本文關(guān)鍵詞：簡(jiǎn)支鋼管混凝土梁拱組合體系橋設(shè)計(jì)參數(shù)優(yōu)化　出處：《重慶交通大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 梁拱組合體系 設(shè)計(jì)參數(shù) 拱軸線(xiàn) 矢跨比 剛度比 吊桿力

【摘要】：梁拱組合體系橋結(jié)合了梁橋和拱橋的特點(diǎn),在荷載的作用下,各構(gòu)件形成體系協(xié)同工作,結(jié)構(gòu)受力合理、外形美觀(guān),克服了傳統(tǒng)拱橋拱腳推力大對(duì)地基要求高的缺點(diǎn),成為極富有競(jìng)爭(zhēng)力的一類(lèi)橋型,廣泛的應(yīng)用于橋梁建設(shè)中。但對(duì)梁拱組合體系橋的理論研究仍落后于工程實(shí)踐,理論體系不完善,在設(shè)計(jì)優(yōu)化方面研究不足。因此研究簡(jiǎn)支鋼管混凝土梁拱組合體系橋設(shè)計(jì)參數(shù)優(yōu)化是具有一定意義的。本文主要研究?jī)?nèi)容及結(jié)論包括:①采用有限元軟件Midas Civil建立瓊海九曲江大橋有限元模型,進(jìn)行結(jié)構(gòu)靜動(dòng)力計(jì)算,并將應(yīng)力計(jì)算值與施工監(jiān)控值相對(duì)比。計(jì)算結(jié)果表明結(jié)構(gòu)施工過(guò)程安全,成橋狀態(tài)較為合理,所建有限元模型符合實(shí)際情況。②闡述有限元模型分析與理論計(jì)算相結(jié)合的拱軸線(xiàn)優(yōu)化方法的原理,并利用該方法對(duì)九曲江大橋進(jìn)行拱軸線(xiàn)優(yōu)化,削弱了拱肋彎矩峰值,使彎矩分布更加均勻,有效地改善了拱肋的受力狀況。③矢跨比、拱梁剛度比、吊桿剛度均為影響結(jié)構(gòu)靜動(dòng)力特性的重要設(shè)計(jì)參數(shù),分別取多個(gè)參數(shù)值,計(jì)算結(jié)構(gòu)在恒載、活載、溫度荷載作用下的內(nèi)力與撓度,并分析結(jié)構(gòu)的自振頻率及振型,在總結(jié)設(shè)計(jì)參數(shù)對(duì)結(jié)構(gòu)靜動(dòng)力特性影響規(guī)律的同時(shí),給出了合理的取值范圍,為該體系橋的設(shè)計(jì)提供了一定參考。④闡述了剛性支承連續(xù)梁法、力的平衡法的吊桿力優(yōu)化原理,并運(yùn)用上述理論優(yōu)化九曲江大橋成橋吊桿力,改善結(jié)構(gòu)成橋受力狀況,將優(yōu)化后成橋吊桿力、結(jié)構(gòu)位移及成橋彎矩與原設(shè)計(jì)進(jìn)行對(duì)比,分析兩種方法的優(yōu)化特點(diǎn)和優(yōu)化效果。計(jì)算結(jié)果表明采用剛性支承連續(xù)梁法有效地控制了系梁成橋線(xiàn)形,采用力的平衡法則對(duì)系梁成橋彎矩更有利。⑤介紹了倒拆法和正裝迭代法的計(jì)算原理,并應(yīng)用正裝迭代法計(jì)算九曲江大橋的吊桿施工張拉力,使吊桿一次張拉到位,避免了后期復(fù)雜的調(diào)索過(guò)程;采用張拉關(guān)鍵吊桿的方式改善拱肋混凝土泵送過(guò)程中鋼管拱的受力狀況,通過(guò)二分法原理利用有限元軟件計(jì)算合適的吊桿張拉力,有效地減少了施工過(guò)程中鋼管拱的應(yīng)力和變形。
[Abstract]:The beam-arch composite system bridge combines the characteristics of beam bridge and arch bridge. Under the action of load, each member forms a system to work together, the structure force is reasonable, the appearance is beautiful. It overcomes the shortcoming of the traditional arch bridge with high thrust on the foundation, and becomes a kind of bridge type which is very competitive. It is widely used in bridge construction, but the theoretical research of the bridge is still behind the engineering practice, and the theoretical system is not perfect. Therefore, it is of certain significance to study the optimization of design parameters of simply supported CFST beam arch composite system bridge. The main contents and conclusions of this paper are as follows:. 1. The finite element model of Qionghai Jiuqu River Bridge is established by using the finite element software Midas Civil. The static and dynamic calculation of the structure is carried out, and the stress calculation value is compared with the construction monitoring value. The calculation results show that the construction process of the structure is safe and the state of the bridge is reasonable. The established finite element model is in line with the actual situation .2 describes the principle of the arch axis optimization method combined with the finite element model analysis and theoretical