【摘要】：橋梁是人類在生產(chǎn)與生活中,為跨越山澗、不良地質(zhì)或滿足其他交通需要而架設(shè)的使通行更加便捷的建筑物。預(yù)應(yīng)力連續(xù)剛構(gòu)-鋼管混凝土拱橋是橋梁中重要的組成類型,結(jié)合了拱橋與剛構(gòu)橋的特點,具有跨越能力大、耐久性好、施工更方便(無需體系轉(zhuǎn)換)、外形美觀、適應(yīng)能力更強(適合在山谷、河流中建高柔墩)、無需大型支座等許多優(yōu)點,在橋梁中展現(xiàn)出良好的發(fā)展勢頭。本文以預(yù)應(yīng)力連續(xù)剛構(gòu)-鋼管混凝土拱橋為研究對象,對橋梁的梁拱組合體系進行結(jié)構(gòu)行為分析。本文主要研究內(nèi)容如下:(1)概述了中國拱橋的發(fā)展情況、拱式組合橋的類型及特點、異型拱-剛構(gòu)組合梁橋的優(yōu)點及存在的問題和工程背景。(2)預(yù)應(yīng)力連續(xù)剛構(gòu)-鋼管混凝土拱橋的有限元建模,建模參照的相關(guān)標(biāo)準(zhǔn)與規(guī)范,以及使用的相關(guān)技術(shù)指標(biāo),采用的相關(guān)材料。本論文運用midas Civil有限元軟件進行模擬橋梁三維建模分析研究。(3)預(yù)應(yīng)力連續(xù)剛構(gòu)-鋼管混凝土拱橋進行靜力結(jié)構(gòu)分析,對預(yù)應(yīng)力連續(xù)剛構(gòu)-鋼管混凝土拱橋的承載能力、正常使用、短暫應(yīng)力分析研究,及橋梁鋼箱梁拱圈應(yīng)力分析,還對橋梁端橫梁作出靜力分析。(4)預(yù)應(yīng)力連續(xù)剛構(gòu)-鋼管混凝土拱橋進行特征值分析,采用子空間迭代法與Ritz向量法對比分析,并進行橋梁在有無鋼管混凝土拱下特征值對比分析。(5)分析預(yù)應(yīng)力連續(xù)剛構(gòu)-鋼管混凝土拱橋在去拱后,運用反應(yīng)譜分析對比研究。本論文進行對異形拱-剛構(gòu)組合梁橋有無鋼管混凝土拱的建模,并進行結(jié)構(gòu)行為分析,為以后類似橋梁的研究提供參考。
[Abstract]:Bridge is a kind of building built by people in order to cross mountain stream, bad geology or meet other traffic needs in production and life. Prestressed continuous rigid-frame-concrete-filled steel tube arch bridge is an important type of bridge. It combines the characteristics of arch bridge and rigid frame bridge. It has the advantages of large span ability, good durability, convenient construction (no system transformation) and beautiful appearance. It is more adaptable (suitable for building high and flexible piers in valleys and rivers) and does not need large supports and many other advantages, showing good development momentum in bridges. In this paper, the prestressed continuous rigid-frame-concrete-filled steel tube arch bridge is taken as the research object, and the structural behavior of the composite system of beam and arch of the bridge is analyzed. The main contents of this paper are as follows: (1) the development of arch bridges in China, the types and characteristics of arch composite bridges are summarized. The advantages, problems and engineering background of special-shaped arch and rigid frame composite beam bridge. (2) finite element modeling of prestressed continuous rigid-frame-steel tubular arch bridge, relevant standards and codes for modeling reference, and relevant technical specifications for use. Relevant materials used. In this paper, midas Civil finite element software is used to simulate the three-dimensional modeling and analysis of bridge. (3) static structure analysis of prestressed continuous rigid-frame-concrete filled steel tube arch bridge is carried out, and the bearing capacity of prestressed continuous rigid frame-steel tube arch bridge is analyzed. In normal use, transient stress analysis and stress analysis of steel box girder arch ring of bridge, static analysis of bridge end beam is also made. (4) Prestressed continuous rigid frame-concrete filled steel tube arch bridge is analyzed by eigenvalue analysis. The subspace iteration method and Ritz vector method are used to compare and analyze the eigenvalues of bridges with or without concrete filled steel tube arch. (5) the response spectrum analysis of prestressed continuous rigid frame-concrete filled steel tube arch bridge after arch removal is analyzed. In this paper, the model of concrete-filled steel tube arch in special-shaped arch and rigid frame composite beam bridge is established, and the structural behavior is analyzed, which provides a reference for the research of similar bridges in the future.
【學(xué)位授予單位】：西華大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U441

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