本文選題：鋼管混凝土系桿拱橋 + 整體吊裝��； 參考：《長安大學(xué)》2014年碩士論文

【摘要】：鋼管混凝土系桿拱橋以良好的結(jié)構(gòu)受力特性和美學(xué)價值，在我國公路橋梁中得到了廣泛應(yīng)用。當(dāng)鋼管混凝土系桿拱橋上跨既有高等級道路或高等級航道時，可采用浮吊整體吊裝鋼管拱肋和系梁勁性骨架的全新施工方法。整體吊裝施工方法的關(guān)鍵技術(shù)主要包括合理施工狀態(tài)確定、吊點位置選擇及施工方案制定。本文對整體吊裝鋼管混凝土系桿拱橋施工關(guān)鍵技術(shù)進(jìn)行了以下研究： （1）基于對鋼管混凝土系桿拱橋施工技術(shù)的歸納總結(jié)，分析了目前國內(nèi)鋼管混凝土系桿拱橋整體吊裝技術(shù)的現(xiàn)狀，明確了整體吊裝施工技術(shù)中需要解決的關(guān)鍵問題、研究目的和意義。 （2）根據(jù)下承式鋼管混凝土系桿拱橋的相關(guān)理論，對確定合理施工狀態(tài)的基本原理進(jìn)行分析，得出了合理成橋狀態(tài)與合理施工狀態(tài)的主要方法；基于吊點布置合理性不同評價準(zhǔn)則，對比分析了各條準(zhǔn)則的區(qū)別和適用條件。 （3）以合理成橋狀態(tài)的確定步驟為基礎(chǔ)，研究了確定合理成橋狀態(tài)的基本算法，提出了拱肋應(yīng)力控制條件和彎矩可行域；以合理成橋狀態(tài)為目標(biāo)，采用正裝迭代與影響矩陣相結(jié)合的方法，形成了合理吊桿張拉力的計算方法；根據(jù)鋼管混凝土系桿拱橋結(jié)構(gòu)分析基本理論，分析了施工階段拱肋和預(yù)應(yīng)力系桿的作用，明確了合理施工狀態(tài)下預(yù)制拱肋標(biāo)高和施工階段預(yù)應(yīng)力系桿張拉力計算方法。 （4）結(jié)合工程實例，基于合理成橋狀態(tài)和合理施工狀態(tài)理論計算方法，通過建立有限元模型，計算了合理成橋狀態(tài)，進(jìn)而確定了合理施工狀態(tài)下相應(yīng)的拱肋預(yù)拱度和吊桿張拉力，驗證本文提出的合理吊桿力計算方法的可行性和正確性。 （5）通過對鋼管混凝土系桿拱橋傳力路徑和受力特點的分析，明確了吊裝過程不同吊點位置對拱肋力學(xué)性能的影響，提出了吊點位置的確定原則。通過對工程實例中整體吊裝鋼管拱肋及勁性骨架選取多個不同吊點位置進(jìn)行試算，并將結(jié)果進(jìn)行對比分析，確定了合理吊點位置并在依托工程中得到驗證；提出了施工方案制定原則，結(jié)合實際施工場地和施工設(shè)備，，因地制宜制定了吊裝方案。
[Abstract]:Concrete-filled steel tubular tied arch bridge has been widely used in highway bridges in China because of its good structural characteristics and aesthetic value. When the upper span of concrete-filled steel tubular tied arch bridge is on the existing high-grade road or high-grade channel, a new construction method of hoisting steel pipe arch rib and tie-in beam stiffness skeleton can be adopted. The key techniques of integral hoisting construction include the determination of reasonable construction state, the selection of hoisting point position and the formulation of construction scheme. In this paper, the key construction technology of concrete-filled steel tubular tied arch bridge is studied as follows: (1) based on the summary of construction technology of concrete-filled steel tubular tied arch bridge, This paper analyzes the present situation of integral hoisting technology of concrete-filled steel tubular tied arch bridge in China, and clarifies the key problems to be solved in the construction technology of integral hoisting. The purpose and significance of the research. (2) according to the theory of through concrete filled steel tube tied arch bridge, the basic principle of determining the reasonable construction state is analyzed, and the main methods of reasonable bridge completion and reasonable construction state are obtained. Based on the different evaluation criteria of the rationality of hanging point arrangement, the differences and applicable conditions of each criterion are compared and analyzed. (3) based on the steps of determining the reasonable bridge state, the basic algorithm for determining the reasonable bridge state is studied. The stress control conditions of arch rib and the feasible region of bending moment are put forward, and the reasonable tension calculation method of suspenders is formed by combining the formal iteration with the influence matrix, aiming at the reasonable state of the bridge. According to the basic theory of structure analysis of concrete-filled steel tubular tied arch bridge, the effect of arch rib and prestressed tie bar in construction stage is analyzed. The calculation method of prefabricated arch rib elevation and tensioning force of prestressed tie bar in construction stage under reasonable construction condition is defined. (4) based on the theoretical calculation method of reasonable bridge state and reasonable construction state, combined with engineering examples, By establishing the finite element model, the reasonable state of the bridge is calculated, and the corresponding pre-arch degree of arch rib and the tension force of the suspender are determined under the reasonable construction condition. The feasibility and correctness of the proposed method are verified. (5) through the analysis of the load transfer path and force characteristics of concrete-filled steel tubular tied arch bridge, The influence of different lifting point positions on the mechanical properties of arch ribs is clarified, and the determination principle of hoisting point position is put forward. Through the trial calculation of the hoisting steel pipe arch rib and the rigid skeleton in the engineering example, the results are compared and analyzed, and the reasonable lifting point position is determined and verified in the supporting project. The principle of construction scheme is put forward, and the hoisting scheme is made according to local conditions combined with actual construction site and construction equipment.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U445.4;U448.225

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