本文選題：大跨度斜拉橋　切入點(diǎn)：動(dòng)力特性　出處：《北京交通大學(xué)》2014年碩士論文

【摘要】：摘要：隨著我國(guó)經(jīng)濟(jì)的快速發(fā)展,道路交通事業(yè)作為基礎(chǔ)設(shè)施中最關(guān)鍵的部分正蓬勃發(fā)展,而大跨度橋梁通常是道路交通中的樞紐工程。大跨度斜拉橋由于構(gòu)造新穎、跨越能力大,成為橋梁領(lǐng)域的主角之一。大跨度斜拉橋具有獨(dú)特的靜、動(dòng)力性能,對(duì)大跨度斜拉橋進(jìn)行地震響應(yīng)進(jìn)行分析研究,能夠有效保證其在強(qiáng)震作用下的安全。本文首先介紹國(guó)內(nèi)外大跨度橋梁發(fā)展現(xiàn)狀及常用的抗震分析方法,再以大跨度斜拉橋蘇通長(zhǎng)江公路大橋?yàn)楣こ瘫尘?用有限單元法,建立該橋的空間動(dòng)力模型,對(duì)其自身動(dòng)力特性及在地震作用下的響應(yīng)進(jìn)行深入分析,主要研究如下： (1)首先介紹了大跨度斜拉橋的結(jié)構(gòu)特點(diǎn)及國(guó)內(nèi)外斜拉橋的發(fā)展?fàn)顩r,并闡述對(duì)其抗震反應(yīng)分析的必要性；并對(duì)大跨斜拉橋地震分析中現(xiàn)存的一些問(wèn)題進(jìn)行探討。 (2)歸納總結(jié)了現(xiàn)有斜拉橋地震響應(yīng)分析方法,詳細(xì)介紹了反應(yīng)譜法、時(shí)程分析法的基本原理,以及相應(yīng)的計(jì)算公式。 (3)以有限元軟件MIDAS/CIVIL為計(jì)算平臺(tái),建立蘇通長(zhǎng)江公路大橋的空間動(dòng)力模型,分別對(duì)是否設(shè)置減震耗能裝置兩種情況,進(jìn)行動(dòng)力特性分析,并對(duì)計(jì)算結(jié)果進(jìn)行比較分析,闡明減震耗能裝置對(duì)結(jié)構(gòu)動(dòng)力特性的影響及重要性。 (4)通過(guò)計(jì)算橋梁的有效振型參與質(zhì)量,確定參與振型分解反應(yīng)譜法模態(tài)階數(shù)的數(shù)量,同時(shí)根據(jù)大橋所處的場(chǎng)地條件確定采用的反應(yīng)譜,對(duì)橋梁進(jìn)行五種工況下的地震響應(yīng)進(jìn)行分析。 (5)結(jié)合大橋所處的場(chǎng)地條件,選取合適的地震波。在一致地震激勵(lì)下進(jìn)行大橋的地震響應(yīng)時(shí)程分析,重點(diǎn)分析了豎向地震激勵(lì)對(duì)地震響應(yīng)的影響。 (6)探討非一致地震激勵(lì)下的行波效應(yīng)對(duì)橋梁結(jié)構(gòu)地震響應(yīng)的影響,得到關(guān)鍵截面在不同波速激勵(lì)下結(jié)構(gòu)的地震響應(yīng),并與一致地震激勵(lì)下大橋的地震響應(yīng)結(jié)果比較,分析得到相應(yīng)結(jié)論,闡述行波效應(yīng)的重要性。
[Abstract]:Absrtact: with the rapid development of our country's economy, the road traffic industry as the most important part of the infrastructure is booming, and the long-span bridge is usually the key project in the road traffic.Long-span cable-stayed bridge has become one of the leading roles in bridge field because of its novel structure and large span capacity.The long-span cable-stayed bridge has unique static and dynamic performance. The seismic response of long-span cable-stayed bridge is analyzed and studied, which can effectively ensure its safety under strong earthquake.This paper first introduces the development situation of long-span bridges at home and abroad and the commonly used seismic analysis methods, and then, taking the Sutong Yangtze River Highway Bridge, a long-span cable-stayed bridge, as the engineering background, establishes the spatial dynamic model of the bridge by using the finite element method.The dynamic characteristics and the response under earthquake are analyzed. The main results are as follows:Firstly, the structural characteristics of long-span cable-stayed bridges and the development of cable-stayed bridges at home and abroad are introduced, and the necessity of seismic response analysis of long-span cable-stayed bridges is expounded, and some existing problems in seismic analysis of long-span cable-stayed bridges are discussed.(2) the existing seismic response analysis methods of cable-stayed bridges are summarized, and the basic principles of response spectrum method, time-history analysis method and corresponding calculation formulas are introduced in detail.Based on the finite element software MIDAS/CIVIL, the spatial dynamic model of Sutong Yangtze River Highway Bridge is established. The dynamic characteristics of the two cases are analyzed, and the calculation results are compared and analyzed.The influence and importance of the energy dissipation device on the dynamic characteristics of the structure are expounded.(4) by calculating the participating quality of the effective modes of the bridge, determining the number of the modal order of the mode decomposition response spectrum method, at the same time determining the response spectrum according to the site condition of the bridge.The seismic response of the bridge under five working conditions is analyzed.Combined with the site conditions of the bridge, the appropriate seismic waves are selected.The seismic response time history analysis of the bridge under uniform earthquake excitation is carried out, and the influence of vertical earthquake excitation on the seismic response is emphatically analyzed.The influence of traveling wave effect on the seismic response of bridge structure under non-uniform earthquake excitation is discussed. The seismic response of the key section under different wave velocity excitation is obtained and compared with the seismic response result of the bridge under uniform earthquake excitation.The conclusion is obtained and the importance of traveling wave effect is expounded.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.27;U442.55

