本文關(guān)鍵詞：大跨鋼箱梁橋頂推施工安全控制研究　出處：《長(zhǎng)安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鋼箱梁 頂推施工 安全控制 整體受力 局部受力 風(fēng)險(xiǎn)評(píng)估

【摘要】：隨著經(jīng)濟(jì)的快速發(fā)展，橋梁跨徑的不斷增加，鋼箱梁橋在橋梁建設(shè)中得到了快速發(fā)展。近年來(lái)，鋼箱梁以其輕質(zhì)、剛度大、安裝便捷、結(jié)構(gòu)新穎等優(yōu)點(diǎn)在國(guó)內(nèi)得到了廣泛應(yīng)用。鋼箱梁一般采用等截面進(jìn)行設(shè)計(jì)，適宜采用頂推法施工。然而由于鋼箱梁頂推施工法的特殊性，頂推施工過(guò)程中存在大量的技術(shù)風(fēng)險(xiǎn)，同時(shí)頂推施工中鋼箱梁受力體系在不斷轉(zhuǎn)換，結(jié)構(gòu)受力復(fù)雜，加強(qiáng)施工風(fēng)險(xiǎn)控制和結(jié)構(gòu)安全有助于橋梁保證頂推施工的順利進(jìn)行，因此本文主要開展頂推法施工大跨鋼箱梁橋施工安全控制的研究工作。本文以沈陽(yáng)后丁香大橋和聯(lián)絡(luò)左線特大橋?yàn)橐劳泄こ�，�?duì)同類橋型開展大跨鋼箱梁頂推施工安全控制研究工作，本文的工作主要如下： (1)對(duì)橋梁結(jié)構(gòu)施工控制的內(nèi)容、方法和結(jié)構(gòu)分析方法進(jìn)行了研究和總結(jié)； (2)利用有限元軟件Midas/civil對(duì)大跨鋼箱梁橋頂推施工過(guò)程中的結(jié)構(gòu)整體受力性能進(jìn)行了分析，，提供了可靠的監(jiān)測(cè)依據(jù)，并通過(guò)現(xiàn)場(chǎng)調(diào)控結(jié)果對(duì)其安全性進(jìn)行評(píng)定；利用整體分析結(jié)果，對(duì)鋼箱梁在最不利工況下的局部受力情況進(jìn)行了分析，并分析了局部加勁和增大局部受力面積兩種措施對(duì)局部受力的影響；同時(shí)針對(duì)主梁在頂推施工過(guò)程中的受力問(wèn)題，對(duì)頂推施工的結(jié)構(gòu)設(shè)施進(jìn)行優(yōu)化設(shè)計(jì)； (3)采用現(xiàn)場(chǎng)調(diào)查法對(duì)大跨鋼箱梁頂推施工過(guò)程的潛在風(fēng)險(xiǎn)進(jìn)行識(shí)別，并建立風(fēng)險(xiǎn)評(píng)估體系，基于層次分析法(Analytic Hierarchy Process,AHP)和模糊綜合評(píng)判法(FuzzyComprehensive Evaluation, FCE)對(duì)進(jìn)行橋梁施工期的風(fēng)險(xiǎn)評(píng)價(jià)，根據(jù)評(píng)定結(jié)果和施工經(jīng)驗(yàn)，對(duì)大跨鋼箱梁頂推施工進(jìn)行風(fēng)險(xiǎn)控制。
[Abstract]:With the rapid development of economy and the increasing span of the bridge, the steel box girder bridge has been developed rapidly in the bridge construction. In recent years, the steel box girder with its light weight, large stiffness, convenient installation. The advantages of novel structure have been widely used in China. Steel box girder is generally designed with equal section and suitable for construction by pushing method. However, due to the particularity of the method of steel box girder jacking construction. There are a lot of technical risks in the process of push-push construction. At the same time, the mechanical system of steel box girder is constantly changing, and the structure is complicated. Strengthening the construction risk control and structural safety is helpful to ensure the smooth construction of the jacking construction. Therefore, this paper mainly carries out the research work of safety control of large-span steel box girder bridge construction by pushing method. This paper is based on Shenyang Houlushan Bridge and the connection left Line Bridge. The main work of this paper is as follows: (1) for the similar bridge type, the safety control work of the large span steel box girder jacking construction is carried out. 1) the contents, methods and structural analysis methods of bridge structure construction control are studied and summarized. In this paper, finite element software Midas/civil is used to analyze the overall mechanical behavior of large span steel box girder bridge during jacking construction, which provides a reliable monitoring basis. The safety was evaluated by the results of field control. Based on the results of the whole analysis, the local stress of steel box girder under the most unfavorable working conditions is analyzed, and the influence of local stiffening and increasing the area of local stress on the local force is analyzed. At the same time, aiming at the stress problem of the main beam in the process of jacking construction, the optimization design of the structure and facilities of the jacking construction is carried out. (3) the potential risk of large span steel box girder jacking construction is identified by field investigation method, and the risk assessment system is established. Based on Analytic Hierarchy Process. AHP) and Fuzzy Comprehensive Evaluation (FCEE) are used to evaluate the risk of bridge construction. According to the evaluation results and construction experience, the risk control of long span steel box girder jacking construction is carried out.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445.1;U448.213

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 張曉東;橋梁頂推施工技術(shù)[J];公路;2003年09期

2 黃僑;唐海紅;任遠(yuǎn);;基于模糊理論的大跨度橋梁評(píng)估理論研究[J];公路交通科技;2010年01期

3 龔志剛 ,劉海燕;世界最高墩橋——法國(guó)米約多塔斜拉橋[J];世界橋梁;2004年02期

4 龔志剛;頂推重量9000t的墨西哥恰帕斯連續(xù)鋼箱梁橋[J];世界橋梁;2004年03期

本文編號(hào)：1420333