本文關(guān)鍵詞： 預(yù)應(yīng)力混凝土 箱梁 主梁應(yīng)力 承載能力 荷載試驗(yàn) ANSYS模型分析　出處：《河北工業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著公路交通事業(yè)的飛速發(fā)展，預(yù)應(yīng)力混凝土箱梁橋在我國(guó)的應(yīng)用也越來(lái)越廣泛。預(yù)應(yīng)力混凝土箱梁橋有跨徑大、正常使用階段結(jié)構(gòu)體系性能良好等優(yōu)點(diǎn)，但由于在正常使用階段橋梁受諸多內(nèi)因及外因影響，箱梁結(jié)構(gòu)體系也會(huì)出現(xiàn)一些病害，影響體系的承載能力。經(jīng)過(guò)專業(yè)人員多年多年觀測(cè)及分析，箱梁橋在恒載、箱梁預(yù)應(yīng)力、溫度應(yīng)力、混凝土收縮徐變、活載應(yīng)力及箱梁主應(yīng)力等的作用下發(fā)生撓曲變形，從而導(dǎo)致其跨中下?lián)虾烷_(kāi)裂。這些因素是否會(huì)使箱梁橋的承載力發(fā)生變化，如何簡(jiǎn)單有效的分析預(yù)應(yīng)力混凝土箱梁承載力的理論變化與實(shí)際變化參數(shù)影響分析是本文研究的主要內(nèi)容。本文考慮了影響混凝土箱梁橋承載力變化的各項(xiàng)荷載參數(shù)，并對(duì)這些參數(shù)的引用做了說(shuō)明，推導(dǎo)了這些參數(shù)的表達(dá)方程，根據(jù)對(duì)對(duì)工程實(shí)例做橋梁靜載及動(dòng)載試驗(yàn)得到的試驗(yàn) 參數(shù)所推導(dǎo)得到的橋梁受力和承載能力與用大型工程軟件ANSYS建立梁?jiǎn)卧Ｐ偷玫降睦碚摲治鼋Y(jié)果加以比較，對(duì)箱梁橋的梁?jiǎn)卧M(jìn)行綜合截面平衡分析，揭示不同影響因素下箱梁橋承載力變化情況。本文對(duì)箱梁橋的靜載及動(dòng)載做了簡(jiǎn)單的介紹，包括了荷載試驗(yàn)的準(zhǔn)備工作、試驗(yàn)方法及實(shí)驗(yàn)數(shù)據(jù)的處理等內(nèi)容。經(jīng)過(guò)對(duì)實(shí)際橋梁檢測(cè)數(shù)據(jù)的處理，得到橋梁在各種加載狀態(tài)下各項(xiàng)試驗(yàn)參數(shù)，用以對(duì)橋梁的承載能力進(jìn)行評(píng)定。同時(shí)，運(yùn)用大型工程軟件ANSYS按照橋梁整體參數(shù)建立橋梁模型，模擬荷載試驗(yàn)的加載方案得到橋梁的理論試驗(yàn)參數(shù)，從而與試驗(yàn)參數(shù)進(jìn)行比較，，研究橋梁在實(shí)際正常使用過(guò)程中恒載、箱梁預(yù)應(yīng)力、溫度應(yīng)力、混凝土收縮徐變、活載應(yīng)力及箱梁主應(yīng)力等對(duì)承載力的影響，近年來(lái)橋梁結(jié)構(gòu)承載能力評(píng)定一直是業(yè)內(nèi)工程師研究的重點(diǎn)，開(kāi)展并完善這一評(píng)定方法也成為可以深入研究的課題，完善橋梁荷載試驗(yàn)并作出橋梁結(jié)構(gòu)性能的正確評(píng)定，能夠更大程度上推動(dòng)我國(guó)橋梁工程的發(fā)展，更精確地挖掘現(xiàn)有橋梁的承載能力潛能。
[Abstract]:With the rapid development of highway transportation, prestressed concrete box girder bridge is more and more widely used in our country. However, due to the influence of many internal and external factors on the bridge during its normal use, there will also be some diseases in the box girder structure system, which will affect the bearing capacity of the system. After many years of observation and analysis by professionals, the box girder bridge is dead and the box girder is prestressing. Under the action of temperature stress, concrete shrinkage and creep, live load stress and main stress of box girder, the flexural deformation occurs, which leads to the deflection and cracking in the middle span of the box girder bridge, and whether these factors will change the bearing capacity of the box girder bridge. How to simply and effectively analyze the influence of theoretical and practical variation parameters on the bearing capacity of prestressed concrete box girder is the main content of this paper. The load parameters affecting the bearing capacity of concrete box girder bridge are considered in this paper. The citation of these parameters is explained, the expression equations of these parameters are deduced, and the test results of bridge static and dynamic load tests for engineering examples are given. Compared with the theoretical analysis results obtained by using the large-scale engineering software ANSYS to establish the beam element model, the comprehensive cross-section balance analysis of the beam element of the box girder bridge is carried out, and the load and bearing capacity of the bridge derived by the parameters are compared with the theoretical analysis results obtained by using the large-scale engineering software ANSYS. This paper briefly introduces the static and dynamic load of box girder bridge, including the preparation of load test. Through the processing of the actual bridge test data, the test parameters of the bridge under various loading conditions are obtained, which can be used to evaluate the bearing capacity of the bridge. The bridge model is established by using the large-scale engineering software ANSYS according to the overall parameters of the bridge. The theoretical test parameters of the bridge are obtained by simulating the loading scheme of the load test, and compared with the experimental parameters, the dead load of the bridge in the actual normal operation process is studied. The influence of box girder prestress, temperature stress, shrinkage and creep of concrete, live load stress and main stress of box girder on the bearing capacity of bridge structure has been the focus of engineering research in recent years. Developing and perfecting this evaluation method has become a subject that can be studied deeply. Perfecting the bridge load test and making the correct evaluation of bridge structure performance can promote the development of bridge engineering in China to a greater extent. More accurately excavate the bearing capacity potential of existing bridges.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441;U448.213

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 胡志偉;;預(yù)應(yīng)力混凝土連續(xù)箱梁橋結(jié)構(gòu)優(yōu)化設(shè)計(jì)[J];工程與建設(shè);2009年02期

2 陳權(quán);王麗娟;張?jiān)?諸昌鈐;;連續(xù)箱梁的日照溫差應(yīng)力計(jì)算研究[J];公路交通科技;2009年08期

3 霍航鷹;關(guān)于連續(xù)箱梁的設(shè)計(jì)探討[J];黑龍江交通科技;2003年06期

4 王全錄;劉保東;張玉梅;;溫度對(duì)混凝土箱梁應(yīng)力和變形影響的測(cè)試與分析[J];武漢理工大學(xué)學(xué)報(bào)(交通科學(xué)與工程版);2008年05期

5 易文;賀國(guó)京;王天鵬;;大跨連續(xù)剛構(gòu)橋應(yīng)力控制研究[J];公路與汽運(yùn);2008年04期

相關(guān)博士學(xué)位論文 前1條

1 王立軍;混凝土強(qiáng)度無(wú)損檢測(cè)試驗(yàn)及人工智能系統(tǒng)模型研究[D];天津大學(xué);2008年

本文編號(hào)：1515879