本文關(guān)鍵詞： 連續(xù)梁橋 懸臂施工 仿真分析 自適應(yīng)控制 灰色理論　出處：《華北水利水電大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：目前,預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋已迅速成為我國(guó)橋梁建設(shè)的主要橋型之一,施工方法也更傾向于使用自架設(shè)體系、不影響橋下交通的懸臂施工方法。對(duì)于采用此施工方法的橋梁來(lái)說(shuō),在施工過(guò)程中會(huì)受到多種因素的影響,使得橋梁結(jié)構(gòu)的線形和內(nèi)力狀態(tài)會(huì)不斷變化,為了確保成橋時(shí)的實(shí)際與理論狀態(tài)趨于一致,因此,對(duì)懸臂澆筑的預(yù)應(yīng)力混凝土梁橋進(jìn)行施工控制就顯得尤為重要。本文結(jié)合焦作市“沁河大橋”改建項(xiàng)目的設(shè)計(jì)要求和施工特點(diǎn),決定采用自適應(yīng)控制方法進(jìn)行全橋的施工控制。具體實(shí)施過(guò)程,首先依托有限元軟件Midas/Civil對(duì)該橋的施工過(guò)程進(jìn)行仿真分析,獲取每個(gè)典型施工階段的撓度和應(yīng)力理論值,并在施工過(guò)程中通過(guò)測(cè)量得到實(shí)測(cè)值,從而進(jìn)行理論與實(shí)測(cè)值對(duì)比分析,進(jìn)而在模型中修正參數(shù)值,綜合分析得出下一節(jié)段的立模標(biāo)高,以此類(lèi)推,直至全橋合攏。為了使成橋線形達(dá)到設(shè)計(jì)預(yù)期,針對(duì)已施工完畢梁段無(wú)法消除的誤差,對(duì)下一節(jié)段的狀態(tài)預(yù)測(cè)就成為了關(guān)鍵。本文借助可用來(lái)進(jìn)行結(jié)構(gòu)狀態(tài)預(yù)測(cè)和估計(jì)的灰色控制理論,并將其應(yīng)用于主梁預(yù)拱度的預(yù)測(cè)中,從實(shí)測(cè)和預(yù)測(cè)結(jié)果分析來(lái)看,灰色控制理論對(duì)結(jié)構(gòu)狀態(tài)預(yù)測(cè)的效果顯著,從而使得結(jié)構(gòu)計(jì)算、施工監(jiān)控、誤差調(diào)整和狀態(tài)預(yù)測(cè)構(gòu)成了完整的自適應(yīng)控制體系�；谧赃m應(yīng)控制方法的合理開(kāi)展,保證了成橋時(shí)結(jié)構(gòu)狀態(tài)達(dá)到了設(shè)計(jì)預(yù)期,施工過(guò)程順利而高效,同時(shí),本文的研究工作,也為今后同類(lèi)型及相似橋梁的施工監(jiān)控提供了參考。
[Abstract]:At present, prestressed concrete continuous rigid frame bridge has rapidly become one of the main bridge types in bridge construction in China, and the construction method is more inclined to use self-erection system. The cantilever construction method does not affect the traffic under the bridge. For the bridge which adopts this construction method, it will be affected by many factors in the construction process, making the structure of bridge linear and internal force state will change constantly. In order to ensure that the actual and theoretical state of the bridge tend to be consistent, therefore. It is particularly important to control the construction of the cantilever cast prestressed concrete beam bridge. This paper combines the design requirements and construction characteristics of the reconstruction project of "Qinhe Bridge" in Jiaozuo City. It is decided to adopt adaptive control method to control the construction of the whole bridge. In the concrete implementation process, the construction process of the bridge is simulated and analyzed based on the finite element software Midas/Civil. The theoretical values of deflection and stress in each typical construction stage are obtained, and the measured values are obtained by measuring during the construction process, so that the theoretical and measured values are compared and analyzed, and then the parameter values are revised in the model. Comprehensive analysis of the next section of the vertical model elevation, and so on, until the whole bridge closed. In order to make the bridge line to meet the design expectations, for the completed construction of the beam section can not eliminate the error. In this paper, the grey control theory which can be used to predict and estimate the structure state is used to predict the pre-camber of the main beam. From the analysis of the measured and predicted results, the grey control theory has a remarkable effect on the structure state prediction, thus making the structure calculation and construction monitoring. Error adjustment and state prediction constitute a complete adaptive control system. Based on the reasonable development of adaptive control method, the structural state of the bridge is up to the design expectation, the construction process is smooth and efficient, and at the same time. The research work of this paper also provides a reference for the construction monitoring of the same type and similar bridges in the future.
【學(xué)位授予單位】：華北水利水電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U445.4

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相關(guān)碩士學(xué)位論文 前2條

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2 王炎;大跨度連續(xù)彎梁橋施工控制關(guān)鍵技術(shù)研究[D];西南交通大學(xué);2007年

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本文編號(hào)：1461350