【摘要】：斜拉橋是一種特殊結(jié)構(gòu)的橋梁，其特殊之處就是在于可以給定一個拉索的初拉力，這個初拉力可以改變整個斜拉橋結(jié)構(gòu)體系的內(nèi)力和變形以及各個部件的受力，但是影響斜拉橋內(nèi)力的因素還有很多，例如加設(shè)輔助墩。對于斜拉橋這種大跨度的超靜定結(jié)構(gòu)體系，在恒荷載和活荷載作用下，結(jié)構(gòu)體系受力很大；在地震、臺風(fēng)以及車輛移動荷載等動力作用下，，動力反應(yīng)比較敏感，所以研究斜拉橋在有無輔助墩條件下的靜力以及動力反應(yīng)是很有必要的。本文以飛云江三橋為論文研究背景，通過改變該獨塔斜拉橋有無輔助墩條件下兩種不同的結(jié)構(gòu)體系，利用有限元軟件Midas/civil2010建立兩種體系模型，系統(tǒng)分析了輔助墩對獨塔斜拉橋的靜力、動力以及地震響應(yīng)影響問題。本文的主要工作內(nèi)容如下： （1）利用斜拉橋中的斜拉索力無約束優(yōu)化法中的彎曲能量最小法，確定平陽側(cè)有、無輔助墩條件下兩種結(jié)構(gòu)體系的成橋索力，并將這兩種成橋索力結(jié)果與實際成橋索力進行比較。 （2）以工程實際的成橋索力為基礎(chǔ)，對獨塔斜拉橋在有、無輔助墩條件下進行靜力分析，對比在有無輔助墩條件下兩種不同結(jié)構(gòu)體系在恒荷載、活荷載、移動荷載、溫度荷載、荷載組合等工況下的內(nèi)力以及變形的規(guī)律。 （3）計算有、無輔助墩條件下兩種不同結(jié)構(gòu)體系的獨塔斜拉橋的動力特性，包括自振周期、頻率以及振型特點等。 （4）對獨塔斜拉橋進行反應(yīng)譜分析，對比在有、無輔助墩條件下兩種結(jié)構(gòu)體系地震作用下的動力響應(yīng)。
[Abstract]:The cable-stayed bridge is a kind of special structure bridge. The special part of the bridge is that the initial tension of a cable can be given, which can change the internal force and deformation of the whole cable-stayed bridge structure system and the force of each component. However, there are many factors that affect the internal force of cable-stayed bridge, such as adding auxiliary piers. For long-span statically indeterminate structures such as cable-stayed bridges, the structural system is subjected to very large forces under constant and live loads, and the dynamic response is more sensitive to earthquakes, typhoons and moving loads of vehicles. So it is necessary to study the static and dynamic responses of cable-stayed bridges with or without auxiliary piers. In this paper, the Feiyun River third Bridge is taken as the research background. By changing the two different structural systems of the single-tower cable-stayed bridge with or without auxiliary piers, the finite element software Midas/civil2010 is used to establish two kinds of system models. The influence of auxiliary piers on static, dynamic and seismic response of single tower cable-stayed bridge is systematically analyzed. The main work of this paper is as follows: (1) using the minimum bending energy method of the cable-stayed cable force optimization method in the cable-stayed bridge, the cable forces of the two structural systems are determined under the condition of the pingyang side and the non-auxiliary pier. The results are compared with the actual cable forces. (2) based on the actual bridge cable forces, the static analysis of single tower cable-stayed bridges with or without auxiliary piers is carried out. The internal forces and deformation of two different structural systems under constant load, live load, moving load, temperature load, load combination and so on are compared under the condition of auxiliary pier. (3) the law of internal force and deformation of two different structural systems under constant load, live load, moving load, temperature load, load combination, etc. The dynamic characteristics of two kinds of single tower cable-stayed bridges without auxiliary piers, including the natural vibration period, frequency and mode characteristics, etc. (4) the response spectrum analysis of single tower cable-stayed bridge is compared with that of single tower cable-stayed bridge. Dynamic response of two structural systems under seismic action without auxiliary piers.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U448.27

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