增加。中國(guó)是一個(gè)地震災(zāi)害嚴(yán)重的國(guó)家，多條高速鐵路穿越地震帶。因此，線—橋結(jié)構(gòu)的抗震性能日益受到關(guān)注。本文在借鑒國(guó)內(nèi)外現(xiàn)有研究成果的基礎(chǔ)上，針對(duì)高速鐵路典型的無(wú)砟軌道橋梁，考慮行波效應(yīng)的作用，建立了絕對(duì)坐標(biāo)系下線—橋地震響應(yīng)動(dòng)力平衡方程，編制了相應(yīng)的分析程序TBDAUE。并以常用的多跨簡(jiǎn)支梁橋?yàn)檠芯繉?duì)象，系統(tǒng)分析了一致地震動(dòng)和非一致振動(dòng)地震動(dòng)作用下線—橋結(jié)構(gòu)動(dòng)力性能。本文的主要研究成果如下： 1.三向一致振動(dòng)地震波作用下，由于縱向地震波的作用使得墩頂發(fā)生轉(zhuǎn)角位移，從而使得簡(jiǎn)支梁梁縫鄰近區(qū)域的鋼軌在垂向發(fā)生錯(cuò)位。而鋼軌的橫向位移則以平移為主，其橫向變形較小。因此在進(jìn)行線—橋結(jié)構(gòu)的地震響應(yīng)研究時(shí)，縱向地震波的影響很大。 2.在不同剪切波速的地震波作用下，各跨的梁及上部的軌道結(jié)構(gòu)的地震響應(yīng)除了相位差之外沒有顯著差異。 3.在由于行波效應(yīng)引起的非一致地震波作用下，橋梁結(jié)構(gòu)和軌道結(jié)構(gòu)的橫向變形主要由地面位移時(shí)程的相位差所引起，，垂向變形則主要由地面位移時(shí)程的相位差和墩頂轉(zhuǎn)角位移共同引起。 4.考慮行波效應(yīng)后，地震作用下不同墩高對(duì)橋梁結(jié)構(gòu)和軌道結(jié)構(gòu)的橫向變形的影響很小，但對(duì)垂向變形的影響較大。
[Abstract]:High-speed railway plays a very important role in the development of social economy. In order to meet the requirements of high-speed railway, the proportion of bridge structure in high-speed railway is increasing. China is a country with severe earthquake disasters. Many high-speed railways cross the seismic belt. Therefore, the seismic performance of line-bridge structures has been paid more and more attention. Based on the existing research results at home and abroad and considering the effect of traveling wave on the typical ballastless track bridge of high-speed railway, the dynamic equilibrium equation of seismic response of line-bridge in absolute coordinate system is established in this paper. The corresponding analysis program TBDAUE. Taking the commonly used multi-span simply supported beam bridge as the research object, the dynamic performance of the line-bridge structure under the action of uniform and non-uniform vibration ground motion is systematically analyzed. The main research results of this paper are as follows: 1. Under the action of the seismic wave of three direction consistent vibration, because of the action of longitudinal seismic wave, the corner displacement of the pier top occurs, which makes the rail in the adjacent area of the joint of the simply supported beam dislocate in the vertical direction. On the other hand, the lateral displacement of rail is mainly translation, and its transverse deformation is small. Therefore, longitudinal seismic waves have a great influence on the seismic response of linear bridge structures. 2. Under the action of seismic wave with different shear wave velocities, there is no significant difference in seismic response of beam and upper track structure except phase difference. 3. Under the action of non-uniform seismic wave caused by traveling wave effect, the transverse deformation of bridge structure and track structure is mainly caused by the phase difference of ground displacement time history. The vertical deformation is mainly caused by the phase difference of the time history of the ground displacement and the angular displacement of the top of the pier. 4. After considering the traveling wave effect, different pier heights have little effect on the transverse deformation of bridge structure and track structure, but have great influence on vertical deformation.
【學(xué)位授予單位】：中國(guó)鐵道科學(xué)研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.55;U211.3

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本文編號(hào)：1781937