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。對于采用此施工方法的橋梁來說,在施工過程中會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)會不斷變化,為了確保成橋時的實(shí)際與理論狀態(tài)趨于一致,因此,對懸臂澆筑的預(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)施過程,首先依托有限元軟件Midas/Civil對該橋的施工過程進(jìn)行仿真分析,獲取每個典型施工階段的撓度和應(yīng)力理論值,并在施工過程中通過測量得到實(shí)測值,從而進(jìn)行理論與實(shí)測值對比分析,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,以此類推,直至全橋合攏。為了使成橋線形達(dá)到設(shè)計預(yù)期,針對已施工完畢梁段無法消除的誤差,對下一節(jié)段的狀態(tài)預(yù)測就成為了關(guān)鍵。本文借助可用來進(jìn)行結(jié)構(gòu)狀態(tài)預(yù)測和估計的灰色控制理論,并將其應(yīng)用于主梁預(yù)拱度的預(yù)測中,從實(shí)測和預(yù)測結(jié)果分析來看,灰色控制理論對結(jié)構(gòu)狀態(tài)預(yù)測的效果顯著,從而使得結(jié)構(gòu)計算、施工監(jiān)控、誤差調(diào)整和狀態(tài)預(yù)測構(gòu)成了完整的自適應(yīng)控制體系。基于自適應(yīng)控制方法的合理開展,保證了成橋時結(jié)構(gòu)狀態(tài)達(dá)到了設(shè)計預(yù)期,施工過程順利而高效,同時,本文的研究工作,也為今后同類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)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U445.4

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 宋麗加;大跨度預(yù)應(yīng)力混凝土連續(xù)梁懸臂施工控制研究[D];西南交通大學(xué);2007年

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：1461350