連續(xù)剛構大橋建設—營運期全壽命監(jiān)測與評估技術
發(fā)布時間：2019-06-02 22:49
【摘要】：橋梁建設期的施工監(jiān)控和營運期的健康監(jiān)測分別對橋梁建設期和營運期的安全起積極的保障作用。目前這兩者往往相對獨立、沒有形成一體化的監(jiān)測模式,造成了橋梁監(jiān)測信息的完整性、連貫性不足。另一方面,橋梁健康監(jiān)測具有海量信息,而且由于橋梁本身存在材料、結構組合、工作環(huán)境、測試信號等方面的不確定性因素較多,造成至今未形成系統(tǒng)的橋梁安全評估方法和技術,大大影響了橋梁健康監(jiān)測效率。在上述背景下,本論文以連續(xù)剛構大橋為研究對象,針對大型橋梁建設—營運期全壽命監(jiān)測模式與實用化評估技術展開研究,主要研究內容包括： ①在對比分析大型橋梁建設期和營運期監(jiān)測內容、監(jiān)測項目的基礎上,利用預埋—表貼傳感器監(jiān)測信息的相關性和“接力”,提出了大型橋梁建設—營運期全壽命監(jiān)測的理念,并具體闡述了全壽命監(jiān)測的原理、工作模式及它的優(yōu)勢；針對橋梁在建設期和營運期的應力監(jiān)測信息量龐大,且可能存在缺失現(xiàn)象以及信號含有“噪聲”因素的問題,研究了采用神經(jīng)網(wǎng)絡修復法對殘缺數(shù)據(jù)進行修復,以及采用基于小波理論的信號消噪技術對監(jiān)測信息中的“噪聲”進行消除處理的相關技術。 ②從應力監(jiān)測角度出發(fā),借鑒荷載試驗應變校驗系數(shù)的概念,提出了大型橋梁基于監(jiān)測信息的應力校驗系數(shù)包絡評估技術；在分析活載、溫度、初始應力等因素的基礎上,研究了大型橋梁基于容許應力包絡的安全評估技術。 ③從撓度監(jiān)測角度出發(fā),結合撓度監(jiān)測和數(shù)據(jù)包絡分析的特點,借鑒荷載試驗撓度校驗系數(shù)的概念,提出了大型橋梁基于撓度校驗系數(shù)包絡的評估技術；結合橋梁設計規(guī)范中關于容許撓度的限值規(guī)定,研究了大型橋梁基于容許撓度包絡的安全評估技術。 ④最后以重慶豐都龍河特大橋—主跨240m的連續(xù)剛構大橋為依托工程,利用豐富的建設期施工監(jiān)控信息和營運期健康監(jiān)測信息,具體闡述和驗證了如何利用預埋—表貼傳感器監(jiān)測信息的相關性和“接力”,實現(xiàn)大型橋梁建設—營運期的全壽命監(jiān)測；同時,利用實測數(shù)據(jù),完成了該大橋基于應力和撓度監(jiān)測的安全評估,該評估結果與大橋荷載試驗檢測結果對比分析表明,本文提出的基于應力和撓度“包絡”的大橋安全評估技術是可行的。 本文提出的連續(xù)剛構大橋建設—營運期全壽命監(jiān)測與評估技術,對實施橋梁的全壽命監(jiān)測與評估、保證橋梁結構安全具有積極的現(xiàn)實意義,具有良好的推廣應用前景。
[Abstract]:The construction monitoring during the bridge construction period and the health monitoring during the operation period play an active role in ensuring the safety of the bridge construction period and the operation period, respectively. At present, the two are often relatively independent, there is no integrated monitoring model, resulting in the integrity of bridge monitoring information, insufficient coherence. On the other hand, bridge health monitoring has a lot of information, and because there are many uncertain factors in material, structure combination, working environment, test signal and so on, there are many uncertain factors in the bridge itself, such as material, structure combination, working environment, test signal and so on. As a result, there is no systematic bridge safety assessment method and technology, which greatly affects the efficiency of bridge health monitoring. Under the above background, this paper takes the continuous rigid frame bridge as the research object, and studies the whole life monitoring model and practical evaluation technology of large bridge construction and operation period. The main research contents are as follows: (1) based on the comparative analysis of the monitoring contents of the construction period and operation period of large bridges and the monitoring projects, the correlation and "relay" of monitoring information by using embedded and surface sensor are used. The concept of whole life monitoring for large bridge construction and operation period is put forward, and the principle, working mode and its advantages of whole life monitoring are expounded in detail. In view of the large amount of stress monitoring information in the construction period and operation period of the bridge, and the possible absence phenomenon and the "noise" factor in the signal, the neural network repair method is studied to repair the incomplete data. And the signal denoising technology based on wavelet theory is used to eliminate the noise in monitoring information. (2) from the point of view of stress monitoring, using the concept of strain check coefficient of load test for reference, the envelope evaluation technology of stress check coefficient of large bridge based on monitoring information is put forward. Based on the analysis of live load, temperature, initial stress and other factors, the safety assessment technology of large bridges based on allowable stress envelope is studied. (3) from the point of view of deflection monitoring, combined with the characteristics of deflection monitoring and data envelopment analysis, and referring to the concept of deflection check coefficient of load test, the evaluation technology of deflection check coefficient envelope of large bridges is put forward. Combined with the limit value of allowable deflection in bridge design code, the safety assessment technique of large bridge based on allowable deflection envelope is studied. (4) finally, based on the continuous rigid frame bridge with 240 m main span of Fengdu Longhe Bridge in Chongqing, the rich construction monitoring information and health monitoring information during operation are used. This paper expounds and verifies how to realize the whole life monitoring of large bridge construction and operation period by using the correlation and "relay" of the monitoring information of embedded and surface sticker sensors. At the same time, the safety assessment of the bridge based on stress and deflection monitoring is completed by using the measured data. The comparison and analysis between the evaluation results and the load test results of the bridge show that, The safety assessment technology of bridge based on stress and deflection envelope is feasible in this paper. The whole life monitoring and evaluation technology of continuous rigid frame bridge construction and operation period proposed in this paper has positive practical significance for carrying out the whole life monitoring and evaluation of bridge and ensuring the safety of bridge structure, and has a good prospect of popularization and application.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U446
