大跨度連續(xù)箱型公路橋梁承載力評估方法研究
[Abstract]:The continuous beam bridge is widely used in highway bridges because of its large structural stiffness and small deformation, which greatly reduces the number of expansion joints compared with the simple beam bridge, and the smooth driving and good seismic performance of the continuous beam bridge. However, in recent years, the phenomenon of overloading frequently occurs and becomes more and more serious, overloading has caused many adverse effects on bridges. Because of excessive vibration and impact, cracks develop rapidly. In the long run, cumulative damage will greatly reduce the bearing capacity of bridge structures. Shorten the normal service life, easy to cause the occurrence of the traffic accident. Therefore, it is necessary to evaluate the bearing capacity of bridges quickly and accurately. Based on the research background of a long-span continuous box girder bridge, this paper analyzes and compares the evaluation methods of the bearing capacity of a long-span continuous box girder bridge. Firstly, the actual bearing capacity of the bridge is calculated with the method of appearance inspection and criterion evaluation, and the Midas Civil model is established to modify the model according to the results of static load test, to calculate the modified bearing capacity of the bridge, and to deduce the residual bearing capacity. The results of bearing capacity evaluation based on bridge inspection and code calculation are compared with those based on load test. According to the test results of dynamic load, the dynamic response and modal parameters (frequency and mode shape) of the bridge are analyzed and the bearing capacity of the bridge is evaluated. Finally, the bridge health monitoring is carried out, combined with the results of finite element analysis, the safety alarm value is provided, and the carrying capacity of the bridge is evaluated according to the health monitoring data. The results show that it is feasible to compare and analyze the long-span continuous box girder bridge based on the comprehensive evaluation method of the bearing capacity of the bridge in service, and the mechanical performance (including stiffness and bearing capacity) of the bridge is evaluated. The evaluation results meet the requirements of the code and provide reference basis for similar bridge engineering, which has the value of popularization and application.
【學(xué)位授予單位】:石家莊鐵道大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:U441;U446
【相似文獻】
相關(guān)期刊論文 前10條
1 呂穎釗,賀拴海;在役橋梁承載力模糊可靠性的馬爾科夫預(yù)測[J];長安大學(xué)學(xué)報(自然科學(xué)版);2005年04期
2 周建庭;評定橋梁承載力強度和剛度指標間的互換關(guān)系[J];重慶交通學(xué)院學(xué)報;1997年04期
3 潘志強,丁乃慶;橋梁承載力評定方法的探討[J];水道港口;2004年01期
4 閆磊;趙勃;呂穎釗;任偉;張崗;;基于可靠性的在役橋梁承載力評價[J];西安建筑科技大學(xué)學(xué)報(自然科學(xué)版);2010年03期
5 肖盛燮,彭凱,繆吉倫,王家林;橋梁承載力演變理論及其應(yīng)用技術(shù)梗概[J];重慶交通學(xué)院學(xué)報;2004年06期
6 李聞濤;;既有橋梁承載力動力評估方法綜述[J];交通標準化;2007年04期
7 陸新征;張炎圣;黃盛楠;董春;;基于非線性有限元和快速建模的橋梁承載力預(yù)測[J];蘭州交通大學(xué)學(xué)報;2009年04期
8 肖盛燮,彭凱,曾小剛,朱增輝;橋梁承載力演變理論應(yīng)用體系格構(gòu)[J];重慶交通學(xué)院學(xué)報;2004年06期
9 張瑞云,曹雙寅;基于材料性能動態(tài)變化的某混凝土橋梁承載力分析[J];石家莊鐵道學(xué)院學(xué)報;2004年02期
10 陰忠祥;周峰;;淺談橋梁承載力評價[J];黑龍江交通科技;2009年03期
相關(guān)會議論文 前3條
1 沈大元;強士中;武守信;裴亞玲;;既有橋梁承載力評定的方法[A];全國橋梁結(jié)構(gòu)學(xué)術(shù)大會論文集(下冊)[C];1992年
2 王草;李全旺;李連友;;結(jié)構(gòu)劣化對在役橋梁承載力更新的影響[A];第22屆全國結(jié)構(gòu)工程學(xué)術(shù)會議論文集第Ⅲ冊[C];2013年
3 李東森;;論公路橋梁承載力鑒定整體檢測技術(shù)[A];2013年4月建筑科技與管理學(xué)術(shù)交流會論文集[C];2013年
相關(guān)重要報紙文章 前1條
1 記者 張配吉 通訊員 黃建庭;廣東4000多座橋梁承載力不足需加固[N];廣東建設(shè)報;2000年
相關(guān)碩士學(xué)位論文 前9條
1 鄭冰;大跨度連續(xù)箱型公路橋梁承載力評估方法研究[D];石家莊鐵道大學(xué);2015年
2 沈浩;橋梁承載力時變規(guī)律研究[D];長安大學(xué);2011年
3 鐘曙亮;公路既有橋梁承載力評定方法研究[D];西南交通大學(xué);2010年
4 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
5 李治國;服役RC橋梁承載力可靠度評估研究[D];遼寧工程技術(shù)大學(xué);2008年
6 周江;高等級公路橋梁健康狀況評估方法的研究[D];長安大學(xué);2003年
7 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
8 馬新勇;中、小跨徑混凝土橋梁承載力評定指標計算分析研究[D];長安大學(xué);2009年
9 李雯雯;既有PC橋梁損傷演化及對承載能力影響的研究[D];重慶交通大學(xué);2013年
,本文編號:2462237
本文鏈接:http://sikaile.net/kejilunwen/daoluqiaoliang/2462237.html