【摘要】：近幾十年以來(lái),預(yù)應(yīng)力混凝土橋梁的跨度不斷的增大,新型式的橋梁結(jié)構(gòu)不斷的出現(xiàn),矮塔斜拉橋就是其中之一,它是介于預(yù)應(yīng)力混凝土梁橋和斜拉橋之間的一種橋梁結(jié)構(gòu)形式,這類大跨度橋梁由于是新近出現(xiàn)的,對(duì)于它們?cè)诘卣鹱饔孟碌氖芰ψ冃蔚惹闆r還沒(méi)有充分的認(rèn)識(shí),因此研究矮塔斜拉橋在地震作用下的反應(yīng)是十分必要的。眾所周知,任何結(jié)構(gòu)系統(tǒng)都具有振動(dòng)阻尼,由于阻尼的存在,橋梁結(jié)構(gòu)在振動(dòng)時(shí)會(huì)產(chǎn)生能量的耗散,它對(duì)橋梁結(jié)構(gòu)在地震作用下的反應(yīng)有十分重要的影響,那么研究阻尼對(duì)矮塔斜拉橋地震響應(yīng)的影響同樣也是非常重要的。在進(jìn)行地震響應(yīng)反應(yīng)譜分析時(shí),采用不同的阻尼比橋梁結(jié)構(gòu)的地震響應(yīng)分析結(jié)果會(huì)有所不同,另外,在我國(guó)08抗震設(shè)計(jì)規(guī)范中規(guī)定,對(duì)于混凝土梁式橋而言,阻尼取值一般為0.05,而斜拉橋由于結(jié)構(gòu)偏于柔性,阻尼比取值常為0.03,矮塔斜拉橋受力特點(diǎn)介于梁式橋與斜拉橋之間,其在進(jìn)行地震響應(yīng)分析時(shí),阻尼比的取值應(yīng)有別于傳統(tǒng)的梁式橋和斜拉橋。對(duì)于大跨度矮塔斜拉橋這一類橋梁,運(yùn)用反應(yīng)譜分析方法分析其地震響應(yīng)時(shí),采用CQC振型組合分析并不能保證分析結(jié)果的精準(zhǔn)性,因此反應(yīng)譜分析法不能完全取代時(shí)程分析法;同時(shí),在進(jìn)行時(shí)程分析時(shí),輸入不同的地震波也會(huì)對(duì)計(jì)算結(jié)果產(chǎn)生很大的影響,并且抗震規(guī)范規(guī)定了,時(shí)程分析結(jié)果不能夠反映結(jié)構(gòu)的統(tǒng)計(jì)特性,而只是一個(gè)結(jié)構(gòu)隨機(jī)響應(yīng)的樣本,需要分析多個(gè)樣本的結(jié)構(gòu)進(jìn)行統(tǒng)計(jì),這樣才能得到一個(gè)可靠的分析結(jié)果。鑒于以上原因,在進(jìn)行矮塔斜拉橋地震響應(yīng)分析時(shí),同時(shí)采用兩種方法進(jìn)行分析,將兩種分析方法的分析結(jié)果相互校核,最終得到地震反應(yīng)分析結(jié)果。本文實(shí)際工程背景為宿州新汴河大橋,主要對(duì)其進(jìn)行了下述幾個(gè)方面的研究:(1)查閱與橋梁抗震方面相關(guān)的文獻(xiàn)和資料,總結(jié)橋梁抗震領(lǐng)域的理論知識(shí);(2)使用Midas/Civil2012結(jié)構(gòu)分析軟件,建立橋梁三維模型,分析新汴河矮塔斜拉橋的動(dòng)力特性和振型對(duì)結(jié)構(gòu)的影響;(3)運(yùn)用反應(yīng)譜法對(duì)新汴河矮塔斜拉橋在地震作用下進(jìn)行線彈性地震響應(yīng)分析,并比較不同阻尼比對(duì)反應(yīng)譜分析結(jié)果的影響;(4)運(yùn)用時(shí)程分析法對(duì)新汴河矮塔斜拉橋進(jìn)行地震響應(yīng)分析,并比較時(shí)程分析法和反應(yīng)譜分析法的計(jì)算結(jié)果。
[Abstract]:In recent decades, the span of prestressed concrete bridges has been increasing, and new types of bridge structures have been emerging, among which the low tower cable-stayed bridge is one of them. It is a kind of bridge structure form between prestressed concrete beam bridge and cable-stayed bridge. Because this kind of long-span bridge is newly appeared, it has not fully understood their stress and deformation under earthquake. Therefore, it is necessary to study the seismic response of the cable-stayed bridge with low tower. As we all know, any structural system has vibration damping, because of the existence of damping, the energy of bridge structure will be dissipated during vibration, which has a very important effect on the response of bridge structure under earthquake. So it is also very important to study the influence of damping on the seismic response of cable-stayed bridge with low tower. In the seismic response spectrum analysis, the seismic response analysis results of bridge structures with different damping ratios will be different. In addition, in China's 08 seismic design code, for concrete beam bridges, The damping value of cable-stayed bridge is generally 0.05, but the damping ratio of cable-stayed bridge is 0.03 because of the flexibility of the structure. The stress characteristic of the cable-stayed bridge with low tower is between the girder bridge and the cable-stayed bridge. The value of damping ratio should be different from the traditional girder bridge and cable-stayed bridge. For the long-span and low-tower cable-stayed bridge, when the response spectrum analysis method is used to analyze the seismic response, the accuracy of the analysis results can not be guaranteed by using the CQC mode combination analysis, so the response spectrum analysis method can not completely replace the time-history analysis method. At the same time, when the time history analysis is carried out, the input of different seismic waves will also have a great influence on the calculation results, and the seismic code stipulates that the results of the time-history analysis cannot reflect the statistical characteristics of the structure. But it is only a sample of random response of structure, which needs to analyze the structure of multiple samples to make statistics, in order to get a reliable analysis result. In view of the above reasons, in the seismic response analysis of the cable-stayed bridge with low tower, two methods are used to analyze the seismic response. The results of the two methods are checked and the results of the seismic response analysis are finally obtained. The actual engineering background of this paper is the Xinbianhe Bridge in Suzhou, which is mainly studied in the following aspects: (1) consulting the literature and materials related to the earthquake resistance of the bridge, summarizing the theoretical knowledge of the seismic field of the bridge, (2) using the Midas/Civil2012 structural analysis software, A three-dimensional model of the bridge is established to analyze the dynamic characteristics of the cable-stayed bridge with low tower in Xinbianhe River and the influence of the vibration pattern on the structure. (3) the linear elastic seismic response analysis of the cable-stayed bridge with low tower in Xinbianhe River under earthquake is carried out by using the response spectrum method. The effects of different damping ratios on the response spectrum analysis results are compared. (4) the seismic response analysis of the cable-stayed bridge with low tower in Xinbianhe River is carried out by using time-history analysis, and the calculated results of time-history analysis and response spectrum analysis are compared.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U442.55;U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 艾慶華;王東升;李宏男;孫治國(guó);;基于塑性鉸模型的鋼筋混凝土橋墩地震損傷評(píng)價(jià)[J];工程力學(xué);2009年04期

