發(fā)布時(shí)間：2018-10-15 06:38

【摘要】：隨著科學(xué)技術(shù)的發(fā)展，生產(chǎn)力水平空前提高，系桿拱橋在中國(guó)得到了極好的發(fā)展。系桿拱橋是一種獨(dú)特形式的拱橋，作為拱橋形式中的一種的他不但具備拱橋的基本特征，而且自身的獨(dú)特性質(zhì)也是非常明顯的�？偟膩�(lái)說(shuō)系桿拱橋是綜合著拱與梁的優(yōu)點(diǎn)的一種特殊橋型，他不僅僅只是將兩種結(jié)構(gòu)簡(jiǎn)單的耦合在一起，而是使得兩種結(jié)構(gòu)共同承擔(dān)荷載與力，充分利用拱受壓、梁受彎的受力特性，并由吊桿承受系桿的重力與荷載并傳遞至拱肋，而系桿對(duì)拱肋的拉力與拱的推力也相互抵消，形成一種超靜定結(jié)構(gòu)。這種拱橋外部為靜定體系，內(nèi)部則為一種超靜定體系，因此對(duì)墩臺(tái)不均勻沉降無(wú)影響。系桿拱橋從結(jié)構(gòu)受力來(lái)說(shuō)可以分為有推力體系和無(wú)推力體系兩種。在系桿拱橋的施工過(guò)程中系桿剛度對(duì)組合體系的影響，系桿里預(yù)應(yīng)力以及系桿本身受力對(duì)拱的影響，一直是一個(gè)值得深入探討的問(wèn)題，因此比較系桿剛度和拱剛度變化確定合理剛度值是非常值得研究的課題。本文以海南省瓊海九曲江大橋工程為背景，，對(duì)大跨徑鋼管混凝土系桿拱橋進(jìn)行研究，主要內(nèi)容如下： ①結(jié)合九曲江大橋工程實(shí)例，通過(guò)對(duì)系桿拱橋模型的建立過(guò)程進(jìn)行了介紹，并對(duì)幾個(gè)關(guān)鍵的邊界條件處理以及施工階段的劃分做了詳細(xì)分析和研究，為今后的系桿拱橋有限元模型建立提供參考。 ②通過(guò)建模計(jì)算模擬不同系桿剛度以及拱剛度下組合體系的受力，并對(duì)系桿、拱剛度進(jìn)行優(yōu)化得出最優(yōu)剛度，研究不同系桿預(yù)應(yīng)力對(duì)組合體系的影響優(yōu)化系桿預(yù)應(yīng)力得出最佳受力狀態(tài)下的預(yù)應(yīng)力值。 ③通過(guò)改變單一變量與放大系數(shù)的方法，研究探討合理的梁、拱剛度比，提出系桿拱橋不同拱梁截面橫向剛度比、豎向剛度比、不同截面參數(shù)、不同材料參數(shù)對(duì)結(jié)構(gòu)動(dòng)力特性的影響，最后通過(guò)計(jì)算比較得出相應(yīng)參數(shù)位移內(nèi)力的最佳范圍。
[Abstract]:With the development of science and technology, the level of productivity has been improved unprecedentedly, and the tied arch bridge has got excellent development in China. Tied arch bridge is a unique form of arch bridge. As one of the arch bridge forms, it not only has the basic characteristics of the arch bridge, but also its own unique properties are very obvious. In general, tied arch bridge is a special type of bridge which combines the advantages of arch and beam. It is not only the simple coupling of the two structures, but also makes the two structures bear the load and force together and make full use of the arch under pressure. The bending behavior of the beam is subjected to the gravity and load of the tie bar and transferred to the arch rib, and the tension of the tie bar to the arch rib and the thrust of the arch are offset each other to form a statically indeterminate structure. This kind of arch bridge is a statically indeterminate system outside and a statically indeterminate system inside, so it has no effect on uneven settlement of pier and abutment. Tie arch bridge can be divided into two types: thrust system and non-thrust system. In the construction process of tied arch bridge, the influence of the stiffness of tie bar on the composite system, the influence of the prestress in the tie bar and the force of the tie bar itself on the arch is always a problem worthy of further discussion. Therefore, it is worth studying to compare the stiffness of tie bar with the change of arch stiffness to determine the reasonable stiffness value. Based on the Qionghai Jiuqu River Bridge Project in Hainan Province, this paper studies the long-span concrete-filled steel tube tied arch bridge. The main contents are as follows: 1 combined with the Jiuqu River Bridge engineering example, This paper introduces the process of establishing the model of tied arch bridge, and makes a detailed analysis and research on several key boundary conditions and the division of construction stage. It provides a reference for the establishment of finite element model of tied arch bridge in the future. 2. By modeling and calculating, the forces of the combined system under different tie member stiffness and arch stiffness are simulated, and the optimum stiffness is obtained by optimizing the tie bar and arch stiffness. The influence of different tie bar prestress on the composite system is studied. The prestress value under the optimum stress state is obtained by optimizing the tie bar prestress. 3 by changing the method of single variable and magnifying factor, the reasonable ratio of beam and arch stiffness is studied and discussed. The effects of different cross-section stiffness ratio vertical stiffness ratio different cross-section parameters and different material parameters on the dynamic characteristics of the structure of tied arch bridge are presented. Finally the optimum range of displacement internal forces of the corresponding parameters is obtained by calculation and comparison.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.225

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 吳文平;黃炳生;樊建慧;;3種不同鋼管混凝土本構(gòu)關(guān)系模型研究[J];四川建筑科學(xué)研究;2009年06期

2 顧安邦,徐君蘭;中、下承式拱橋短吊桿結(jié)構(gòu)行為分析[J];重慶交通學(xué)院學(xué)報(bào);2002年04期

3 盛興旺;李松報(bào);;確定系桿拱橋吊桿力的剛性連續(xù)梁法算法[J];鐵道科學(xué)與工程學(xué)報(bào);2009年03期

4 虞建成,邵容光,王小林;系桿拱橋吊桿初始張拉力及施工控制[J];東南大學(xué)學(xué)報(bào);1998年03期

5 張林清;;鋼管混凝土拱橋線型控制[J];國(guó)防交通工程與技術(shù);2009年01期

6 劉亞平;鋼筋混凝土系桿拱橋吊桿張拉計(jì)算及控制的研究[J];中國(guó)港灣建設(shè);2002年04期

7 陳大慶;系桿拱橋剛性吊桿一次張拉設(shè)計(jì)[J];華東公路;1999年05期

8 李新平,鐘健聰;空間系桿拱橋吊桿張拉控制分析[J];華南理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2004年07期

9 王景波,韓麗艷,關(guān)鍵;鋼管混凝土拱橋拱肋剛度取值[J];黑龍江工程學(xué)院學(xué)報(bào);2003年01期

10 張同飛;;先梁后拱施工的系桿拱橋吊桿張拉方案研究[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2011年07期

本文編號(hào)：2271683