本文選題：振動臺試驗(yàn)　切入點(diǎn)：曲線橋　出處：《西安建筑科技大學(xué)》2014年碩士論文

【摘要】：城市曲線高架橋，結(jié)構(gòu)線性型順暢，可以更好的解決橋梁之間以及橋梁交通與地面交通之間的相互連接問題，從而起到解決或緩和交通困難的問題。近年來由于地震發(fā)生頻繁，城市高架橋是人們高度依賴的生命線工程，發(fā)生地震時一旦受到破壞，將會產(chǎn)生巨大的損失。因此對高架橋的抗震研究有著重要的意義，尤其是曲線高架橋比較復(fù)雜，目前對曲線橋的研究理論比較缺乏，有待于更進(jìn)一步的深入研究。 本文分析了當(dāng)前曲線高架橋研究的背景及意義，探討了橋梁結(jié)構(gòu)地震破壞的主要形式，包括橋梁上部結(jié)構(gòu)、橋梁支座及下部結(jié)構(gòu)等具體破壞形式。討論了現(xiàn)行橋梁抗震設(shè)防標(biāo)準(zhǔn)、曲線橋的結(jié)構(gòu)功能特點(diǎn)、國內(nèi)外曲線橋梁抗震的研究現(xiàn)狀以及橋梁抗震設(shè)計(jì)方法。 結(jié)合國家自然科學(xué)基金項(xiàng)目，設(shè)計(jì)制作了曲線高架橋?qū)嶓w模型,進(jìn)行了地震模擬振動臺試驗(yàn)分析。具體闡述了振動臺試驗(yàn)前期準(zhǔn)備及試驗(yàn)相關(guān)過程，包括模型制作、拾振器及應(yīng)變片布置等，并對試驗(yàn)數(shù)據(jù)進(jìn)行分析處理，研究分析曲線結(jié)構(gòu)橋的動力特性和抗震性能。 本文利用大型有限元軟件MIDAS FEA建立實(shí)體單元計(jì)算模型，利用時程分析法對“C”形曲線高架橋計(jì)算模型進(jìn)行分析，討論了模型在不同地震動輸入下的地震反應(yīng)，并與振動臺試驗(yàn)?zāi)Ｐ瓦M(jìn)行比較，驗(yàn)證了實(shí)體模型與有限元模型模擬的準(zhǔn)確性。 對“人”字形曲線高架橋分別采用反應(yīng)譜法和時程分析法兩種方法分析，討論其地震反應(yīng)規(guī)律，并對兩種方法得出的結(jié)果進(jìn)行比較，，可作為振動臺試驗(yàn)前的仿真分析參考。 通過對“人”字形曲線高架橋進(jìn)行不同角度地震動輸入，比較分析了變截面異型梁、直線梁及曲線梁不同形式梁的抗震性能，探討了“人”字形曲線高架橋最不利地震動反應(yīng)。
[Abstract]:The urban curved viaduct has a smooth linear structure, which can solve the problem of the connection between the bridges and the bridge traffic and the ground traffic, so as to solve or ease the problem of traffic difficulties.Due to frequent earthquakes in recent years, urban viaducts are highly dependent lifeline projects, once the earthquake is damaged, it will cause huge losses.Therefore, the seismic research of viaduct is of great significance, especially the curved viaduct is more complicated.In this paper, the background and significance of the current research on curved viaduct are analyzed, and the main forms of seismic damage of bridge structure are discussed, including the concrete failure forms of bridge superstructure, bridge support and substructure, etc.The current seismic fortification standards of bridges, the structural features of curved bridges, the current research situation of seismic resistance of curved bridges at home and abroad and the seismic design methods of bridges are discussed.The solid model of the curved viaduct is designed and manufactured with the project of National Natural Science Foundation of China, and the shaking table test analysis of seismic simulation is carried out.The preparation of shaking table test and the related process of test, including model making, vibration pick-up and strain gauge arrangement, are described in detail. The test data are analyzed and processed, and the dynamic characteristics and seismic performance of curved structural bridge are studied and analyzed.In this paper, the calculation model of solid element is established by using the finite element software MIDAS FEA, and the calculation model of "C" curve viaduct is analyzed by time history analysis, and the seismic response of the model under different ground motion input is discussed.Compared with the shaking table test model, the accuracy of the solid model and the finite element model is verified.The response spectrum method and time history analysis method are used to analyze the viaduct of the "man" zigzag curve respectively. The seismic response law of the viaduct is discussed, and the results obtained by the two methods are compared, which can be used as a reference for the simulation analysis before shaking table test.Through the input of ground motion at different angles to the "man" curved viaduct, the seismic behavior of the different types of beams with variable cross-section, linear beam and curved beam is compared and analyzed, and the most unfavorable ground motion response of the "man" curve viaduct is discussed.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U442.55

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