本文選題：多塔懸索橋 + 結(jié)構(gòu)體系��； 參考：《長沙理工大學(xué)》2015年碩士論文

【摘要】：與梁橋、拱橋、剛構(gòu)橋、斜拉橋等橋型所不同,懸索橋依靠強大的主纜來承受荷載,橋梁受到的荷載通過吊索傳遞給主纜,再經(jīng)橋塔傳到地基,這樣在結(jié)構(gòu)上就與其他的橋型有很大不同,這樣不僅能減小橋梁本身的自重荷載,還能使材料的強度得到充分地利用,從而使得懸索橋比其他橋型具有更強的跨越能力,而多塔多跨懸索橋就是在原來兩塔懸索橋兩個橋塔之間再多設(shè)置一個甚至多個中塔,從而使懸索橋能夠?qū)崿F(xiàn)多個主跨的連續(xù)跨越,跨越的長度得到了更大的延伸。本文以銀川濱河黃河大橋(跨徑布置:88+218+218+88=612m)三塔自錨式懸索橋為研究的工程背景,借助非線性有限元分析程序Midas Civil,建立了多塔多跨自錨式懸索橋的分析模型,對其總體的線形進行準(zhǔn)確詳細(xì)的分析研究,對橋梁體系和中塔的合理剛度取值進行分析研究,主要內(nèi)容和研究工作如下:(1)總結(jié)了國內(nèi)外多塔多跨懸索橋在歷史上的發(fā)展歷程,列舉了國內(nèi)外正在建設(shè)和已經(jīng)建成的橋梁實例以及曾經(jīng)提出過的主要多塔多跨懸索橋的橋梁方案,然后重點歸納出了其結(jié)構(gòu)體系、力學(xué)性能、中塔剛度的合理取值以及研究中存在的問題。(2)闡述了懸索橋分析的有關(guān)理論,建立了多塔多跨自錨式懸索橋的分析模型,通過計算,得出了增大主跨長度和改變邊跨和中跨長度之比對橋梁動靜力性能的影響規(guī)律。(3)針對多塔多跨自錨式懸索橋中塔的剛度對懸索橋受力影響極為顯著的特點,研究得出了在車輛荷載的作用下,中塔剛度取邊塔剛度不同倍數(shù)時結(jié)構(gòu)的動靜力特性,得出了中塔合理的剛度取值,以及改變中塔剛度值的大小、中塔的相對高度和結(jié)構(gòu)形式對懸索橋動力性能的影響規(guī)律。(4)研究了多塔自錨式懸索橋在是否設(shè)置中央扣、是否設(shè)置中塔彈性索、是否設(shè)置梁塔約束的情況下結(jié)構(gòu)動靜力特性,得出了影響規(guī)律,并且提出了設(shè)計和施工的相關(guān)建議。
[Abstract]:Unlike girder bridges, arch bridges, rigid frame bridges, cable-stayed bridges and other types of bridges, suspension bridges rely on strong main cables to withstand loads, and the loads on bridges are transmitted to the main cable through slings, and then to the foundation through the tower. In this way, the structure is quite different from other bridge types, which not only reduces the weight load of the bridge itself, but also makes full use of the strength of the material, thus making the suspension bridge have stronger span ability than other bridge types. And the multi-tower and multi-span suspension bridge is to set up one or more middle towers between the two towers of the original suspension bridge, so that the suspension bridge can realize the continuous span of multiple main spans, and the length of the span has been extended more. In this paper, based on the engineering background of the three-tower self-anchored suspension bridge of Yinchuan River Yellow River Bridge (span arrangement: 88,218,88812m), a multi-tower and multi-span self-anchored suspension bridge analysis model is established with the help of the nonlinear finite element analysis program Midas Civil. The overall line shape of the bridge is analyzed accurately and in detail, and the reasonable stiffness of the bridge system and the middle tower is analyzed and studied. The main contents and research work are as follows: 1) the history of the multi-tower and multi-span suspension bridge at home and abroad is summarized. Examples of bridges being built and completed at home and abroad and the bridge schemes of main multi-tower and multi-span suspension bridges have been proposed, and then the structural system and mechanical properties of the bridges are summarized emphatically. The analysis theory of suspension bridge is expounded, and the analysis model of multi-tower and multi-span self-anchored suspension bridge is established. The effects of increasing the length of main span and changing the ratio of side span and middle span on the dynamic and dynamic behavior of the bridge are obtained. (3) aiming at the characteristic that the stiffness of the tower in the multi-tower multi-span self-anchored suspension bridge has a very significant effect on the force of the suspension bridge, Under the action of vehicle load, the dynamic and dynamic characteristics of the structure are obtained when the stiffness of the tower is different times, and the reasonable stiffness value of the middle tower is obtained, and the magnitude of the stiffness value of the middle tower is changed. The influence of the relative height and structure form of the middle tower on the dynamic performance of the suspension bridge is studied. (4) the dynamic and dynamic characteristics of the multi-tower self-anchored suspension bridge are studied under the condition of whether the central buckle is set, whether the elastic cable of the middle tower is installed, and whether the beam tower is constrained. The influence law is obtained, and the relevant suggestions for design and construction are put forward.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U448.25

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本文編號：1941991