本文關(guān)鍵詞： 寬箱梁橋 剪力滯效應(yīng) 比擬桿法 能量變分法 實(shí)用計(jì)算 函數(shù)擬合　出處：《華南理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著經(jīng)濟(jì)建設(shè)的發(fā)展，我國交通流量的不斷增加，公路橋梁的寬度也不斷增加，，從而使箱梁截面的形式從單箱單室截面向單箱多室截面發(fā)展，即寬箱梁愈來愈多的在橋梁建設(shè)中涌現(xiàn)。目前對(duì)單箱單室截面的剪力滯效應(yīng)研究比較多，但對(duì)寬箱梁橋剪力滯問題的研究比較少。而我國現(xiàn)行的規(guī)范缺乏如何具體確定寬箱梁橋的剪力滯效應(yīng)，因此有必要對(duì)寬箱梁剪力滯進(jìn)行研究。 本文系統(tǒng)介紹了目前剪力滯效應(yīng)的發(fā)展現(xiàn)狀和研究理論，然后根據(jù)目前的研究現(xiàn)狀提出本文的研究內(nèi)容和方向。用比擬桿法對(duì)單箱四室箱梁剪力滯效應(yīng)進(jìn)行分析，求得在集中和均布荷載作用下簡支、懸臂梁的剪力滯系數(shù)計(jì)算公式。推導(dǎo)了基于能量變分法的單箱四室剪力滯效應(yīng)的微分方程，根據(jù)常見的邊界條件和典型結(jié)構(gòu)形式對(duì)能量變分法進(jìn)行求解。結(jié)合工程算例，利用有限元軟件ANSYS和MIDAS計(jì)算結(jié)果對(duì)比擬桿法和能量變分法進(jìn)行復(fù)核，經(jīng)過比較論證了本文所推導(dǎo)公式的正確性。介紹了寬箱梁橋剪力滯效應(yīng)的四種實(shí)用計(jì)算方法及其局限性，然后根據(jù)寬箱梁橋剪力滯效應(yīng)的規(guī)律和能量變分法公式推導(dǎo)，提出相應(yīng)的擬合函數(shù)并用已計(jì)算出的數(shù)據(jù)用Origin進(jìn)行擬合，得到了簡支寬箱梁橋在集中、均布荷載作用下懸臂板、翼板的實(shí)用計(jì)算公式。本文首次結(jié)合Origin軟件和概率的方法擬合出剪力滯的實(shí)用計(jì)算公式，為橋梁工程設(shè)計(jì)人員提供了關(guān)于寬箱梁橋剪力滯計(jì)算的參考。
[Abstract]:With the development of economic construction, the traffic flow and the width of highway bridge are increasing, which makes the cross section of box girder develop from single box section to single box section to single box section. That is, more and more wide box girders are emerging in bridge construction. At present, there are many researches on shear lag effect of single box and single chamber section. However, there are few researches on the shear lag of wide box girder bridge. However, the current code of our country lacks of how to determine the shear lag effect of wide box girder bridge, so it is necessary to study the shear lag of wide box girder bridge. This paper systematically introduces the development and research theory of shear lag effect, and then puts forward the research content and direction of this paper according to the present research situation. The shear lag effect of single box four-compartment box girder is analyzed by analogy bar method. The formulas for calculating the shear lag coefficients of simply supported cantilever beams under concentrated and uniform loads are obtained. The differential equation of shear lag effect in a single box with four chambers based on the energy variational method is derived. The energy variational method is solved according to the common boundary conditions and typical structural forms. Combining with an engineering example, the analogy rod method and the energy variational method are checked by the finite element software ANSYS and MIDAS. Four practical calculation methods and their limitations of shear lag effect of wide box girder bridge are introduced, and then the formula of shear lag effect of wide box girder bridge is deduced according to the law of shear lag effect of wide box girder bridge and the formula of energy variation method. The corresponding fitting function is put forward and the calculated data is fitted with Origin. The cantilever plate of the simply supported wide box girder bridge under concentrated and uniform load is obtained. In this paper, the practical calculation formula of shear lag is first fitted with Origin software and probability method, which provides a reference for bridge designers to calculate shear lag of wide box girder bridge.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441;U448.213

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