本文選題：連續(xù)箱梁橋 + 仿真分析��； 參考：《廣西大學(xué)》2015年碩士論文

【摘要】：近些年來(lái),隨著對(duì)交通基礎(chǔ)設(shè)施建設(shè)的重視,我國(guó)的橋梁建設(shè)事業(yè)也得到了蓬勃發(fā)展,橋梁建設(shè)水平及施工工藝控制也取得了長(zhǎng)足的進(jìn)步。大跨度預(yù)應(yīng)力混凝土連續(xù)箱梁橋由于它獨(dú)有的優(yōu)點(diǎn)被而被人們廣泛采用。然而隨著橋梁跨徑越來(lái)越大,結(jié)構(gòu)越來(lái)越復(fù)雜,施工難度也在增大。再利用懸臂施工法進(jìn)行橋梁施工過(guò)程中,隨機(jī)誤差和系統(tǒng)誤差是不可避免的,并將隨著懸臂梁段的增加而不斷累積。如果不對(duì)此進(jìn)行誤差分析及線形修正,最終將導(dǎo)致橋梁線形偏離理論設(shè)計(jì)狀態(tài),導(dǎo)致合龍困難,并且已經(jīng)建成的懸臂段的線形在施工后期是不可調(diào)節(jié)的,因此必須在橋梁施工過(guò)程中必須對(duì)施工監(jiān)控工作給予相當(dāng)?shù)闹匾�。本文主要介紹了大跨度預(yù)應(yīng)力混凝土箱梁橋結(jié)構(gòu)的發(fā)展情況和研究概況,以及施工監(jiān)控的基本內(nèi)容和施工控制的一般方法和步驟。主要內(nèi)容是以欽江大橋?yàn)楣こ虒?shí)踐案例,對(duì)該種類型橋梁的施工監(jiān)控方法進(jìn)行研究；利用橋梁有限元軟件Midas Civil2012進(jìn)行結(jié)構(gòu)仿真分析,得到理論計(jì)算值,并與實(shí)測(cè)值進(jìn)行了對(duì)照分析；針對(duì)該類型橋梁結(jié)構(gòu)進(jìn)行了參數(shù)敏感性分析,確定了結(jié)構(gòu)設(shè)計(jì)中的主要設(shè)計(jì)參數(shù),并根據(jù)實(shí)際情況進(jìn)行反饋控制分析來(lái)調(diào)整計(jì)算參數(shù)。在線形和應(yīng)力預(yù)測(cè)方面,本文對(duì)比了理論值和實(shí)測(cè)值的差異,介紹了最小二乘法的基本原理和公式推導(dǎo)過(guò)程。在線形控制為主的同時(shí),同時(shí)注重對(duì)橋梁應(yīng)力的監(jiān)控。因此對(duì)最小二乘法進(jìn)行改進(jìn),采用線形和應(yīng)力進(jìn)行雙控來(lái)預(yù)測(cè)立模標(biāo)高,以便指導(dǎo)實(shí)際橋梁施工,取得了良好的效果,保證了橋梁在施工后期能夠順利合龍。
[Abstract]:In recent years, with the attention paid to the construction of transportation infrastructure, the construction of bridges in our country has been flourishing, and the level of bridge construction and the control of construction technology have also made great progress. Long-span prestressed concrete continuous box girder bridge is widely used because of its unique advantages. However, as the span of the bridge becomes larger and larger, the structure becomes more and more complicated and the construction difficulty increases. In the process of bridge construction using cantilever construction method, random error and systematic error are inevitable, and will accumulate with the increase of cantilever beam section. If the error analysis and alignment correction are not carried out, the alignment of the bridge will deviate from the theoretical design state, resulting in the closure difficulty, and the alignment of the cantilever section that has been built will not be adjustable in the later stage of construction. Therefore, the construction monitoring work must be paid more attention in the process of bridge construction. This paper mainly introduces the development and research situation of long-span prestressed concrete box girder bridge structure, as well as the basic content of construction monitoring and the general methods and steps of construction control. The main content of this paper is to study the construction monitoring method of this type of bridge with Qinjiang Bridge as a practical case, and to obtain the theoretical calculation value by using the bridge finite element software Midas Civil 2012 to carry out structural simulation analysis. The parameter sensitivity analysis of the bridge structure is carried out, the main design parameters are determined, and the calculation parameters are adjusted by feedback control analysis according to the actual situation. In the aspect of linear and stress prediction, the difference between the theoretical value and the measured value is compared, and the basic principle of the least square method and the derivation process of the formula are introduced. At the same time, it pays attention to the monitoring of bridge stress. Therefore, the least square method is improved to predict the elevation of vertical formwork by double control of linear shape and stress, so as to guide the actual bridge construction and obtain good results, and ensure that the bridge can close smoothly in the later stage of construction.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.4

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本文編號(hào)：2111942