【摘要】：近幾十年來，我國橋梁正隨著經(jīng)濟(jì)的繁榮而迅猛的發(fā)展，尤其是對于大跨徑橋梁來說，更是一個輝煌的時期。這其中，鋼管混凝土拱橋就占有不小的比例，這類結(jié)構(gòu)新穎、技術(shù)復(fù)雜、設(shè)計施工難度大、科技含量高。吊桿是鋼管混凝土拱橋重要的受力構(gòu)件，國內(nèi)外一些中、下承式鋼管混凝土拱橋的垮塌事故大多與吊桿的健康狀態(tài)有關(guān)，定期了解吊桿的受力狀況是判斷鋼管混凝土拱橋是否處于正常工作狀態(tài)的重要依據(jù)。吊桿索力作為整座橋梁施工和后期橋梁養(yǎng)護(hù)管理與健康監(jiān)測最重要的指標(biāo)，長久以來得到了廣大研究學(xué)者的廣泛關(guān)注。所以如何識別吊桿的受力情況，特別是短吊桿的受力情況，，如何對多年使用吊桿健康狀況進(jìn)行評估，如何對橋梁結(jié)構(gòu)即將出現(xiàn)的病變進(jìn)行準(zhǔn)確的預(yù)測等問題，是擺在吊桿索力識別領(lǐng)域的一個重要課題。只有高效準(zhǔn)確的識別吊桿索力，盡早發(fā)現(xiàn)橋梁問題，才能避免對國家經(jīng)濟(jì)財產(chǎn)造成損失，才能避免對無辜群眾造成傷害。 本文研究內(nèi)容主要分為五大部分：第一部分為吊桿索力識別的研究現(xiàn)狀以及各種識別方法的優(yōu)劣，并介紹了吊桿施工索力優(yōu)化的常用方法；第二部分為頻率法對吊桿索力識別的現(xiàn)狀及其應(yīng)用于吊桿的不足；第三部分基于APDL的ANSYS有限元優(yōu)化技術(shù)，對吊桿進(jìn)行參數(shù)化建模，研究了吊桿自身結(jié)構(gòu)參數(shù)靈敏度的問題，并對吊桿索力進(jìn)行優(yōu)化分析，為后期索力識別軟件的開發(fā)打下理論基礎(chǔ)；第四部分結(jié)合沙河特大橋MIDAS有限元模型，對吊桿成橋索力及初始張拉力進(jìn)行了優(yōu)化分析，研究了該橋在施工及成橋狀態(tài)結(jié)構(gòu)應(yīng)力及位移，分析了最優(yōu)施工順序；第五部分主要應(yīng)用開發(fā)的索力識別軟件對沙河特大橋吊桿索力進(jìn)行實橋分析，表明該系統(tǒng)能夠?qū)ι澈犹卮髽虻鯒U受力情況進(jìn)行準(zhǔn)確有效的識別，進(jìn)一步提高了吊桿索力識別的精度。
[Abstract]:In recent decades, bridges in China are developing rapidly with the prosperity of economy, especially for long-span bridges, which is a glorious period. Among them, concrete filled steel tube arch bridge occupies a large proportion, this kind of structure is novel, the technology is complex, the design and construction is difficult, the science and technology content is high. Suspension rod is an important force member of CFST arch bridge. In some of the domestic and foreign, the through concrete filled steel tubular arch bridge collapse accident is mostly related to the health state of the suspender. It is an important basis to judge whether the CFST arch bridge is in normal working condition. As the most important index of the whole bridge construction and the maintenance management and health monitoring of the bridge, the cable force of the suspension rod has been widely concerned by many researchers for a long time. So how to identify the stress of the suspenders, especially the stress of the short suspenders, how to evaluate the health status of the suspenders used for many years, how to accurately predict the damage of the bridge structure, etc. It is an important subject in the field of cable force identification. Only by identifying the cable force of the suspenders efficiently and accurately and finding the bridge problem as soon as possible can we avoid the loss of the national economic property and the injury to the innocent people. The main contents of this paper are divided into five parts: the first part is the research status of cable force identification and the advantages and disadvantages of various identification methods, and introduces the common methods of cable force optimization in construction; The second part is the current situation of the frequency method for the cable force identification and the shortage of its application to the suspension rod. The third part is based on the ANSYS finite element optimization technology of APDL to model the suspension rod parameterized, and studies the sensitivity of the structure parameter of the suspender itself. The cable force of the suspension rod is optimized and analyzed, which lays a theoretical foundation for the development of the cable force identification software in the later stage. The fourth part combines with the MIDAS finite element model of Shahe Bridge to optimize the cable force and the initial tension force of the suspender bridge. The stress and displacement of the bridge in the construction and the state of the bridge are studied, and the optimal construction sequence is analyzed. In the fifth part, the cable force identification software is mainly used to analyze the cable force of the suspension rod of the Shahe super bridge. The results show that the system can recognize the force of suspension rod accurately and effectively, and improve the precision of cable force recognition.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.4;U448.22

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