本文關(guān)鍵詞：梁間鏈桿對(duì)斜拉橋結(jié)構(gòu)行為的影響分析　出處：《西南交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 斜拉橋 人行橋 鏈桿 荷載試驗(yàn) 敏感頻率

【摘要】：我國交通基礎(chǔ)建設(shè)迅猛發(fā)展,城市橋梁的發(fā)展也越來越快,而且更加重視美觀和行人的通行能力。斜拉橋這種橋型作為一種大跨徑結(jié)構(gòu)和城市地標(biāo)性建筑得到了廣泛應(yīng)用,其使用性和安全性受到格外重視,而橋梁荷載試驗(yàn)是一種重要的評(píng)判方法。設(shè)置人行橋和車行橋的雙層橋梁既能滿足通行能力又體現(xiàn)了人文關(guān)懷。鏈桿作為連接雙層斜拉橋中的一種輔助結(jié)構(gòu),在改善結(jié)構(gòu)性能方面發(fā)揮著相當(dāng)重要作用。本文以綿陽一號(hào)橋荷載試驗(yàn)為工程背景,詳細(xì)敘述了斜拉橋和異形斜拉橋的發(fā)展歷史及人行斜拉橋和雙層斜拉橋的發(fā)展概況,簡要介紹了有限元相關(guān)原理,結(jié)合國內(nèi)外目前研究現(xiàn)狀介紹了行人步頻特性,以及人行橋振動(dòng)舒適性評(píng)價(jià)方法和三種比較常用的求解特征值向量的方法,為本文研究提供的理論依據(jù)。本文關(guān)于鏈桿對(duì)橋梁結(jié)構(gòu)行為影響的討論分析所做的主要工作如下：1、利用有限元程序?qū)d陽一號(hào)橋成橋狀態(tài)仿真計(jì)算分析,全面模擬下在成橋狀態(tài)下該橋的受力狀態(tài),為橋梁荷載試驗(yàn)提供理論依據(jù)。2、通過綿陽一號(hào)橋的兩次橋梁荷載試驗(yàn)來評(píng)價(jià)該橋在添加鏈桿前后的使用性和安全性,并對(duì)有無鏈桿的有限元模型進(jìn)行計(jì)算,對(duì)比兩種狀態(tài)下的受力特點(diǎn)。3、改變鏈桿的剛度、數(shù)量、位置等參數(shù)以及橋梁的結(jié)構(gòu)體系,探討對(duì)該橋的人行橋和車行橋在安全性和使用性的影響,以“避開敏感頻率法”討論了鏈桿的有無對(duì)人行橋舒適性的影響,給出了合理的鏈桿布置方式。
[Abstract]:With the rapid development of transportation infrastructure in China, the development of urban bridges is also getting faster and faster. The cable-stayed bridge has been widely used as a kind of long-span structure and urban landmarks, and its usability and safety have been paid more attention to. The bridge load test is an important evaluation method. The double-deck bridge with pedestrian bridge and vehicular bridge can not only meet the traffic capacity but also reflect the humanistic concern. The chain bar is a kind of auxiliary structure in connecting double-deck cable-stayed bridge. It plays an important role in improving the structure performance. This paper takes the load test of Mianyang No.1 Bridge as the engineering background. The development history of cable-stayed bridge and special-shaped cable-stayed bridge and the development of pedestrian cable-stayed bridge and double-deck cable-stayed bridge are described in detail. Combined with the current research situation at home and abroad, this paper introduces pedestrian walking frequency characteristics, pedestrian bridge vibration comfort evaluation methods and three more commonly used methods to solve eigenvalue vectors. The main work of this paper is as follows: 1. The finite element program is used to simulate and analyze the bridge state of Mianyang No.1 bridge. In order to provide theoretical basis for the bridge load test, the load state of the bridge is simulated comprehensively under the condition of the completed bridge. Through two bridge load tests of Mianyang No. 1 Bridge to evaluate the use and safety of the bridge before and after adding the link bar, and to calculate the finite element model with or without the link bar, and to compare the stress characteristics of the two states. 3. By changing the stiffness, quantity, position and the structure system of the bridge, the influence on the safety and serviceability of the footbridge and the vehicular bridge is discussed. In this paper, the influence of chain rod on comfort of footbridge is discussed by "avoiding sensitive frequency method", and a reasonable arrangement of link rod is given.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441;U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 杜瑞明;E.L.Wilson;;一個(gè)修正的Ritz向量直接疊加方法——振型疊加法的理想的替換方法[J];地震工程與工程振動(dòng);1984年02期

2 喻遠(yuǎn)良,楊繼前,廖海峰;曲線斜拉橋的動(dòng)力反應(yīng)[J];國外橋梁;2000年04期

3 汪東;杜柏松;王劍;;單索面雙層斜拉橋施工控制仿真分析[J];中外公路;2012年05期

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本文編號(hào)：1389104