本文關(guān)鍵詞： 橋梁健康監(jiān)測 易損件分析 正常運營 極端荷載　出處：《福州大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近三十年來,為了滿足國民經(jīng)濟發(fā)展的需要,我國建立了大量的鐵路、公路、橋梁。然而,頻繁發(fā)生的橋梁安全事故給我們敲響了警鐘。橋梁結(jié)構(gòu)在投入運營之后,將不可避免的發(fā)生超載以及材料性能退化等現(xiàn)象,這將使橋梁結(jié)構(gòu)的安全受到挑戰(zhàn)。因此,通過對具體橋型進行具體分析,了解橋梁結(jié)構(gòu)的易損件和易損部位,從而便于橋梁結(jié)構(gòu)后期的日常管理、養(yǎng)護、監(jiān)測以及預(yù)警的工作具有很大的意義。首先,簡單介紹了易損性的定義及其影響因素,并深入總結(jié)了橋梁健康監(jiān)測與易損件分析之間的關(guān)系,闡述了本文的研究目的和主要內(nèi)容。其次,本文詳細探討了斜拉橋各個構(gòu)件的有限元模擬方法,以淮安閩江大橋(45+67+416+67+45m)為工程背景,通過有限元分析軟件ANSYS10.0建立斜拉橋的計算模型,并利用實測數(shù)據(jù)對有限元模型進行調(diào)整。然后,分析了橋梁在正常運營情況下的車輛荷載效應(yīng),并對斜拉橋在正常運營情況下進行結(jié)構(gòu)易損件分析,找到斜拉橋在正常運營情況下的易損件和易損部位。而且利用IBIS-S微變形遠程監(jiān)測雷達系統(tǒng)對斜拉橋在正常運營情況的變形進行實時監(jiān)測,獲得了橋梁主跨各點在正常運營情況下的動撓度時程曲線及豎向頻率,介紹了如何利用這些實測數(shù)據(jù)初步判別橋梁的健康狀況。最后,介紹了極端荷載的種類,并根據(jù)具體的情況分別對斜拉橋在超載、構(gòu)件性能退化、臺風(fēng)三種情況下的易損件進行分析,從而得到斜拉橋結(jié)構(gòu)在極端荷載下的易損件和易損部位。本文通過提出這樣的思路和方法,從而為今后的橋梁健康監(jiān)測傳感器的布置及預(yù)警系統(tǒng)的設(shè)計提供指導(dǎo),同時可以為今后同類橋型的設(shè)計提供借鑒�？偠灾�,這樣的嘗試和探討具有一定的工程意義。
[Abstract]:In the past 30 years, in order to meet the needs of national economic development, China has established a large number of railways, highways and bridges. However, the frequent accidents of bridge safety have sounded the alarm bell for us. After the bridge structure has been put into operation, Overloading and material degradation will inevitably occur, which will challenge the safety of the bridge structure. Therefore, through the specific analysis of the specific bridge type, we can understand the vulnerable parts and vulnerable parts of the bridge structure. Therefore, it is of great significance to facilitate the daily management, maintenance, monitoring and early warning of bridge structure in the later stage. Firstly, the definition of vulnerability and its influencing factors are briefly introduced. The relationship between bridge health monitoring and damage analysis is summarized, and the purpose and main contents of this paper are expounded. Secondly, the finite element simulation method of each component of cable-stayed bridge is discussed in detail. Taking the Huaian Minjiang River Bridge 4567 416 67 45m as the engineering background, the calculation model of the cable-stayed bridge is established by the finite element analysis software ANSYS10.0, and the finite element model is adjusted by using the measured data. This paper analyzes the vehicle load effect of the bridge under normal operation, and analyzes the structural damage parts of the cable-stayed bridge under the normal operation condition. Find the vulnerable parts and vulnerable parts of cable-stayed bridge under normal operation condition, and use IBIS-S micro-deformation remote monitoring radar system to monitor the deformation of cable-stayed bridge in normal operation in real time. The dynamic deflection time history curve and vertical frequency of each point of the main span of the bridge under normal operation conditions are obtained, and how to use these measured data to judge the bridge health condition is introduced. Finally, the types of extreme loads are introduced. According to the concrete situation, the paper analyzes the vulnerable parts of the cable-stayed bridge under the conditions of overload, degradation of component performance and typhoon. Thus, the vulnerable parts and vulnerable parts of cable-stayed bridge structures under extreme loads are obtained. This paper provides guidance for the design of bridge health monitoring sensors and early warning systems in the future by putting forward such ideas and methods. At the same time, it can be used for reference for similar bridge design in the future. In a word, such attempt and discussion have certain engineering significance.
【學(xué)位授予單位】：福州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U446

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