本文關鍵詞：鋼箱梁頂推施工安全性分析　出處：《北京交通大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 頂推法 鋼箱梁 受力特性 局部應力 橋墩 安全性分析

【摘要】：摘要：隨著鐵路線路的不斷擴建,跨越既有線的情況越來越多。頂推施工是跨越既有線的新線橋梁常用的施工方法。本文主要對鋼箱梁頂推施工過程中鋼梁和橋墩的受力行為進行了研究,主要內(nèi)容如下： (1)詳細闡述了頂推法的發(fā)展應用、頂推施工的工藝特點以及梁體在頂推過程中的受力特點。 (2)采用Midas/Civil模擬鋼箱梁結(jié)構(gòu)頂推施工階段的受力行為,包括鋼箱梁的支反力、變形和組合應力的大小和變化規(guī)律。檢算了模擬拼裝平臺(包括滑道梁、鋼管立柱),分析其內(nèi)力或應力的大小和規(guī)律,以及支架的整體變形。 (3)通過構(gòu)造簡支梁模型,計算了鋼箱梁縱向抗傾覆穩(wěn)定系數(shù),并計算了風荷載影響下的橫向抗傾覆系數(shù)。 (4)運用有限元分析軟件Midas/FEA對鋼箱梁進行局部應力分析。通過對主梁墩頂處和托座處梁體的局部受力分析,得出了頂板、底板、腹板、加勁肋和橫隔板應力最大值及其位置。 (5)運用大型有限元軟件ANSYS模擬,分析了橋墩在水平摩擦力作用下的受力性能。
[Abstract]:Abstract: with the continuous expansion of the railway line, crossing the existing situation more and more. Pushing construction is the construction method of new bridges across existing lines. This paper focuses on the steel beam and steel box girder pier jacking construction process stress behavior was studied. The main contents are as follows:
(1) the development and application of the push method, the technological characteristics of the jacking construction and the stress characteristics of the beam body during the pushing process are described in detail.
(2) Midas/Civil was used to simulate the steel box girder jacking construction stage of the mechanical behavior of steel box girder, including the force, deformation and combination of size and variation of stress. The calculated simulation assembly platform (including slide beam, steel column), the size and regularity of the internal force or stress, and support the deformation of the whole.
(3) through the construction of simple supported beam model, the longitudinal anti overturning stability coefficient of steel box girder is calculated, and the lateral anti overturning coefficient under the influence of wind load is calculated.
(4) using finite element analysis software Midas/FEA to the local stress analysis of steel box girder. Through the analysis of local force of main girder pier roof and bracket beam at the body, the roof, floor, web stiffeners and diaphragms, the maximum stress and its position.
(5) the large finite element software ANSYS simulation is used to analyze the force performance of the pier under the action of horizontal friction.

【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.4;U448.213

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本文編號：1419755