【摘要】：摘要： 建于大風(fēng)區(qū)的鐵路橋梁受到風(fēng)荷載的作用會(huì)受到很大的激振,對(duì)其進(jìn)行研究是保證結(jié)構(gòu)安全及橋上車(chē)輛運(yùn)行安全的重要前提。本文以蘭新第二雙線(xiàn)鐵路為工程背景,對(duì)風(fēng)區(qū)橋梁的紊流風(fēng)速場(chǎng)進(jìn)行了數(shù)值模擬,并計(jì)算了橋梁的風(fēng)振響應(yīng)。全文的主要內(nèi)容及成果如下： (1)對(duì)國(guó)內(nèi)外橋梁的風(fēng)振破壞進(jìn)行了回顧,闡明了橋梁風(fēng)致振動(dòng)原理,介紹了研究強(qiáng)風(fēng)作用下橋梁動(dòng)力響應(yīng)的重要性。并以蘭新線(xiàn)為工程背景,重點(diǎn)介紹了蘭新線(xiàn)所受風(fēng)災(zāi)情況。 (2)基于隨機(jī)過(guò)程分析理論,介紹了兩種紊流風(fēng)速場(chǎng)的數(shù)值模擬方法：線(xiàn)性濾波法和諧波合成法。 (3)基于蘭新第二雙線(xiàn)鐵路風(fēng)區(qū)跨度32m簡(jiǎn)支箱梁和16m簡(jiǎn)支槽型梁的設(shè)計(jì),對(duì)其進(jìn)行有限元建模,分析了結(jié)構(gòu)的自振特性。 (4)采用諧波合成法對(duì)橋址處的紊流風(fēng)速場(chǎng)進(jìn)行數(shù)值模擬,根據(jù)風(fēng)洞試驗(yàn)得到的三分力系數(shù)結(jié)果,生成橋梁各節(jié)點(diǎn)的靜風(fēng)力和抖振風(fēng)力。 (5)多工況計(jì)算分析了風(fēng)荷載作用下橋梁的動(dòng)力響應(yīng),得到了一些有意義的結(jié)論。
[Abstract]:Abstract: the railway bridge built in the windy area will be greatly excited by wind load, so the research on it is an important prerequisite to ensure the safety of the structure and the running safety of the vehicle on the bridge. In this paper, the turbulent wind velocity field of the bridge in the wind region is numerically simulated and the wind-induced vibration response of the bridge is calculated based on the engineering background of the second double-track railway in Lanxin. The main contents and achievements of this paper are as follows: (1) the wind-induced vibration of bridges at home and abroad is reviewed, the principle of wind-induced vibration of bridges is expounded, and the importance of studying the dynamic response of bridges under strong wind is introduced. Taking Lanxin Line as the engineering background, the wind disaster situation of Lanxin Line is introduced emphatically. (2) based on the theory of stochastic process analysis, two numerical simulation methods of turbulent wind velocity field are introduced: linear filtering method and harmonic synthesis method. (3) based on the design of 32m simply supported box girder and 16m simply supported slot beam in the wind zone of Lanxin second double-track railway, the finite element modeling is carried out and the natural vibration characteristics of the structure are analyzed. (4) numerical simulation of turbulent wind velocity field at bridge site is carried out by harmonic synthesis method. According to the results of wind tunnel test, static and chattering wind forces of each node of bridge are generated. (5) the dynamic response of the bridge under wind load is calculated and analyzed under multi-conditions, and some meaningful conclusions are obtained.
【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(lèi)號(hào)】：U441.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王修瓊,賀國(guó)京;工程中隨機(jī)過(guò)程的數(shù)值模擬方法及其評(píng)述[J];四川建筑科學(xué)研究;2005年01期

2 楊斌;李永樂(lè);何向東;;蘭新鐵路第二雙線(xiàn)新疆段施工過(guò)程防風(fēng)技術(shù)[J];四川建筑科學(xué)研究;2012年01期

3 張希黔;葛勇;嚴(yán)春風(fēng);晏致濤;;脈動(dòng)風(fēng)場(chǎng)模擬技術(shù)的研究與進(jìn)展[J];地震工程與工程振動(dòng);2008年06期

4 陳政清;劉光棟;;橋梁風(fēng)工程研究的若干新進(jìn)展[J];工程力學(xué);2006年S2期

5 羅俊杰;韓大建;;大跨度結(jié)構(gòu)隨機(jī)脈動(dòng)風(fēng)場(chǎng)的快速模擬方法[J];工程力學(xué);2008年03期

6 周穎,禹奇才,曹映泓;大跨度橋梁非線(xiàn)性靜力抗風(fēng)研究[J];廣州大學(xué)學(xué)報(bào)(自然科學(xué)版);2002年04期

7 袁波;應(yīng)惠清;徐佳煒;;基于線(xiàn)性濾波法的脈動(dòng)風(fēng)速模擬及其MATLAB程序的實(shí)現(xiàn)[J];結(jié)構(gòu)工程師;2007年04期

8 王之宏;風(fēng)荷載的模擬研究[J];建筑結(jié)構(gòu)學(xué)報(bào);1994年01期

9 張興杰;;預(yù)應(yīng)力混凝土槽形梁應(yīng)用及研究綜述[J];山西建筑;2006年06期

10 李曙光;蘆杰;;淺談結(jié)構(gòu)風(fēng)工程與大跨度橋梁抗風(fēng)設(shè)計(jì)[J];山西建筑;2007年13期

相關(guān)博士學(xué)位論文 前1條

1 王少欽;風(fēng)及列車(chē)荷載作用下大跨度橋梁振動(dòng)響應(yīng)研究[D];北京交通大學(xué);2012年

，

本文編號(hào)：2456668