本文關(guān)鍵詞： 防落梁裝置 緩沖材料 相對(duì)位移 動(dòng)力時(shí)程分析　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近幾十年，地震頻繁發(fā)生，對(duì)建筑結(jié)構(gòu)尤其是橋梁結(jié)構(gòu)的破壞極大，因此針對(duì)地震作用下的橋梁采用合理保護(hù)措施就變得十分必要。一般情況下，橋梁結(jié)構(gòu)在地震作用下的破壞形式有：上部結(jié)構(gòu)的震害、支撐連接件的震害、落梁震害、下部結(jié)構(gòu)和基礎(chǔ)震害，其中最為常見的是落梁震害。在地震作用下，防落梁裝置是防止橋梁上部結(jié)構(gòu)落梁破壞的最終保護(hù)措施。本文主要研究的是：結(jié)合國內(nèi)外已有防落梁系統(tǒng)的相關(guān)規(guī)定，選用合適的防落梁裝置，并分析地震作用下防落梁裝置對(duì)橋梁結(jié)構(gòu)地震響應(yīng)的影響。 本文選擇一座非規(guī)則的七跨簡支梁橋，采用不同場地條件下的三條地震波，通過動(dòng)力時(shí)程分析，計(jì)算比較了該橋在不同地震波作用下，，墩梁之間相對(duì)位移、梁與梁相對(duì)位移隨著墩高的變化情況；通過對(duì)橫向擋塊與主梁之間無間隙、有間隙、間隙之間設(shè)置彈性緩沖材料等三種不同情況下的動(dòng)力時(shí)程計(jì)算結(jié)果的比較，得到了橫向擋塊在地震作用下的受力大小，發(fā)現(xiàn)橫向擋塊對(duì)限制墩梁之間的橫向相對(duì)位移有良好的效果，主梁與橫向擋塊之間設(shè)置緩沖材料時(shí)，可以顯著減小擋塊的受力；對(duì)常見的縱向連梁裝置，采用不同剛度的彈簧阻尼單元模擬其在地震時(shí)的作用，通過動(dòng)力時(shí)程分析，計(jì)算比較了設(shè)置連梁裝置后橋梁地震響應(yīng)的變化，得到了不同剛度的連梁裝置在地震作用下的受力特點(diǎn)。 本論文的研究成果將對(duì)防落梁裝置的設(shè)計(jì)、工程應(yīng)用具有一定的參考價(jià)值。
[Abstract]:In recent decades, earthquakes occur frequently, and the damage to the building structure, especially the bridge structure, is great. Therefore, it is very necessary to adopt reasonable protection measures for the bridge under earthquake. The damage forms of bridge structure under earthquake are as follows: the damage of superstructure, the damage of supporting connection, the damage of falling beam, the damage of substructure and foundation, the most common of which is the damage of falling beam. The anti-falling beam device is the ultimate protection measure to prevent the bridge superstructure from falling beam damage. The main research in this paper is: combined with the relevant provisions of the existing anti-falling beam system at home and abroad, select the appropriate anti-falling beam device. The effect of anti-falling beam device on the seismic response of bridge structure is analyzed. In this paper, a non-regular seven-span simply supported beam bridge is selected and three seismic waves under different site conditions are used to calculate and compare the relative displacement between pier and beam under different seismic waves through dynamic time-history analysis. The relative displacement of beam to beam varies with the height of pier; The dynamic time history calculation results under three different conditions, such as no clearance, gap between transverse block and main beam, and elastic buffer material between clearance, are compared. The force size of the transverse block under earthquake action is obtained. It is found that the transverse block has a good effect on limiting the lateral relative displacement between the pier beams and the main beam and the transverse block when the buffer material is set. The force of the block can be significantly reduced; The spring damping element with different stiffness is used to simulate the action of the common longitudinal connecting beam device during the earthquake. The dynamic time history analysis is used to calculate and compare the changes of the bridge seismic response after the installation of the connecting beam device. The stress characteristics of the connecting beam device with different stiffness under earthquake action are obtained. The research results of this paper will have some reference value for the design and engineering application of the anti-falling beam device.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441.3

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