本文選題：獨塔鋼箱梁　切入點：自錨式懸索橋　出處：《南京林業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：自錨式懸索橋由于其外觀優(yōu)美、適應(yīng)能力強(qiáng)等優(yōu)點而越來越受到橋梁設(shè)計師的青睞，但由于自身的受力特點以及施工順序不同于地錨式懸索橋而給設(shè)計和施工帶來許多難點，特別是對于體系轉(zhuǎn)換過程的施工控制尤為復(fù)雜。 本文首先總結(jié)了自錨式懸索橋的發(fā)展概況和計算分析理論，然后以某獨塔鋼箱梁自錨式懸索橋為工程背景，對自錨式懸索橋施工控制進(jìn)行了研究，具體內(nèi)容包括以下幾個方面： （1）根據(jù)自錨式懸索橋合理成橋狀態(tài)目標(biāo)原則，通過有限元軟件Midas/Civil確定自錨式懸索橋的合理成橋狀態(tài)模型。 （2）根據(jù)分段懸鏈線理論，通過解析程序編寫，計算空纜線形，并與有限元軟件倒拆的空纜線形進(jìn)行對比，驗證有限元軟件得出的空纜模型正確性。在空纜模型的基礎(chǔ)上，研究溫度對主纜線形的變化影響。在現(xiàn)場主纜架設(shè)過程中，采用力與位移雙控制的方法來保證主纜索股線形架設(shè)的準(zhǔn)確程度。 （3）結(jié)合某獨塔鋼箱梁自錨式懸索橋體系轉(zhuǎn)換過程，提出了“吊桿交替張拉”方案，相對于傳統(tǒng)的對稱張拉，解決了在張拉過程中避免單個吊桿出現(xiàn)過大的張拉力而影響相鄰的吊桿索力衰減，甚至為零的問題。分析在張拉過程中自錨式懸索橋的受力特點和變形特征，并對吊桿的加工長度進(jìn)行計算。 （4）將“吊桿交替張拉”方案用于該實橋，對懸索橋體系轉(zhuǎn)換過程進(jìn)行施工控制監(jiān)測，實測結(jié)果表明：主纜和加勁梁線形與目標(biāo)狀態(tài)相一致，吊桿索力均勻，與成橋設(shè)計索力誤差基本控制在3%以內(nèi)，說明對該自錨式懸索橋的施工控制效果良好。 本文通過理論分析和對現(xiàn)場過程的施工控制，順利完成該橋的體系轉(zhuǎn)換，，可以為同類型自錨式懸索橋的施工控制分析提供參考價值。
[Abstract]:Self anchored suspension bridge because of its beautiful appearance, strong adaptability and more and more bridge designers, but because of their mechanical characteristics and construction sequence is different from the earth anchored suspension bridge design and construction and brings many difficulties, especially for the construction of the system conversion process control is very complicated.
This paper first summarizes the development and the theory of computation and analysis of self anchored suspension bridge. Then taking a single tower steel box girder self anchored suspension bridge as the engineering background, the construction control of self anchored suspension bridge is studied, including the following aspects.
(1) the reasonable bridge state model of self anchored suspension bridge is determined by the finite element software Midas/Civil, according to the principle of the rational bridge state target of self anchored suspension bridge.
(2) according to the catenary theory, through the analytical program, the calculation of cable shape, cable shape and backward with the finite element software and compared to verify the correctness of the model of cable finite element software obtained. Based on the empty cable model, the effect of temperature on the alignment of the main cable is in the main effect. The cable erection process, method adopts the double control force and displacement of the main cable to ensure the accuracy of linear shares of erection.
(3) with a single tower steel box girder self anchored suspension bridge system conversion process, put forward the "alternate tension boom" program, compared with the traditional symmetrical tension, solved in the tensioning process to avoid a single suspender tension appeared large and the influence of adjacent Suspender Force attenuation, or zero. By analyzing the stress characteristics and deformation features in the tensioning process of self anchored suspension bridge, and to calculate the length of processing boom.
(4) the "boom alternating stretching scheme for the bridge, construction control of suspension bridge monitoring system conversion process, the test results show that the consistent alignment of the main cable and the stiffening girder and the target state, the suspender force uniform, and the bridge design of cable force error control in 3%. The good on the self anchored suspension bridge construction control effect.
Through theoretical analysis and construction control of site process, the system transformation of the bridge is successfully completed, which can provide reference value for construction control analysis of the same type self anchored suspension bridge.

【學(xué)位授予單位】：南京林業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.4;U448.25

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