本文選題：連續(xù)梁橋　切入點(diǎn)：施工控制　出處：《北京交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：為保證連續(xù)梁橋的成橋線形、應(yīng)力狀態(tài)與理想狀態(tài)很好的吻合,以及結(jié)構(gòu)在懸臂施工過(guò)程中的安全與穩(wěn)定,橋梁施工控制受到了越來(lái)越多的重視。本文以隴海路主線南幅橋?yàn)楣こ瘫尘?對(duì)大跨徑預(yù)應(yīng)力混凝土連續(xù)梁橋施工控制進(jìn)行研究,主要研究?jī)?nèi)容及結(jié)論如下： 1、基于有限元原理及隴海路主線南幅橋施工特點(diǎn),利用Midas軟件建立有限元模型,對(duì)該橋進(jìn)行施工過(guò)程模擬分析,得出橋梁變形及控制截面的應(yīng)力狀態(tài)； 2、結(jié)合本工程受力特征及施工進(jìn)度,編制施工監(jiān)控方案,對(duì)大橋的施工全程進(jìn)行監(jiān)控。其監(jiān)控項(xiàng)目主要包括應(yīng)力、線形、溫度及臨時(shí)支墩穩(wěn)定性監(jiān)控。通過(guò)有效的施工控制,各應(yīng)力監(jiān)測(cè)斷面實(shí)際應(yīng)力狀態(tài)隨施工進(jìn)程發(fā)展?fàn)顩r符合預(yù)期設(shè)計(jì)目標(biāo)、線形符合設(shè)計(jì)要求、溫度變化對(duì)梁體扭轉(zhuǎn)變形較小、T構(gòu)兩側(cè)臨時(shí)支墩變形基本一致且穩(wěn)定性較好； 3、在應(yīng)力監(jiān)控中,對(duì)實(shí)測(cè)應(yīng)力計(jì)算方法進(jìn)行了研究。本文實(shí)測(cè)應(yīng)力計(jì)算考慮階段施工中收縮、徐變的影響,并用Matlab進(jìn)行編程計(jì)算。通過(guò)比較分析,考慮混凝土收縮、徐變所得的實(shí)測(cè)應(yīng)力與計(jì)算值差別較小,按此方法由實(shí)測(cè)應(yīng)變得到橋梁的真實(shí)應(yīng)力狀態(tài)是可行的； 4、線形控制的主要工作之一就是提供立模標(biāo)高。為提高立模標(biāo)高管理工作效率,確保數(shù)據(jù)信息的準(zhǔn)確性與安全性,本文基于Access建立立模標(biāo)高管理系統(tǒng)； 5、本文提出了基于響應(yīng)面法的參數(shù)敏感性分析方法,簡(jiǎn)化了參數(shù)敏感性分析過(guò)程。通過(guò)對(duì)隴海路主線南幅橋的參數(shù)敏感性分析可知,所選影響參數(shù)對(duì)結(jié)構(gòu)狀態(tài)的影響基本呈線性關(guān)系,且在不同施工階段影響程度不同�？傮w來(lái)說(shuō),對(duì)撓度的敏感性而言,混凝土彈性模量和截面抗彎慣性矩為主要影響參數(shù),混凝土容重和預(yù)應(yīng)力為次要影響參數(shù)；對(duì)截面應(yīng)力的敏感性而言,混凝土容重和預(yù)應(yīng)力為主要影響參數(shù),抗彎慣性矩和混凝土彈性模量為次要影響參數(shù)。
[Abstract]:In order to ensure the bridge shape of continuous beam bridge, the stress state is in good agreement with the ideal state, and the structure is safe and stable in the process of cantilever construction. More and more attention has been paid to bridge construction control. In this paper, the construction control of long-span prestressed concrete continuous beam bridge is studied with the main line of Longhai Road as the engineering background. The main research contents and conclusions are as follows:. 1. Based on the finite element principle and the construction characteristics of the main line of Longhai Road, the finite element model is established by using Midas software, and the bridge deformation and the stress state of the control section are obtained by simulating and analyzing the construction process of the bridge. 2. According to the stress characteristics and construction schedule of the project, the construction monitoring scheme is worked out to monitor the whole construction of the bridge. The monitoring items mainly include stress, line shape, temperature and the stability of temporary piers. The actual stress state of each stress monitoring section accords with the expected design objective with the development of the construction process, the linear shape accords with the design requirements, and the temperature change is basically consistent and stable to the deformation of the temporary pier on both sides of the beam with small torsional deformation. 3, in the stress monitoring, the calculation method of the measured stress is studied. In this paper, the effect of shrinkage and creep in the construction stage is considered in the calculation of the measured stress, and the program calculation is carried out with Matlab. Through comparison and analysis, the shrinkage of concrete is considered. The difference between the measured stress and the calculated value is small, so it is feasible to get the true stress state of the bridge from the measured strain by this method. 4. One of the main tasks of linear control is to provide vertical die elevation. In order to improve the efficiency of vertical die elevation management and ensure the accuracy and security of data information, this paper establishes a vertical die elevation management system based on Access. 5. In this paper, a parameter sensitivity analysis method based on response surface method is proposed, which simplifies the process of parameter sensitivity analysis. The influence of the selected parameters on the structural state is linear, and the influence degree is different in different construction stages. In general, the elastic modulus of concrete and the bending moment of inertia of the section are the main influencing parameters for the sensitivity of deflection. The concrete bulk density and prestress are the secondary influencing parameters, the concrete bulk density and prestress are the main influencing parameters, and the moment of inertia and the elastic modulus of concrete are the secondary influence parameters.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.215;U445

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 范立礎(chǔ),杜國(guó)華,馬健中;斜拉橋索力優(yōu)化及非線性理想倒退分析[J];重慶交通學(xué)院學(xué)報(bào);1992年01期

2 顧安邦,常英,樂(lè)云祥;大跨徑預(yù)應(yīng)力連續(xù)剛構(gòu)橋施工控制的理論與方法[J];重慶交通學(xué)院學(xué)報(bào);1999年04期

3 李著,王景;西奧多庫(kù)珀——魁北克大橋失事記[J];工程力學(xué);1997年04期

4 黎雙邵;張勇;黃沛;;監(jiān)測(cè)與監(jiān)控技術(shù)在橋梁施工中的作用[J];中國(guó)港灣建設(shè);2008年02期

5 劉剛亮;虎門大橋輔航道橋懸臂施工中的溫度影響[J];公路;1998年05期

6 李國(guó)平;劉健;;大跨連續(xù)梁橋線形最優(yōu)施工控制的理論與方法[J];華東公路;1992年02期

7 郭勤濤;張令彌;費(fèi)慶國(guó);;用于確定性計(jì)算仿真的響應(yīng)面法及其試驗(yàn)設(shè)計(jì)研究[J];航空學(xué)報(bào);2006年01期

8 方志,劉光棟,王光炯;斜拉橋施工的灰色預(yù)測(cè)控制系統(tǒng)[J];湖南大學(xué)學(xué)報(bào)(自然科學(xué)版);1997年03期

9 林元培;卡爾曼濾波法在斜拉橋施工中的應(yīng)用[J];土木工程學(xué)報(bào);1983年03期

10 徐岳,鮮正洪,張勁泉;懸索橋加勁梁架設(shè)階段灰色控制系統(tǒng)的研究[J];西安公路交通大學(xué)學(xué)報(bào);1998年01期

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