本文關(guān)鍵詞： 矮塔斜拉橋 施工控制 結(jié)構(gòu)參數(shù) 有限元法 箱梁　出處：《長(zhǎng)安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：矮塔斜拉橋又稱之為部分斜拉橋，它作為近代發(fā)展起來(lái)的一種新型的橋梁結(jié)構(gòu)形式，以其優(yōu)越的結(jié)構(gòu)性能和良好的經(jīng)濟(jì)指標(biāo)，在橋梁設(shè)計(jì)中該橋型已被廣泛的采用。而預(yù)應(yīng)力混凝土寬箱梁以其抗彎、抗扭剛度大,穩(wěn)定性好和整體受力狀況良好等特點(diǎn)，被廣泛應(yīng)用于矮塔斜拉橋主梁設(shè)計(jì)當(dāng)中。 本文以在建的東莞市中堂水道大橋（矮塔單索面預(yù)應(yīng)力混凝土寬箱梁斜拉橋）為研究對(duì)象，首先對(duì)矮塔斜拉橋的發(fā)展，結(jié)構(gòu)特征，以及對(duì)矮塔斜拉橋主橋施工控制的重要性等問(wèn)題進(jìn)行了一些研究；其次對(duì)寬箱梁的受力特點(diǎn)進(jìn)行簡(jiǎn)單的探討。 首先運(yùn)用有限元分析軟件Midas/Civil建立全橋模型，采用無(wú)應(yīng)力狀態(tài)法按照施工方案和設(shè)計(jì)圖紙對(duì)中堂水道大橋進(jìn)行施工階段的仿真分析，并計(jì)算各個(gè)施工工況下主梁結(jié)構(gòu)的內(nèi)力、變形及索力情況。計(jì)算結(jié)果表明，懸臂施工法能很好保證橋梁的合理成橋。 其次還將對(duì)影響橋梁施工控制中的結(jié)構(gòu)參數(shù)進(jìn)行敏感性分析，本文主要分析了結(jié)構(gòu)材料彈性模量、材料容重、溫度和索力等敏感性參數(shù)，并選擇索塔固結(jié)附近處主梁節(jié)段利用有限元軟件Midas/FEA對(duì)其實(shí)體分析，，分析寬箱梁在不同的工況作用下的橫向受力情況。
[Abstract]:Low tower cable-stayed bridge is also called partial cable-stayed bridge. As a new type of bridge structure developed in modern times, it has excellent structural performance and good economic index. In the design of the bridge, the bridge has been widely used, while the prestressed concrete wide box girder is characterized by its bending resistance, torsional stiffness, good stability and good overall stress condition. It is widely used in the design of main girder of low tower cable-stayed bridge. In this paper, the construction of Dongguan Zhongtang waterway Bridge (short tower single cable plane prestressed concrete wide box girder cable-stayed bridge) as the research object, first of all, the development of the low tower cable-stayed bridge, structural characteristics. The importance of construction control of the main bridge of the cable-stayed bridge with low tower is also studied. Secondly, the stress characteristics of wide box girder are simply discussed. First, the finite element analysis software Midas/Civil is used to establish the full-bridge model, and the non-stress state method is used to simulate the construction stage of Zhongtang waterway Bridge according to the construction plan and design drawings. The internal force, deformation and cable force of the main beam structure under various construction conditions are calculated. The calculation results show that the cantilever construction method can ensure the bridge to be completed reasonably. Secondly, the sensitivity of the structural parameters which affect the bridge construction control is analyzed. This paper mainly analyzes the sensitive parameters such as elastic modulus, bulk weight, temperature and cable force. The section of the main girder near the consolidation of the cable tower is analyzed by the finite element software Midas/FEA, and the transverse force of the wide box girder under different working conditions is analyzed.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.27

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