本文關(guān)鍵詞： 連續(xù)剛構(gòu)橋 施工分析 模態(tài)分析 橋梁健康監(jiān)測 狀態(tài)評估　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國民經(jīng)濟(jì)的快速發(fā)展,大型橋梁在交通網(wǎng)絡(luò)中的角色越來越重要。近年來,橋梁承擔(dān)的交通任務(wù)日益繁重,因此橋梁結(jié)構(gòu)的安全狀態(tài)越來越受人們的重視。隨著橋梁跨徑的不斷增加以及施工工藝的日益復(fù)雜,實(shí)時(shí)監(jiān)測大型橋梁結(jié)構(gòu)的運(yùn)營環(huán)境條件和結(jié)構(gòu)健康狀況具有重要意義。橋梁健康監(jiān)測系統(tǒng)作為提取橋梁響應(yīng)信息的有效手段,越來越受到土木研究人員的重視。目前橋梁健康監(jiān)測系統(tǒng)設(shè)計(jì)中的仿真分析主要是集中在運(yùn)營階段的力學(xué)性能分析,對施工階段的的仿真分析較少。但是眾多橋梁施工事故說明:橋梁在施工過程實(shí)際上已經(jīng)產(chǎn)生一些病害,所以在橋梁健康監(jiān)測系統(tǒng)設(shè)計(jì)的仿真分析過程中必須要結(jié)合施工分析,才能比較全面的掌握橋梁健康狀況。本文以重慶江津長江大橋?yàn)楣こ瘫尘?以有限元仿真方法對該橋進(jìn)行施工過程和運(yùn)營階段的仿真分析,并結(jié)合近幾年該橋梁的檢測報(bào)告,設(shè)計(jì)了一套健康監(jiān)測系統(tǒng)并應(yīng)用于大橋。通過對監(jiān)測數(shù)據(jù)進(jìn)行分析,評估該橋的健康狀況。本文的主要研究內(nèi)容如下:①回顧了近些年來國內(nèi)外橋梁健康監(jiān)測系統(tǒng)的應(yīng)用現(xiàn)狀,對本文的研究目的和主要研究內(nèi)容進(jìn)行了闡述。②首先介紹了橋梁健康監(jiān)測系統(tǒng)的基本組成部分,對橋梁結(jié)構(gòu)的主要監(jiān)測內(nèi)容及常用的傳感器進(jìn)行了歸納分類。并結(jié)合幾種常用橋型的受力特點(diǎn)和傳統(tǒng)經(jīng)驗(yàn),總結(jié)了幾種橋型需要著重監(jiān)測的內(nèi)容。③采用MIDAS軟件對江津長江大橋進(jìn)行施工分析和運(yùn)營階段分析,在此基礎(chǔ)上設(shè)計(jì)了各類靜力傳感器的布置方案。采用ANSYS軟件對江津長江大橋進(jìn)行模態(tài)分析,在此基礎(chǔ)上設(shè)計(jì)了動力加速度傳感器的布置方案。④根據(jù)上述分析結(jié)果,結(jié)合近幾年江津大橋的病害統(tǒng)計(jì)情況,設(shè)計(jì)了一套應(yīng)用于該橋的健康監(jiān)測系統(tǒng)。通過分析監(jiān)測數(shù)據(jù),對大橋的健康狀況進(jìn)行評估。
[Abstract]:With the rapid development of the national economy, the role of large bridges in the transportation network is becoming more and more important. In recent years, the bridge undertakes more and more heavy traffic tasks. Therefore, people pay more and more attention to the safety state of bridge structure. With the increasing span of bridge and the increasingly complex construction technology. It is very important to monitor the operating environment condition and the structure health condition of large bridge structure in real time. The bridge health monitoring system is an effective means to extract the bridge response information. More and more attention has been paid by civil researchers. At present, the simulation analysis of bridge health monitoring system design is mainly focused on the mechanical performance analysis in the operation phase. The simulation analysis of the construction stage is less, but many bridge construction accidents show that the bridge in the construction process has actually produced some diseases. Therefore in the bridge health monitoring system design simulation analysis process must be combined with construction analysis in order to fully grasp the bridge health. This paper takes the Chongqing Jiang Jin Yangtze River Bridge as the engineering background. The finite element simulation method is used to analyze the construction process and operation stage of the bridge, and combined with the detection report of the bridge in recent years. A health monitoring system is designed and applied to the bridge. The monitoring data are analyzed. The main contents of this paper are as follows: 1. Review the application status of bridge health monitoring system at home and abroad in recent years. The purpose and main contents of this paper are expounded. 2. Firstly, the basic components of bridge health monitoring system are introduced. The main monitoring contents of bridge structure and the commonly used sensors are summarized and classified, and combined with the stress characteristics and traditional experience of several commonly used bridge types. This paper summarizes the contents of several bridge types which need to be monitored emphatically. 3. The construction analysis and operation phase analysis of Jiang Jin Yangtze River Bridge are carried out by using MIDAS software. On this basis, the layout scheme of various static sensors is designed, and the modal analysis of Jiang Jin Yangtze River Bridge is carried out by using ANSYS software. On this basis, the layout of the dynamic acceleration sensor is designed. 4 according to the above analysis results, combined with the recent years of Jiang Jin Bridge disease statistics. A health monitoring system applied to the bridge is designed, and the health condition of the bridge is evaluated by analyzing the monitoring data.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U446

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