本文選題：軌道斜拉橋 + 線形控制��； 參考：《重慶交通大學》2014年碩士論文

【摘要】：隨著軌道交通事業(yè)的迅速發(fā)展,用于軌道交通的大跨度軌道斜拉橋日趨增多。大跨徑軌道斜拉橋合理線形是保證運營期行車舒適性、耐久性甚至安全性的重要方面�；炷潦湛s徐變效應屬于長期效應,車橋耦合效應屬于短期效應,但無論哪種效應都是影響軌道斜拉橋合理線形控制的重要因素,并且這兩種效應至今未被完全掌握,橋梁合理線形控制方面也未形成統(tǒng)一的、明確的理論和規(guī)范。因此,本文重點對基于收縮徐變效應和車橋耦合效應的合理線形控制關(guān)鍵技術(shù)進行研究,通過研究旨在找到合理的收縮徐變模型,找到車橋耦合效應與線形控制的關(guān)系,找到合理的軌道橋梁合理線形控制方法,為今后同類橋梁線形控制方法的進一步研究及實橋應用提供一定的依據(jù)。本文研究的主要內(nèi)容和結(jié)論包括：①在對混凝土收縮徐變效應各模型和計算方法闡述的基礎(chǔ)上,結(jié)合實測環(huán)境濕度、實測環(huán)境溫度和實際材料情況,得到了收縮徐變效應的合理預測模型(CEB-FIB90)和合適計算方法。通過大跨軌道斜拉橋混凝土收縮徐變效應的有限元模型計算和實測數(shù)據(jù)分析表明混凝土收縮徐變效應的實測值與模型預測值相差2cm以內(nèi),從而實現(xiàn)對采用的模型的分析與驗證；②對列車-軌道-橋梁耦合作用的模型、相互作用、運動方程分析后,結(jié)合實橋的動載試驗數(shù)據(jù),對大跨軌道斜拉橋的動力響應及動力特性指標進行了分析。得到了主橋跨中處最大動位移和最大靜位移之比,依據(jù)該比值得到了車橋耦合效應與預拱度設(shè)置(線形控制)之間的定量關(guān)系；③通過狀態(tài)轉(zhuǎn)移矩陣和預拱度的表達式得到了考慮混凝土收縮徐變和車橋耦合效應的卡爾曼濾波線形控制方法。采用MATLAB數(shù)學分析軟件對實橋進行編程計算,得到了實橋線形控制的預測值。實橋預拱度和線形的計算值、實測值與預測值的對比分析表明基于混凝土收縮徐變和車橋耦合效應的卡爾曼濾波線形控制方法對大跨軌道斜拉橋合理線形控制效果良好；⑤完成了亞洲第一、世界第二大軌道斜拉橋合理線形控制的分析,驗證了上述采用的收縮徐變模型的可靠性,分析了車橋耦合效應對線形控制的影響,分析和驗證了考慮混凝土收縮徐變和車橋耦合效應的卡爾曼濾波線形控制方法。
[Abstract]:With the rapid development of rail transportation, the number of long span track cable-stayed bridges used in rail transit is increasing day by day.The reasonable alignment of long span track cable-stayed bridge is an important aspect to ensure the ride comfort, durability and even safety of long span track cable-stayed bridge.Concrete shrinkage and creep effect belong to long-term effect, vehicle-bridge coupling effect belongs to short-term effect, but no matter which kind of effect is the important factor that affects the rational linear control of track cable-stayed bridge, and these two effects have not been fully grasped up to now.There is also no unified, definite theory and standard for the rational linear control of bridges.Therefore, the key technology of linear control based on shrinkage and creep effect and vehicle-bridge coupling effect is studied in this paper. The purpose of this study is to find out a reasonable model of shrinkage and creep, and to find out the relationship between the coupling effect of vehicle and bridge and the linear control.A reasonable linear control method for railway bridges is found, which provides a basis for the further study of similar bridge alignment control methods and the application of real bridges in the future.The main contents and conclusions of this paper include: on the basis of expounding the models and calculation methods of shrinkage and creep effect of concrete, combining with the measured environmental humidity, the measured environmental temperature and the actual material situation,A reasonable prediction model of shrinkage and creep effect, CEB-FIB90, and a suitable calculation method are obtained.Through the finite element model calculation of concrete shrinkage and creep effect of long-span cable-stayed bridge and the analysis of measured data, it is shown that the measured value of concrete shrinkage and creep effect is less than the predicted value of the model 2cm, so that the analysis and verification of the adopted model can be realized.(2) the dynamic response and dynamic characteristics of long span track cable-stayed bridge are analyzed based on the model of train track bridge coupling, the interaction and the equation of motion, and the dynamic load test data of real bridge.The ratio of the maximum dynamic displacement to the maximum static displacement in the middle of the main bridge span is obtained, and the quantitative relationship between the coupling effect of the vehicle and bridge and the setting of the pre-arch degree (linear control) is obtained according to the ratio.(3) through the expressions of state transfer matrix and pre-camber, the Kalman filter linear control method considering concrete shrinkage and creep and vehicle-bridge coupling effect is obtained.The programming calculation of real bridge is carried out by using MATLAB mathematical analysis software, and the predicted value of real bridge linear control is obtained.The comparison and analysis of the calculated values, measured values and predicted values of the pre-camber and alignment of the real bridge show that the Kalman filter linear control method based on concrete shrinkage and creep and vehicle-bridge coupling effect has a good effect on the reasonable linear control of long-span cable-stayed bridge.5. The reasonable linear control of the first and second largest track cable-stayed bridges in Asia and the world is analyzed. The reliability of the above-mentioned shrinkage and creep model is verified, and the influence of vehicle-bridge coupling effect on the linear control is analyzed.The Kalman filter linear control method considering concrete shrinkage and creep and vehicle-bridge coupling effect is analyzed and validated.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.4

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本文編號：1762858