【摘要】：我國在改革開放以后，修建了大量的橋梁，由于當(dāng)時的設(shè)計荷載等級和施工技術(shù)與現(xiàn)在相比差距較大，這些橋梁承載力或運營情況已不能滿足現(xiàn)在交通運輸業(yè)的發(fā)展需求，隨著時間的增長，加上自然災(zāi)害和交通事故的侵襲，其結(jié)構(gòu)老化是不可避免的，如果不及時進行養(yǎng)護與維修加固，橋梁構(gòu)件的損傷程度就會越來越嚴(yán)重，損壞數(shù)量也會越來越多，，最終可能發(fā)生橋梁局部構(gòu)件損壞或整體破壞，所以進行合理的橋梁檢測與維修加固已成為橋梁安全運營的重要前提。 本文主要的研究內(nèi)容為總結(jié)T型梁橋破壞原因及國內(nèi)外現(xiàn)有T型梁橋研究狀況；闡述了鋼筋混凝土T型梁橋的檢測評估方法，并以太子河大橋為工程背景，分別對橋梁的整體及其組成部分進行檢測，對其病害情況、損傷程度、實有承載能力、以及是否能滿足正常運營情況等做出鑒定，針對太子河大橋存在的病害狀況分析其產(chǎn)生原因，結(jié)合鋼筋混凝土T型梁橋常用的加固方案和方案選用原則，確定太子河大橋需要采取的維修加固的方案，為綜合運用增大截面法和改變結(jié)構(gòu)體系法的加固方案，實施加固方案后，采用有限元計算和荷載試驗兩種方法來確定其加固后的效果，檢測橋梁加固后橋梁變形和承載能力與加固之前的差異，從而判斷橋梁加固技術(shù)的實際效果，最終得出Midas模擬計算與實際檢測情況很接近，太子河大橋的加固方案設(shè)計合理，達到加固的目的，但本論文的模擬分析未考慮溫度荷載，風(fēng)荷載等，荷載試驗車的布置考慮還不全面，所以還需更精確的研究并為類似工程提供依據(jù)。
[Abstract]:After the reform and opening up, a large number of bridges have been built in our country. Because of the large gap between the design load grade and construction technology at that time, the carrying capacity or operation of these bridges can no longer meet the development needs of the transportation industry. With the increase of time and the attack of natural disasters and traffic accidents, the aging of the structure is inevitable. If the maintenance and repair are not carried out in time, the damage degree of the bridge members will become more and more serious. The number of damage will be more and more, and the local component damage or the whole damage may occur eventually, so it has become an important prerequisite for bridge safety operation to carry out reasonable bridge detection and maintenance and reinforcement. The main research content of this paper is to summarize the failure reason of T-beam bridge and the current research situation of T-beam bridge at home and abroad. This paper expounds the detection and evaluation method of reinforced concrete T-type girder bridge, and taking the Qianghe Bridge as the engineering background, tests the whole bridge and its components respectively, and analyzes the disease situation, damage degree and bearing capacity of the bridge. And whether it can meet the normal operation conditions and so on to make the appraisal, according to the Qizaihe River Bridge existence disease condition analysis its occurrence reason, unifies the reinforced concrete T-beam bridge commonly used reinforcement plan and the plan choice principle, To determine the maintenance and reinforcement scheme to be adopted for Qianghehe Bridge, in order to comprehensively use the method of increasing section and changing the structural system, after the implementation of the reinforcement scheme, The finite element calculation and load test are used to determine the effect of the strengthened bridge, and the difference between the deformation and bearing capacity of the strengthened bridge and that of the strengthened bridge is detected, so as to judge the practical effect of the bridge strengthening technology. Finally, it is concluded that the Midas simulation calculation is very close to the actual inspection situation, and the reinforcement scheme of Taixinghe Bridge is reasonable, and the purpose of reinforcement is achieved. However, the simulation analysis of this paper does not consider temperature load, wind load and so on. The layout of the load test vehicle is not comprehensive, so it is necessary to study more accurately and provide the basis for similar projects.
【學(xué)位授予單位】：遼寧科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.72

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