【摘要】：伴隨著我國交通物流的快速發(fā)展,應(yīng)用最為廣泛的混凝土梁式橋出現(xiàn)了越來越多的病害。及時發(fā)現(xiàn)橋梁病害,防止橋梁的安全性能進一步退化并及時進行維修加固,對既有橋梁進行安全性能快速評估就顯得尤為重要。本文以沈海高速(G15)江蘇段烈士河大橋為工程背景,主要進行的工作如下：(1)建立烈士河大橋健康監(jiān)測系統(tǒng),并對系統(tǒng)采集到的數(shù)據(jù)進行了系統(tǒng)的分析。(2)基于環(huán)境振動試驗的結(jié)果,對烈士河大橋初始有限元模型進行了修正,建立了能夠反映烈士河大橋?qū)嶋H運營狀態(tài)的基準有限元模型,進而為烈士河大橋建立安全評估的閾值。(3)基于不確定層次分析法、群判斷、集值統(tǒng)計原理、變權(quán)綜合以及熵值法等理論建立了烈士河大橋安全評估模型,自行開發(fā)了橋梁安全綜合性能評估軟件,并使用該軟件對烈士河大橋進行了安全評估。(4)推導(dǎo)了兩跨連續(xù)梁橋的撓度影響線及其一、二階導(dǎo)數(shù)的表達式,建立了基于撓度影響線的橋梁承載力初步評定方法,并進行了算例驗證。(5)應(yīng)用常丁Ar—η回歸模型和在線健康監(jiān)測系統(tǒng)的實測數(shù)據(jù),研究了動撓度影響線與實時車輛荷載相結(jié)合的橋梁承載力快速評定方法,并采用該方法對烈士河大橋進行承載力評估。得到的主要結(jié)論如下：(1)烈士河大橋結(jié)構(gòu)健康監(jiān)測系統(tǒng)具有功能完整性、維修養(yǎng)護方便性、先進實用性等特點,監(jiān)測結(jié)果符合部分預(yù)應(yīng)力混凝土連續(xù)梁橋的基本力學(xué)行為,達到了健康監(jiān)測系統(tǒng)設(shè)計的基本要求,可為烈士河大橋安全評估的研究提供有力支撐。(2)基于環(huán)境振動試驗和三階響應(yīng)面方法,進行了烈士河大橋有限元模型修正,計算模態(tài)與實測模態(tài)吻合較好,修正后的烈士河大橋有限元模型可作為烈士河大橋安全評估的基準有限元模型。(3)建立了烈士河大橋安全綜合評估模型,開發(fā)了基于Matlab的安全綜合評估軟件；烈士河大橋7個月安全評估平均得分為89.3分,表明烈士河大橋大橋安全狀況良好。(4)建立了基于撓度影響線的橋梁承載力初步評定方法,可以用于橋梁損傷識別和承載力評估。(5)基于實時監(jiān)測和基于動撓度影響線的在線模型修正方法,建立了烈士河大橋極限承載力的快速評估方法。評估結(jié)果表明：烈士河大橋處于安全的工作性能狀態(tài),極限承載力安全系數(shù)在3.5以上。
[Abstract]:With the rapid development of transportation logistics in China, more and more diseases appear in the most widely used concrete beam bridges. It is very important to find the bridge diseases in time to prevent the safety performance of the bridge from degenerating further and to carry on the maintenance and reinforcement in time. So it is very important to evaluate the safety performance of the existing bridges quickly. The main work of this paper is as follows: (1) establish the health monitoring system of the Shenhai Highway (G15) Martyrs River Bridge in Jiangsu Province, the main work of this paper is as follows: (1) establish the Health Monitoring system of the Martyrs River Bridge. And the data collected by the system are systematically analyzed. (2) based on the results of the environmental vibration test, the initial finite element model of the Martyrs River Bridge is modified, and the benchmark finite element model which can reflect the actual operation state of the Martyr River Bridge is established. Then the threshold value of safety assessment is established for the Martyrs River Bridge. (3) based on the theory of uncertain Analytic hierarchy process (AHP), group judgment, set value statistics principle, variable weight synthesis and entropy method, the safety assessment model of Martyrs River Bridge is established. The comprehensive performance evaluation software for bridge safety is developed, and the safety evaluation of the Martyr River Bridge is carried out by using the software. (4) the expressions of the deflection influence line and the first and second derivative of the two-span continuous beam bridge are derived. A preliminary evaluation method of bridge bearing capacity based on deflection influence line is established, and an example is given to verify it. (5) the Ar- 畏 regression model of Changding and the measured data of on-line health monitoring system are used. In this paper, the rapid evaluation method of bridge bearing capacity combined with dynamic deflection influence line and real time vehicle load is studied, and the method is used to evaluate the bearing capacity of the Martyr River Bridge. The main conclusions are as follows: (1) the structural health monitoring system of the Martyrs River Bridge has the characteristics of functional integrity, convenient maintenance, advanced practicability and so on. The monitoring results accord with the basic mechanical behavior of partially prestressed concrete continuous beam bridge. It meets the basic requirements of the health monitoring system design and can provide a strong support for the study of the safety assessment of the Martyrs River Bridge. (2) based on the environmental vibration test and the third order response surface method, the finite element model of the Martyrs River Bridge is modified. The modified finite element model of the Martyrs River Bridge can be used as the benchmark finite element model for the safety assessment of the Martyrs River Bridge. (3) the comprehensive safety assessment model of the Martyrs River Bridge is established. The software of comprehensive safety assessment based on Matlab is developed, and the average score of safety assessment for the Martyrs River Bridge in 7 months is 89.3, which indicates that the safety condition of the Bridge is good. (4) A preliminary assessment method of bridge bearing capacity based on deflection influence line is established. It can be used to identify the damage and evaluate the bearing capacity of bridges. (5) based on real-time monitoring and on-line model modification method based on dynamic deflection influence line, a fast evaluation method for ultimate bearing capacity of Martyr River Bridge is established. The evaluation results show that the Martyrs River Bridge is in a safe working condition and the safety factor of ultimate bearing capacity is above 3.5.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U446

