本文關(guān)鍵詞：單索面大挑臂斜拉橋非線性穩(wěn)定性研究　出處：《東北林業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 大挑臂 單索面斜拉橋 非線性穩(wěn)定 有限元分析 荷載試驗

【摘要】：斜拉橋以超強跨越能力、美觀的外形等諸多優(yōu)點而成為現(xiàn)代橋梁工程中發(fā)展最迅速、最具競爭力的橋型之一。大跨度斜拉橋整體和局部構(gòu)件的穩(wěn)定性成為了斜拉橋計算中的關(guān)鍵,也是制約超大跨斜拉橋發(fā)展的因素之一。本文以黑瞎子島烏蘇斜拉橋為工程背景,基于非線性理論和穩(wěn)定分析理論,通過對該橋進行的有限元仿真分析,對大挑臂單索面鋼箱梁斜拉橋的非線性因素影響敏感性和結(jié)構(gòu)的穩(wěn)定性進行研究,主要內(nèi)容包括：1、通過烏蘇斜拉橋有限元計算,分析自重、二期恒載及運營活載作用階段下各幾何非線性影響因素對結(jié)構(gòu)內(nèi)力和變形的影響程度。結(jié)果表明在自重和二期恒載施工階段,斜拉索的垂度效應(yīng)產(chǎn)生的非線性影響最明顯,而在行車活載階段,大位移效應(yīng)成為對斜拉橋計算結(jié)果影響最明顯的參數(shù)。2、通過有限元計算,分析了成橋運營階段整體結(jié)構(gòu)的線彈性和非線性兩類穩(wěn)定問題,并對比幾何非線性和材料非線性對穩(wěn)定性分析結(jié)果的影響程度。此外,還分析了不同主塔橫截面尺寸對橋梁整體及局部橋塔的穩(wěn)定性影響；通過對關(guān)鍵部位構(gòu)件的細(xì)化分析模型,研究了索梁錨固區(qū)、索塔錨固區(qū)及箱梁長挑臂的局部力學(xué)性能和穩(wěn)定性。計算結(jié)果表明烏蘇斜拉橋最小穩(wěn)定系數(shù)計算結(jié)果為6.513,其整體及局部構(gòu)件的穩(wěn)定性是足夠的。3、結(jié)合烏蘇斜拉橋?qū)崢蚝奢d試驗,總結(jié)了靜、動載狀況下荷載試驗測試結(jié)果。在評價橋梁結(jié)構(gòu)實際狀態(tài)承載能力和振動特性的同時,實測結(jié)果數(shù)據(jù)也驗證了有限元模擬計算數(shù)據(jù)的正確性和合理性。
[Abstract]:The cable-stayed bridge has become the most rapid development in modern bridge engineering because of its many advantages such as super span ability beautiful shape and so on. One of the most competitive bridge types, the stability of the whole and local components of the long-span cable-stayed bridge becomes the key to the calculation of the cable-stayed bridge. It is also one of the factors that restrict the development of super large span cable-stayed bridge. In this paper, based on the nonlinear theory and stability analysis theory, the finite element simulation analysis of the bridge is carried out based on the engineering background of Hexiaizi Island Wusu cable-stayed bridge. The influence of nonlinear factors on sensitivity and structural stability of steel box girder cable-stayed bridge with large cantilever single cable plane is studied. The main contents include: 1, through the finite element calculation of Wusu cable-stayed bridge, the deadweight is analyzed. The degree of influence of geometric nonlinear factors on the internal force and deformation of the structure under the second stage of dead load and the operation stage of live load. The results show that in the stage of deadweight and second stage of dead load construction. The nonlinear effect of cable sag effect is the most obvious, but in the stage of moving load, the large displacement effect becomes the most obvious parameter. 2, which is calculated by finite element method. In this paper, the linear elastic and nonlinear stability problems of the whole structure in the operation stage of the bridge are analyzed, and the influence of geometric nonlinearity and material nonlinearity on the stability analysis results is compared. The influence of different cross section size of main tower on the stability of bridge whole and local tower is also analyzed. The Anchorage zone of cable beam is studied through the detailed analysis model of the key parts. The local mechanical properties and stability of cable tower Anchorage zone and long cantilever of box girder are calculated. The calculated results show that the minimum stability coefficient of Wusu cable-stayed bridge is 6.513, and the stability of the whole and local members is sufficient. 3. Combined with the load test of Wusu cable-stayed bridge, the load test results under static and dynamic load conditions are summarized, and the load bearing capacity and vibration characteristics of the bridge structure are evaluated at the same time. The measured data also verify the correctness and rationality of the finite element simulation data.
【學(xué)位授予單位】：東北林業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U448.27

【引證文獻(xiàn)】

相關(guān)會議論文 前1條

1 顧安邦;向中富;徐君蘭;孫淑紅;;重慶大佛寺長江大橋(45Om混凝土斜拉橋)的穩(wěn)定分析[A];中國公路學(xué)會橋梁和結(jié)構(gòu)工程學(xué)會2001年橋梁學(xué)術(shù)討論會論文集[C];2001年

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本文編號：1384416