本文選題：單箱三室　切入點(diǎn)：剪力滯效應(yīng)　出處：《長(zhǎng)安大學(xué)》2015年碩士論文

【摘要】：隨著交通事業(yè)的發(fā)展,交通流對(duì)橋梁寬度的要求提高,單箱三室或者單箱多室箱梁橋大量出現(xiàn),由于多室箱梁在彎曲時(shí)各腹板剪力流分布的差異,翼板的剪力滯效應(yīng)分布規(guī)律必然不同于單室箱梁。既有研究主要針對(duì)于單室箱梁,同時(shí)對(duì)雙室箱梁也有一定的研究,如何考慮三室或者多室箱梁剪力滯效應(yīng)的特殊性從而建立相應(yīng)的分析方法是非常必要的。論文以紅光路灃河大橋?yàn)閷?duì)象研究單箱三室寬箱梁橋的剪力滯效應(yīng),論文主要做了以下幾個(gè)方面工作:1.首先介紹剪力滯效應(yīng)的概念、發(fā)展及現(xiàn)有的一些關(guān)于計(jì)算剪力滯效應(yīng)的主要理論和方法;2.根據(jù)能量變分法推導(dǎo)出箱梁剪力滯效應(yīng)的通用公式,并根據(jù)邊界條件和所受荷載的不同給出簡(jiǎn)支和懸臂梁在各種荷載形式下的公式,同時(shí)也對(duì)變截面的箱梁利用變分法整理出剪力滯效應(yīng)的公式。最后用一個(gè)實(shí)例對(duì)有限元計(jì)算法(ANSYS)和變分法理論公式的計(jì)算結(jié)果進(jìn)行對(duì)比和分析。3.以紅光路灃河大橋?yàn)楣こ虒?shí)例,分別采用MIDAS/CIVIL建立橋梁結(jié)構(gòu)的整體模型和空間有限元程序(ANSYS)建立橋梁部分結(jié)構(gòu)的有限元模型,對(duì)紅光路灃河大橋0#塊和跨中梁段在恒載荷載作用下的剪力滯效應(yīng)進(jìn)行深入的分析。4.以箱梁的0#塊為基礎(chǔ)利用有限元計(jì)算軟件(ANSYS)分別計(jì)算和分析箱梁的頂板厚度、腹板厚度、箱梁高度、翼緣板寬度、箱室橫向?qū)挾鹊淖兓瘜?duì)箱梁剪力滯效應(yīng)的影響。通過(guò)分析比較可得,以上每個(gè)因素的變化都會(huì)對(duì)箱梁剪力滯效應(yīng)有一定的影響,但每個(gè)因素對(duì)箱梁影響的效果和程度是不相同的。最后對(duì)橋梁設(shè)計(jì)工作中影響單箱三室箱梁剪力滯效應(yīng)的因素提出相關(guān)的意見(jiàn),并對(duì)全文的工作進(jìn)行了一個(gè)總結(jié)和展望。
[Abstract]:With the development of transportation industry, the demand of traffic flow on bridge width is raised. A large number of single box girder bridges with three or more rooms appear, because of the difference of shear flow distribution between web plates when multi-chamber box girder is bending. The distribution law of shear lag effect of flange plate must be different from that of single chamber box girder. Both the research is mainly aimed at single chamber box girder, and the double chamber box girder is also studied to a certain extent. It is very necessary to consider the particularity of shear lag effect of three-chamber or multi-chamber box girder and establish the corresponding analysis method. This paper studies the shear lag effect of single box and three-room wide box girder bridge with Hongguang Lu River Bridge as an object. Firstly, the concept of shear lag effect is introduced, and some main theories and methods for calculating shear lag effect are introduced. 2. According to the energy variational method, a general formula for shear lag effect of box girder is derived. The formulas of simply supported beam and cantilever beam under various load forms are given according to the boundary conditions and the load. At the same time, the formulas of shear lag effect of box girder with variable cross-section are sorted out by variational method. Finally, the calculation results of finite element method ANSYS) and variational method are compared and analyzed with an example. 3. Taking Hongguang Lujiahe Bridge as an engineering example, The integral model of bridge structure and the finite element model of partial bridge structure are established by MIDAS/CIVIL and ANSYS, respectively. The shear lag effect of the 0# block and the mid-span beam section of the Hongguang Road Yuhe River Bridge under dead load is analyzed. 4. The roof thickness and the web thickness of the box girder are calculated and analyzed by the finite element calculation software ANSYSbased on the basis of the box girder block. The influence of the height of box girder, the width of flange plate and the transverse width of box chamber on the shear lag effect of box girder is analyzed and compared. However, the effect and degree of each factor on box girder are different. Finally, the paper puts forward some opinions on the factors that affect the shear lag effect of single box and three room box girder in the bridge design work, and makes a summary and prospect of the work in this paper.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441;U448.213

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本文編號(hào)：1685770