本文選題：橋梁 + 振動異常　； 參考：《華南理工大學》2014年碩士論文

【摘要】：我國高速公路從上世紀80年代起步建設,至2013年全國高速公路總里程已達到104468km,廣東省目前正在營運的90年代建設通車的”老”高速公路,橋梁或多或少需要進行加固處治以恢復正常使用功能。其中一類嚴重影響高速公路橋梁安全的病害為振動異常,輕則對橋梁重要構件造成疲勞損害,重則造成橋梁垮塌,危害生命財產安全。 高速公路跨河橋梁在營運過程中由于設計缺陷、基礎受沖刷、鋼管樁銹蝕、超重車輛荷載等因素會出現振動異常的情況,如何對振動異常進行正確的分析以及制定相應的處治方式是一個值得探討的問題。正確的分析可以為處治方案提供依據,恰當的處治方式可以減少工程費用、減少對高速公路正常營運的影響。 本文主要針對廣東某T構橋梁振動異常的問題,先通過外觀以及水下樁基檢測,排除了結構病害導致了振動異常的發(fā)生,在利用有限元軟件建立模型并且計算該橋梁的理論振動特性,根據實際振動情況與理論振動特性比較,結果另一座振動正常的同結構橋梁進行對比,從而分析出橋梁振動異常的主要原因。并根據實際情況,在目前較為流行的幾種加固處治技術通過比選,最終選擇最佳的處治方式。本文在實際應用中有一定的價值,可以作為同類情況處理的參考。
[Abstract]:Since the beginning of expressway construction in the 1980s, the total mileage of expressway in China has reached 104468km in 2013. The "old" expressway, which is being built and opened to traffic in the 1990s in Guangdong Province, has been built and opened to traffic in the 1990s. Bridges more or less need to be strengthened to restore normal use. One of the diseases which seriously affects the safety of expressway bridges is vibration anomaly, which causes fatigue damage to important components of bridges, collapse of bridges and endangering the safety of life and property. Due to design defects, erosion of foundation, corrosion of steel pipe piles and overload of vehicles, abnormal vibration will occur during the operation of highway bridge beams. It is worth discussing how to analyze vibration anomaly correctly and how to make corresponding treatment methods. The correct analysis can provide the basis for the treatment scheme, and the proper treatment method can reduce the project cost and reduce the impact on the normal operation of the highway. In this paper, aiming at the problem of vibration anomaly of a T bridge in Guangdong province, the vibration anomaly is eliminated by detecting the appearance and underwater pile foundation. The finite element software is used to establish the model and calculate the theoretical vibration characteristics of the bridge. According to the actual vibration and the theoretical vibration characteristics, the results of another bridge with normal vibration are compared. The main causes of bridge vibration anomalies are analyzed. According to the actual situation, the best treatment method is chosen through comparison and selection of several reinforcement and treatment techniques that are popular at present. This paper has some value in practical application and can be used as a reference for similar cases.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U441.3

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本文編號：1897869