本文編號：2491475
[Abstract]:The construction monitoring during the bridge construction period and the health monitoring during the operation period play an active role in ensuring the safety of the bridge construction period and the operation period, respectively. At present, the two are often relatively independent, there is no integrated monitoring model, resulting in the integrity of bridge monitoring information, insufficient coherence. On the other hand, bridge health monitoring has a lot of information, and because there are many uncertain factors in material, structure combination, working environment, test signal and so on, there are many uncertain factors in the bridge itself, such as material, structure combination, working environment, test signal and so on. As a result, there is no systematic bridge safety assessment method and technology, which greatly affects the efficiency of bridge health monitoring. Under the above background, this paper takes the continuous rigid frame bridge as the research object, and studies the whole life monitoring model and practical evaluation technology of large bridge construction and operation period. The main research contents are as follows: (1) based on the comparative analysis of the monitoring contents of the construction period and operation period of large bridges and the monitoring projects, the correlation and "relay" of monitoring information by using embedded and surface sensor are used. The concept of whole life monitoring for large bridge construction and operation period is put forward, and the principle, working mode and its advantages of whole life monitoring are expounded in detail. In view of the large amount of stress monitoring information in the construction period and operation period of the bridge, and the possible absence phenomenon and the "noise" factor in the signal, the neural network repair method is studied to repair the incomplete data. And the signal denoising technology based on wavelet theory is used to eliminate the noise in monitoring information. (2) from the point of view of stress monitoring, using the concept of strain check coefficient of load test for reference, the envelope evaluation technology of stress check coefficient of large bridge based on monitoring information is put forward. Based on the analysis of live load, temperature, initial stress and other factors, the safety assessment technology of large bridges based on allowable stress envelope is studied. (3) from the point of view of deflection monitoring, combined with the characteristics of deflection monitoring and data envelopment analysis, and referring to the concept of deflection check coefficient of load test, the evaluation technology of deflection check coefficient envelope of large bridges is put forward. Combined with the limit value of allowable deflection in bridge design code, the safety assessment technique of large bridge based on allowable deflection envelope is studied. (4) finally, based on the continuous rigid frame bridge with 240 m main span of Fengdu Longhe Bridge in Chongqing, the rich construction monitoring information and health monitoring information during operation are used. This paper expounds and verifies how to realize the whole life monitoring of large bridge construction and operation period by using the correlation and "relay" of the monitoring information of embedded and surface sticker sensors. At the same time, the safety assessment of the bridge based on stress and deflection monitoring is completed by using the measured data. The comparison and analysis between the evaluation results and the load test results of the bridge show that, The safety assessment technology of bridge based on stress and deflection envelope is feasible in this paper. The whole life monitoring and evaluation technology of continuous rigid frame bridge construction and operation period proposed in this paper has positive practical significance for carrying out the whole life monitoring and evaluation of bridge and ensuring the safety of bridge structure, and has a good prospect of popularization and application.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U446
【參考文獻】
相關期刊論文 前10條
1 范劍鋒;袁海慶;鐘珞;;不確定層次分析下的橋梁評估最優(yōu)指標權重確定[J];公路交通科技;2007年09期
2 尹仕健;曹映泓;張海明;;湛江海灣大橋健康監(jiān)測系統(tǒng)及其設計[J];中外公路;2006年05期
3 程高;劉永健;周曠;劉世忠;;基于遺傳算法的BP神經(jīng)網(wǎng)絡在橋梁安全評估中的應用[J];世界橋梁;2012年05期
4 翁方文;;意大利墨西拿海峽大橋結構健康監(jiān)測系統(tǒng)[J];世界橋梁;2014年01期
5 涂雪;熊文;肖汝誠;沈旭東;魏樂永;;基于統(tǒng)計理論的橋梁應力趨勢預測與評估方法[J];哈爾濱工業(yè)大學學報;2012年04期
6 胡順仁;陳偉民;符玉梅;;基于神經(jīng)網(wǎng)絡的不可靠數(shù)據(jù)恢復研究[J];計算機仿真;2007年07期
7 李晉芬,王長輝,孫惠樂;太原市空氣污染與兒童醫(yī)院日門診量的相關性研究[J];環(huán)境與職業(yè)醫(yī)學;2003年04期
8 鮑鵬;馬少春;;橋梁結構基于拱桿系失效包絡圖的可視化安全評估[J];河南大學學報(自然科學版);2012年05期
9 周建庭,黃尚廉,王梓夫,董志清;基于可靠度理論的橋梁遠程智能監(jiān)測評價體系研究[J];橋梁建設;2005年03期
10 董學武;張宇峰;徐宏;倪一清;;蘇通大橋結構健康監(jiān)測及安全評價系統(tǒng)簡介[J];橋梁建設;2006年04期
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