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 徐永勝;;某三塔斜拉橋動(dòng)力特性分析[J];城市道橋與防洪;2009年05期

2 李忠獻(xiàn),史志利;行波激勵(lì)下大跨度連續(xù)剛構(gòu)橋的地震反應(yīng)分析[J];地震工程與工程振動(dòng);2003年02期

3 史志利,李忠獻(xiàn);隨機(jī)地震動(dòng)場(chǎng)多點(diǎn)激勵(lì)下大跨度橋梁地震反應(yīng)分析方法[J];地震工程與工程振動(dòng);2003年04期

4 鐘萬(wàn)勰;;結(jié)構(gòu)動(dòng)力方程的精細(xì)時(shí)程積分法[J];大連理工大學(xué)學(xué)報(bào);1994年02期

5 鐘萬(wàn)勰,林家浩,吳志剛,孫東科,張亞輝;大跨度橋梁分析方法的一些進(jìn)展[J];大連理工大學(xué)學(xué)報(bào);2000年02期

6 孫廣俊;李愛(ài)群;;關(guān)于結(jié)構(gòu)振型參與系數(shù)和振型貢獻(xiàn)的分析[J];防災(zāi)減災(zāi)工程學(xué)報(bào);2009年05期

7 徐艷;George C Lee;范立礎(chǔ);胡世德;;Acomparative study between China and U.S.on seismic design philosophy and practice of a long span arch bridge[J];Earthquake Engineering and Engineering Vibration;2006年01期

8 徐艷;George C Lee;;Traveling wave effect on the seismic response of a steel arch bridge subjected to near fault ground motions[J];Earthquake Engineering and Engineering Vibration;2007年03期

9 孫景江;江近仁;;與規(guī)范反應(yīng)譜相對(duì)應(yīng)的金井清譜的譜參數(shù)[J];世界地震工程;1990年01期

10 潘旦光,樓夢(mèng)麟,范立礎(chǔ);多點(diǎn)輸入下大跨度結(jié)構(gòu)地震反應(yīng)分析研究現(xiàn)狀[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2001年10期

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