本文選題：下承式 + 三鉸鋼拱橋��； 參考：《長安大學(xué)》2014年碩士論文

【摘要】：隨著我國橋梁建設(shè)水平的迅速發(fā)展，鋼拱橋的應(yīng)用越來越廣泛。下承式剛性吊桿三鉸鋼拱橋因制造簡單，施工方便等優(yōu)點而被應(yīng)用于橋梁建設(shè)中。本文主要研究了該類橋梁的靜力性能、空間穩(wěn)定性以及剛性吊桿的疲勞問題。主要完成了以下工作： 首先以寧波市靈橋為研究對象，通過有限元計算分析，系統(tǒng)地研究了矢跨比、拱肋剛度、拱肋內(nèi)傾角、吊桿剛度和邊界條件對結(jié)構(gòu)受力的影響；總結(jié)各設(shè)計參數(shù)對結(jié)構(gòu)受力的影響規(guī)律，綜合考慮結(jié)構(gòu)受力、施工、造價等因素，提出該類橋梁的合理結(jié)構(gòu)形式，即矢跨比1/5~1/7，平行拱，，豎直吊桿，拱肋剛度不宜過大，吊桿剛度不宜過小；靈橋結(jié)構(gòu)靜力分析結(jié)果滿足規(guī)范要求，進(jìn)一步驗證了該類橋梁結(jié)構(gòu)形式的合理性。 然后研究了下承式剛性吊桿三鉸鋼拱橋的結(jié)構(gòu)穩(wěn)定性，以寧波市靈橋為研究對象，通過有限元計算分析，研究了矢跨比、拱肋剛度、拱肋內(nèi)傾角、吊桿剛度、橫向聯(lián)結(jié)系對結(jié)構(gòu)空間穩(wěn)定性的影響；給出了改善其穩(wěn)定性的一些建議，即矢跨比不宜太小，增大拱肋剛度可以在一定程度上改善結(jié)構(gòu)穩(wěn)定性，但拱肋剛度也不宜太大，可以通過增大吊桿和橫向連結(jié)系剛度，或者布置較多的拱肋橫向連結(jié)系來提高拱肋的橫向穩(wěn)定性。 最后研究了剛性吊桿的疲勞問題，論述了老齡鉚接鋼橋的傳統(tǒng)疲勞壽命評估方法；基于傳統(tǒng)疲勞壽命評估方法，通過有限元軟件對靈橋鉚接鋼吊桿進(jìn)行了疲勞分析，計算了靈橋鉚接鋼吊桿的剩余疲勞壽命，并給出了一個抗疲勞設(shè)計建議。
[Abstract]:With the rapid development of bridge construction in China, steel arch bridge is more and more widely used. The through rigid suspension steel arch bridge is used in bridge construction because of its simple manufacture and convenient construction. In this paper, the static performance, spatial stability and fatigue of rigid suspenders are studied. The following tasks have been completed: Firstly, the effects of rise-span ratio, arch rib stiffness, inclination angle of arch rib, suspender stiffness and boundary condition on the stress of the structure are systematically studied by finite element analysis. This paper summarizes the influence of design parameters on the structure stress, synthetically considers the structural force, construction, cost and other factors, and puts forward the reasonable structural form of this kind of bridge, that is, 1 / 5 / 5 / 1 / 7 of rise-span ratio, parallel arch, vertical suspender, and arch stiffness should not be too large. The stiffness of suspension rod should not be too small, and the static analysis results of Lingqiao structure meet the requirements of the code, which further verifies the rationality of this kind of bridge structure. Then, the structural stability of the through rigid suspension three hinged steel arch bridge is studied. Taking Ningbo Lingqiao as the research object, the ratio of rise-span, the stiffness of arch rib, the inclination angle of arch rib and the stiffness of suspender are studied by finite element analysis. Some suggestions for improving the stability of the structure are given, that is, the rise-span ratio should not be too small, the stability of the structure can be improved to a certain extent by increasing the stiffness of the arch rib, but the stiffness of the arch rib should not be too large. The lateral stability of the arch rib can be improved by increasing the stiffness of the suspender and the transverse connection, or arranging more transverse connection of the arch rib. Finally, the fatigue problem of rigid suspension rod is studied, and the traditional fatigue life evaluation method of riveted steel bridge is discussed, based on the traditional fatigue life evaluation method, the fatigue analysis of riveted steel suspender of Lingqiao is carried out by finite element software. The residual fatigue life of riveted steel suspenders of Lingqiao is calculated, and a suggestion of anti-fatigue design is given.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U448.22;U441

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 彭立志;李德欽;劉煒;李友清;宋滿忠;;佛山東平大橋豎轉(zhuǎn)施工工藝的設(shè)計特色[J];公路;2006年03期

2 陳寶春;陳康明;趙秋;;中國鋼拱橋發(fā)展現(xiàn)狀調(diào)查與分析[J];中外公路;2011年02期

3 趙建平,黃文龍,朱薇;用等效載荷方法估算變幅載荷下的疲勞壽命[J];機械強度;1997年03期

4 岳峰;任曉崧;趙金城;溫學(xué)鈞;郝志剛;;公路鋼橋疲勞車輛荷載研究進(jìn)展[J];建筑鋼結(jié)構(gòu)進(jìn)展;2009年02期

5 許云生;;沈哈客專新開河138m鋼箱疊拱橋設(shè)計[J];山西建筑;2007年20期

6 劉彥明;;大跨度鋼箱疊拱橋?qū)嶓w圓鋼吊桿疲勞試驗研究[J];蘭州交通大學(xué)學(xué)報;2010年03期

7 趙金鋼;占玉林;趙人達(dá);邵俊虎;;高速鐵路橋梁實體圓鋼吊桿疲勞性能和承載能力試驗研究[J];建筑結(jié)構(gòu);2013年10期

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