本文選題：懸索橋 + 凍雨�。� 參考：《長安大學(xué)》2015年碩士論文

【摘要】：鋼箱梁懸索橋不僅橋型美觀、很大的跨越能力、結(jié)構(gòu)形式簡單,而且結(jié)構(gòu)的受力及其經(jīng)濟性能良好,所以是當(dāng)今社會大跨徑橋梁結(jié)構(gòu)主要形式之一。隨著社會的進步,科技的快速發(fā)展,在跨江和跨大峽谷中,大跨徑橋梁越來越多,需要更好的施工技術(shù)來完成。所以對高原凍雨山區(qū)大跨徑懸索橋主纜和鋼箱梁線形及內(nèi)力研究具有相當(dāng)重要的應(yīng)用價值。本文以剛剛建成的一座鋼箱梁懸索橋為依托工程,對理論計算和主纜及鋼箱梁狀態(tài)進行研究。首先:介紹了懸索橋的國內(nèi)外發(fā)展史,研究高原凍雨山區(qū)懸索橋結(jié)構(gòu)變形和受力特點的意義。針對特殊氣候環(huán)境下懸索橋研究的主要內(nèi)容。談?wù)搼宜鳂蛑骼|線形的理論計算方法。以普立特大橋為依托工程,采用有限元方法,建立有限元計算模型,計算施工過程中,懸索橋所需的理論參數(shù),對現(xiàn)場大橋的施工提供參考性的建議。其次:分析懸索橋五大組成構(gòu)件,在制造及施工過程中,可能存在的誤差及其來源,對誤差進行定量分析。以懸索橋主纜空纜線形及其索力、成橋主纜線形及其索力和成橋鋼箱梁線形及其內(nèi)力為控制目標(biāo),對可能存在的誤差參數(shù)進行敏感性分析,研究控制目標(biāo)的變化規(guī)律及其幅值,對進一步施工控制突破側(cè)重點,使施工質(zhì)量達到設(shè)計狀態(tài)。最后:針對高原凍雨山區(qū)的環(huán)境下,研究橋梁結(jié)構(gòu)成橋狀態(tài)的變化規(guī)律。采集橋位處實際的溫度和結(jié)構(gòu)的日照溫差,分析其變化規(guī)律,采用有限元程序建立懸索橋結(jié)構(gòu)模型,并且模擬現(xiàn)場的實測整體溫度變化,用溫度梯度模擬橋梁的結(jié)構(gòu)日照溫差,進而研究懸索橋成橋主纜和鋼箱梁的線形及其內(nèi)力變化規(guī)律。冰凍荷載采用低溫環(huán)境和凍雨的靜力荷載進行組合,進行懸索橋狀態(tài)的研究。為今后業(yè)內(nèi)人士對高原凍雨山區(qū)同類型橋梁的設(shè)計及施工提供參考性的建議。
[Abstract]:Steel box girder suspension bridge is not only a beautiful bridge with great span ability, simple structure form, but also a good force and economic performance of the structure, so it is one of the main forms of long span bridge structure in the society today. With the progress of society and the rapid development of science and technology, there are more and more long-span bridges across rivers and canyons. Therefore, the research on the main cable and steel box girder of the long span suspension bridge in the highland frozen rain mountain area has important application value. Based on the newly built steel box girder suspension bridge, the theoretical calculation and the state of the main cable and the steel box girder are studied in this paper. Firstly, the development history of suspension bridge at home and abroad is introduced, and the significance of structural deformation and stress characteristics of suspension bridge in highland frozen rain mountain area is studied. The main contents of the research on suspension bridge under special climate environment are discussed. This paper discusses the theoretical calculation method of the main cable shape of the suspension bridge. Based on the project of Puli Bridge, the finite element calculation model is established by using finite element method, and the theoretical parameters of suspension bridge are calculated in the course of construction, which provides some suggestions for the construction of local bridge. Secondly, the possible errors and their sources in the manufacture and construction of the five components of the suspension bridge are analyzed, and the errors are quantitatively analyzed. Taking the main cable of suspension bridge and its cable force, the main cable form of the bridge and its cable force and the steel box girder of the bridge and its internal force as the control objectives, the sensitivity of the possible error parameters is analyzed, and the variation law and amplitude of the control target are studied. For further construction control break through the focus, so that the construction quality to design state. Finally, the changing law of bridge structure is studied under the environment of plateau frozen rain mountain area. The actual temperature at the bridge location and the sunshine temperature difference of the structure are collected and analyzed. The structural model of the suspension bridge is established by using finite element program, and the global temperature change of the field is simulated. The temperature gradient is used to simulate the temperature difference of the structure of the bridge. Then the linear shape and internal force of the main cable and steel box girder of suspension bridge are studied. The frozen load is combined with the static load of freezing rain to study the state of suspension bridge. It provides reference suggestions for the design and construction of the same type bridges in highland frozen rain mountain areas in the future.
【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】：2015
【分類號】：U448.25

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相關(guān)期刊論文 前1條

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