2 李承銘;李志山;王國(guó)儉;;混凝土梁柱構(gòu)件基于截面纖維模型的彈塑性分析[J];建筑結(jié)構(gòu);2007年12期

3 陳從春;肖汝誠(chéng);;用索梁活載比界定矮塔斜拉橋的方法[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年06期

4 藺鵬臻;劉鳳奎;周世軍;劉世忠;;部分斜拉橋的力學(xué)性能及其界定[J];鐵道學(xué)報(bào);2007年02期

5 陳從春;周海智;肖汝誠(chéng);;矮塔斜拉橋研究的新進(jìn)展[J];世界橋梁;2006年01期

6 秦順全;蕪湖長(zhǎng)江大橋板桁組合結(jié)構(gòu)斜拉橋建造技術(shù)[J];土木工程學(xué)報(bào);2005年09期

7 張強(qiáng),衛(wèi)軍,文武松;世界首座雙層交通預(yù)應(yīng)力斜拉橋—澳凼三橋[J];橋梁建設(shè);2004年02期

8 金增洪;矮塔斜拉橋的設(shè)計(jì)與施工——日本新東明高速公路上的京川橋[J];中外公路;2004年01期

9 張多平,康煒;蘭州市小西湖黃河大橋設(shè)計(jì)分析[J];蘭州鐵道學(xué)院學(xué)報(bào);2002年06期

10 肖曉春,林皋,遲世春;樁-土-結(jié)構(gòu)動(dòng)力相互作用的分析模型與方法[J];世界地震工程;2002年04期

相關(guān)博士學(xué)位論文 前1條

1 劉哲鋒;地震能量反應(yīng)分析方法及其在高層混合結(jié)構(gòu)抗震評(píng)估中的應(yīng)用[D];湖南大學(xué);2006年

相關(guān)碩士學(xué)位論文 前9條

1 張鈞才;矮塔斜拉橋施工關(guān)鍵技術(shù)研究[D];華南理工大學(xué);2012年

2 芮偉國(guó);雙菱塔斜拉橋地震反應(yīng)與推倒分析研究[D];長(zhǎng)沙理工大學(xué);2010年

3 劉瑞山;大跨度斜拉橋地震反應(yīng)分析[D];長(zhǎng)沙理工大學(xué);2009年

4 李逢寶;上承式肋拱橋抗震性能分析與研究[D];重慶交通大學(xué);2009年

5 李黎;雙幅聯(lián)體獨(dú)塔預(yù)應(yīng)力混凝土斜拉橋地震反應(yīng)分析[D];同濟(jì)大學(xué);2007年

6 王天亮;大跨度斜拉橋地震反應(yīng)分析及減震技術(shù)研究[D];同濟(jì)大學(xué);2007年

7 何晗欣;能力譜方法在連續(xù)剛構(gòu)橋抗震分析中的應(yīng)用研究[D];長(zhǎng)安大學(xué);2006年

8 劉文浩;大跨度連續(xù)剛構(gòu)橋的彈塑性地震反應(yīng)分析[D];長(zhǎng)沙理工大學(xué);2008年

9 韓金亮;結(jié)構(gòu)抗震分析中側(cè)向荷載分布模式的研究[D];中國(guó)農(nóng)業(yè)大學(xué);2005年

，

本文編號(hào)：2156281