calculation, and uses this method to optimize the arch axis of Jiuqu River Bridge. The peak moment of arch rib is weakened, the distribution of moment is more uniform, and the stress condition of arch rib is improved effectively. The ratio of span to riser, the ratio of stiffness to stiffness of arch beam and the stiffness of suspender are all important design parameters which affect the static and dynamic characteristics of the structure. The internal force and deflection of the structure under dead load, live load and temperature load are calculated, and the natural vibration frequency and vibration mode of the structure are analyzed. While summing up the influence of design parameters on the static and dynamic characteristics of the structure, a reasonable range of values is given, which provides a certain reference for the design of the system bridge and expounds the method of rigid supported continuous beam. The force balance method of the suspension force optimization principle, and the use of the above theory to optimize the Jiuqu River Bridge suspension force, improve the structure of the bridge force condition, will be optimized after the bridge suspenders force. The structural displacement and bridge bending moment are compared with the original design, and the optimization characteristics and effects of the two methods are analyzed. The calculation results show that the rigid support continuous beam method can effectively control the linear shape of the system girder bridge. This paper introduces the calculation principle of inverted disassembly method and formal iteration method, and calculates the tension force of suspension rod construction of Jiuqu River Bridge by using force balance rule. The lifting rod is put in place at one time to avoid the complicated process of adjusting the cable in the later stage; The stress condition of steel pipe arch in the process of concrete pumping with arch rib is improved by using the method of tension key suspender, and the suitable tension of suspender is calculated by using finite element software through the principle of dichotomy. The stress and deformation of steel tube arch during construction are reduced effectively.
【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】：2015
【分類(lèi)號(hào)】：U442.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 盛興旺;章開(kāi)東;姚君芳;;確定剛架系桿拱橋合理成橋狀態(tài)和成橋吊桿力的方法探討[J];廣東建材;2008年12期

2 陳昀明;楊亞林;陳寶春;;鋼管混凝土拱梁組合橋橋型分析[J];公路;2006年12期

3 陳寶春;楊亞林;;鋼管混凝土拱橋調(diào)查與分析[J];世界橋梁;2006年02期

4 崔巍;;鋼管混凝土拱橋在港口工程中的應(yīng)用[J];結(jié)構(gòu)工程師;2010年03期

5 劉利軍;;鎮(zhèn)江京杭運(yùn)河特大橋主跨(90+180+90)m連續(xù)梁拱施工技術(shù)[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2012年06期

6 羅曉甜;汪雙炎;;巫山長(zhǎng)江大橋景觀(guān)設(shè)計(jì)研究[J];橋梁建設(shè);2007年S2期

7 趙國(guó)強(qiáng);賈高炯;;鋼管混凝土梁拱組合橋梁結(jié)構(gòu)分析[J];公路工程;2012年06期

相關(guān)碩士學(xué)位論文 前1條

1 滕麗平;梁拱組合體系橋受力性能研究[D];中南林業(yè)科技大學(xué);2012年

，

本文編號(hào)：1406752