連續(xù)剛構(gòu)大橋建設(shè)—營(yíng)運(yùn)期全壽命監(jiān)測(cè)與評(píng)估技術(shù)
發(fā)布時(shí)間：2019-06-02 22:49
【摘要】：橋梁建設(shè)期的施工監(jiān)控和營(yíng)運(yùn)期的健康監(jiān)測(cè)分別對(duì)橋梁建設(shè)期和營(yíng)運(yùn)期的安全起積極的保障作用。目前這兩者往往相對(duì)獨(dú)立、沒(méi)有形成一體化的監(jiān)測(cè)模式,造成了橋梁監(jiān)測(cè)信息的完整性、連貫性不足。另一方面,橋梁健康監(jiān)測(cè)具有海量信息,而且由于橋梁本身存在材料、結(jié)構(gòu)組合、工作環(huán)境、測(cè)試信號(hào)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(píng)估方法和技術(shù),大大影響了橋梁健康監(jiān)測(cè)效率。在上述背景下,本論文以連續(xù)剛構(gòu)大橋?yàn)檠芯繉?duì)象,針對(duì)大型橋梁建設(shè)—營(yíng)運(yùn)期全壽命監(jiān)測(cè)模式與實(shí)用化評(píng)估技術(shù)展開(kāi)研究,主要研究?jī)?nèi)容包括： ①在對(duì)比分析大型橋梁建設(shè)期和營(yíng)運(yùn)期監(jiān)測(cè)內(nèi)容、監(jiān)測(cè)項(xiàng)目的基礎(chǔ)上,利用預(yù)埋—表貼傳感器監(jiān)測(cè)信息的相關(guān)性和“接力”,提出了大型橋梁建設(shè)—營(yíng)運(yùn)期全壽命監(jiān)測(cè)的理念,并具體闡述了全壽命監(jiān)測(cè)的原理、工作模式及它的優(yōu)勢(shì)；針對(duì)橋梁在建設(shè)期和營(yíng)運(yùn)期的應(yīng)力監(jiān)測(cè)信息量龐大,且可能存在缺失現(xiàn)象以及信號(hào)含有“噪聲”因素的問(wèn)題,研究了采用神經(jīng)網(wǎng)絡(luò)修復(fù)法對(duì)殘缺數(shù)據(jù)進(jìn)行修復(fù),以及采用基于小波理論的信號(hào)消噪技術(shù)對(duì)監(jiān)測(cè)信息中的“噪聲”進(jìn)行消除處理的相關(guān)技術(shù)。 ②從應(yīng)力監(jiān)測(cè)角度出發(fā),借鑒荷載試驗(yàn)應(yīng)變校驗(yàn)系數(shù)的概念,提出了大型橋梁基于監(jiān)測(cè)信息的應(yīng)力校驗(yàn)系數(shù)包絡(luò)評(píng)估技術(shù)；在分析活載、溫度、初始應(yīng)力等因素的基礎(chǔ)上,研究了大型橋梁基于容許應(yīng)力包絡(luò)的安全評(píng)估技術(shù)。 ③從撓度監(jiān)測(cè)角度出發(fā),結(jié)合撓度監(jiān)測(cè)和數(shù)據(jù)包絡(luò)分析的特點(diǎn),借鑒荷載試驗(yàn)撓度校驗(yàn)系數(shù)的概念,提出了大型橋梁基于撓度校驗(yàn)系數(shù)包絡(luò)的評(píng)估技術(shù)；結(jié)合橋梁設(shè)計(jì)規(guī)范中關(guān)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(luò)的安全評(píng)估技術(shù)。 ④最后以重慶豐都龍河特大橋—主跨240m的連續(xù)剛構(gòu)大橋?yàn)橐劳泄こ?利用豐富的建設(shè)期施工監(jiān)控信息和營(yíng)運(yùn)期健康監(jiān)測(cè)信息,具體闡述和驗(yàn)證了如何利用預(yù)埋—表貼傳感器監(jiān)測(cè)信息的相關(guān)性和“接力”,實(shí)現(xiàn)大型橋梁建設(shè)—營(yíng)運(yùn)期的全壽命監(jiān)測(cè)；同時(shí),利用實(shí)測(cè)數(shù)據(jù),完成了該大橋基于應(yīng)力和撓度監(jiān)測(cè)的安全評(píng)估,該評(píng)估結(jié)果與大橋荷載試驗(yàn)檢測(cè)結(jié)果對(duì)比分析表明,本文提出的基于應(yīng)力和撓度“包絡(luò)”的大橋安全評(píng)估技術(shù)是可行的。 本文提出的連續(xù)剛構(gòu)大橋建設(shè)—營(yíng)運(yùn)期全壽命監(jiān)測(cè)與評(píng)估技術(shù),對(duì)實(shí)施橋梁的全壽命監(jiān)測(cè)與評(píng)估、保證橋梁結(jié)構(gòu)安全具有積極的現(xiàn)實(shí)意義,具有良好的推廣應(yīng)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(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U446
本文編號(hào)：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(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U446
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，本文編號(hào)：2491475
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