【參考文獻】

相關(guān)期刊論文 前10條

1 朱金華;艾軍;蔡晨寧;于超凡;;基于結(jié)構(gòu)檢算方法的梁式橋梁結(jié)構(gòu)快速安全性綜合評估系統(tǒng)[J];交通運輸研究;2015年05期

2 王儀;王春陽;代彥輝;張?zhí)熘?譚靜遠;;多跨連續(xù)橋梁位移響應(yīng)的動態(tài)影響線方法研究[J];河南城建學(xué)院學(xué)報;2013年06期

3 鄭建交;;《公路橋梁技術(shù)狀況評定標準》(JTGTH21-2011)與04版橋涵養(yǎng)護規(guī)范的差異與不同[J];中國水運(下半月);2012年11期

4 劉軍營;任偉;楊文濤;;基于G_1法的在役混凝土梁橋技術(shù)狀態(tài)并行綜合評定[J];青島理工大學(xué)學(xué)報;2012年04期

5 陶鵬;艾軍;羅韌;王東;楊晉;;橋梁結(jié)構(gòu)快速評估方法的研究與軟件實現(xiàn)[J];公路交通科技;2012年01期

6 何雄君;李季;;預(yù)應(yīng)力混凝土梁橋系統(tǒng)失效樹分析[J];工程力學(xué);2009年01期

7 張文獻;劉心亮;羅冰;李明光;;通過裂縫特征快速評估橋梁承載能力的試驗研究[J];東北大學(xué)學(xué)報(自然科學(xué)版);2008年09期

8 黃僑;任遠;林陽子;;大跨徑橋梁綜合評估中的不確定型層次分析法[J];公路交通科技;2008年03期

9 伍華成;項貽強;楊萬里;;基于神經(jīng)網(wǎng)絡(luò)的模糊理論在橋梁狀態(tài)評估中的應(yīng)用[J];后勤工程學(xué)院學(xué)報;2007年01期

10 秦健;孫立軍;;瀝青路面溫度場的分布規(guī)律[J];公路交通科技;2006年08期

相關(guān)博士學(xué)位論文 前1條

1 焦峪波;不確定條件下橋梁結(jié)構(gòu)損傷識別及狀態(tài)評估的模糊計算方法研究[D];吉林大學(xué);2012年

相關(guān)碩士學(xué)位論文 前10條

1 王維康;基于層次分析法和模糊理論的矮塔斜拉橋狀態(tài)綜合評估[D];長安大學(xué);2014年

2 劉歡;基于荷載試驗的橋梁結(jié)構(gòu)安全性檢測與評估研究[D];西華大學(xué);2013年

3 劉戰(zhàn);基于運營荷載在役橋梁承載力可靠度評估[D];長安大學(xué);2013年

4 于海鋒;基于模糊神經(jīng)網(wǎng)絡(luò)的在役鋼筋混凝土橋梁耐久性評估方法研究[D];吉林大學(xué);2013年

5 魏[?;基于可靠度理論的既有橋梁承載力評估[D];西南交通大學(xué);2012年

6 吳建輝;既有橋梁可靠度評估關(guān)鍵問題研究[D];天津大學(xué);2012年

7 欒坤鵬;既有混凝土斜拉橋健康監(jiān)測評估方法的研究[D];重慶交通大學(xué);2011年

8 常丁;基于輕荷載試驗梁橋承載力快速評定研究[D];長安大學(xué);2010年

9 辛保兵;既有預(yù)應(yīng)力混凝土梁橋剩余承載力評估方法研究[D];鄭州大學(xué);2010年

10 藍勇;高寒地區(qū)橋梁承載力快速評估技術(shù)[D];重慶交通大學(xué);2010年

，

本文編號：2121275