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  本文選題：舊橋加固　切入點：技術(shù)狀況評定　出處：《大連理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：過去的數(shù)十年里,本國的經(jīng)濟水平發(fā)展速度迅猛。相應(yīng)的,交通運輸量和汽車的荷載也在大幅增加,很多橋梁都出現(xiàn)了不同程度的損傷。對這些舊橋進行加固,使其能繼續(xù)為公共交通服務(wù)已成為當(dāng)下亟需解決的問題。本文結(jié)合大連勝利橋的加固實例,主要研究了以下幾方面內(nèi)容： (1)對該橋進行詳盡的現(xiàn)場檢測,通過對橋面系、上部結(jié)構(gòu)、下部結(jié)構(gòu)和橋面裝飾的檢測給出具體的檢測結(jié)果；通過檢測結(jié)果對橋梁相應(yīng)的部分進行橋體技術(shù)狀況的評定,進而得出橋梁的整體技術(shù)狀況的評定結(jié)論,說明該橋加固的必要性。 (2)對該橋進行有限元的模擬分析,根據(jù)現(xiàn)場勘測的拱圈線型,建立有限元模型,并對橋梁的拱圈截面做相應(yīng)的折減,使其更加符合實際的受力情況。通過有限元計算,驗證了該橋需要進行加固的結(jié)論,并在此基礎(chǔ)上提出了兩種不同的加固方案。 (3)對于所提出的兩種方案進行有限元分析,根據(jù)計算結(jié)果,對兩種方案的反力、位移、內(nèi)力、應(yīng)力的結(jié)果進行逐項對比,通過對比結(jié)果和橋梁加固方案的選擇原則確定粘貼鋼板為最后的加固方案。 (4)研究粘貼鋼板加固界面上的剪切應(yīng)力。對于所選定的方案進行加固界面上的剪切應(yīng)力的分析,根據(jù)所建立實體有限元模型的計算,得出混凝土和鋼板接觸面上的剪切應(yīng)力。通過計算結(jié)果和現(xiàn)在通用結(jié)構(gòu)膠6202抗剪強度的對比可得抗剪強度滿足受力要求,加固后結(jié)構(gòu)安全、可靠。
[Abstract]:Over the past few decades, the country's economic level has grown rapidly. Accordingly, traffic and vehicle loads have increased dramatically, and many bridges have been damaged to varying degrees. These old bridges have been strengthened. So that it can continue to serve for public transport has become an urgent problem to be solved. In this paper, combining with Dalian Shengli Bridge reinforcement example, the following aspects are mainly studied:. Through the detection of bridge deck system, superstructure, substructure and deck decoration, the concrete test results are given, and the bridge technical status of the corresponding part of the bridge is evaluated by the test results. Finally, the evaluation conclusion of the whole technical condition of the bridge is obtained, and the necessity of strengthening the bridge is explained. The finite element analysis of the bridge is carried out, and the finite element model is established according to the arch ring alignment surveyed in the field, and the section of the arch ring of the bridge is reduced accordingly to make it more in line with the actual stress situation. The conclusion that the bridge needs to be strengthened is verified, and two different reinforcement schemes are put forward. The finite element analysis of the two schemes is carried out. According to the calculation results, the results of reaction, displacement, internal force and stress of the two schemes are compared one by one. By comparing the results and the selection principle of the bridge reinforcement scheme, the bonding steel plate is determined as the final reinforcement plan. (4) the shear stress on the interface of the bonded steel plate is studied. For the selected scheme, the shear stress at the interface is analyzed, and the calculation of the finite element model is carried out according to the established finite element model. The shear stress on the contact surface of concrete and steel plate is obtained. By comparing the calculation results with the shear strength of current structural adhesive 6202, it is found that the shear strength can meet the stress requirements, and the strengthened structure is safe and reliable.
【學(xué)位授予單位】：大連理工大學(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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