結(jié)構(gòu)線形對橋梁技術(shù)狀況評價的量化研究
發(fā)布時間：2018-03-30 09:15
本文選題：量化評價 切入點：下?lián)夏Ｊ?/strong> 出處：《重慶交通大學(xué)》2014年碩士論文
【摘要】：橋梁結(jié)構(gòu)由于受到多種內(nèi)外因素的影響，結(jié)構(gòu)線形或多或少都會發(fā)生一定變化。目前國內(nèi)相關(guān)規(guī)范對于結(jié)構(gòu)線形這一評價指標(biāo)基本都是采用定性的方法進(jìn)行描述，即使有的規(guī)范已有一定的量化分析成果，但仍不能滿足對既有橋梁的技術(shù)狀況評估要求。通過選取國內(nèi)兩種較為常見的梁橋和拱橋，利用midas civil有限元軟件建立了各自具有代表性的橋梁分析模型，，模擬橋梁結(jié)構(gòu)成橋狀態(tài)時可能出現(xiàn)的多種結(jié)構(gòu)線形變化情形，研究結(jié)構(gòu)線形變化后橋梁結(jié)構(gòu)內(nèi)力的變化規(guī)律，并建立相應(yīng)的層次分析模型，提出通過引入線形影響因子參數(shù)來探討基于結(jié)構(gòu)線形變化后的橋梁技術(shù)狀況評價方法。本文主要研究內(nèi)容有以下幾方面： ①簡明介紹了既有橋梁技術(shù)狀況量化評價的意義、重要性以及國內(nèi)外研究歷程；并簡要介紹了國內(nèi)現(xiàn)有橋梁技術(shù)狀況評價規(guī)范中的評價方法、理論和存在的一些不足。 ②簡要介紹了橋梁結(jié)構(gòu)線形變化的三種常見形式，并從預(yù)應(yīng)力損失、混凝土收縮徐變、設(shè)計理論、施工和后期運營管理分析了橋梁結(jié)構(gòu)線形后期發(fā)生變化的多種原因。 ③介紹了拱橋結(jié)構(gòu)主拱圈下?lián)系膸追N模式，并從中選取折線型下?lián)夏Ｊ酵瓿芍鞴叭Ω鹘孛嫦聯(lián)狭恐档姆峙�。利用midas civil軟件建立拱橋的有限元分析模型，模擬了在不同下?lián)狭恐岛拖聯(lián)蠀^(qū)段范圍內(nèi)，主拱圈整體下?lián)虾途植肯聯(lián)蠈皹蚪Y(jié)構(gòu)各控制截面內(nèi)力的影響及其內(nèi)力變化規(guī)律。 ④簡要介紹了梁橋結(jié)構(gòu)下?lián)系膬煞N可能模式，重點介紹和推導(dǎo)了撓曲線下?lián)夏Ｊ较碌挠嬎愎�，給出了當(dāng)下?lián)系淖畲罅恐岛拖聯(lián)蠀^(qū)段范圍已知時，撓度值在各個截面的計算方法。利用midas civil軟件建立梁橋的有限元分析模型，模擬了在不同下?lián)狭恐岛拖聯(lián)蠀^(qū)段范圍內(nèi)，主梁整體下?lián)虾途植肯聯(lián)蠈α簶蚪Y(jié)構(gòu)各控制截面內(nèi)力的影響及其內(nèi)力變化規(guī)律。 ⑤分析了拱橋和梁橋的結(jié)構(gòu)線形指標(biāo)在我國橋梁技術(shù)狀況評價體系中的現(xiàn)狀，分別建立了拱橋和梁橋的層次分析模型，并將結(jié)構(gòu)線形指標(biāo)單獨進(jìn)行分析，提出通過引入結(jié)構(gòu)線形影響因子參數(shù)αg和αl來探討基于結(jié)構(gòu)線形指標(biāo)量化后的橋梁技術(shù)狀況的評價方法。
[Abstract]:Due to the influence of many internal and external factors on bridge structure, the structure alignment will change more or less. At present, the evaluation index of structure alignment is described by qualitative method in domestic relevant codes. Even though some codes have some quantitative analysis results, but still can not meet the existing bridge technical status evaluation requirements. Through the selection of two more common domestic girder bridge and arch bridge, By using midas civil finite element software, the representative bridge analysis models are established to simulate the changes of various structural lines that may occur in the state of bridge formation, and to study the variation law of the internal force of the bridge structure after the change of the structure line shape. The corresponding analytic hierarchy process (AHP) model is established, and the evaluation method of bridge technical condition based on the change of structure alignment is put forward by introducing the parameters of linear influence factors. The main contents of this paper are as follows:. The main contents are as follows: (1) the significance, importance and research history of the quantitative evaluation of the existing bridges' technical status are briefly introduced, and the evaluation methods, theories and some shortcomings in the existing domestic norms for the evaluation of the technical status of bridges are briefly introduced. This paper briefly introduces three kinds of common forms of bridge structure linear change, and analyzes the causes of bridge structure linear shape change in the later stage from the aspects of prestress loss, concrete shrinkage and creep, design theory, construction and later operation management. 3. This paper introduces several modes of arch ring deflection of arch bridge structure, and selects the fold-line downwarping mode to distribute the deflection value of each section of the main arch ring. The finite element analysis model of arch bridge is established by using midas civil software. The effects of the global and local torsion of the main arch ring on the internal forces of the control sections of the arch bridge structure and the variation of the internal forces are simulated. In this paper, two possible modes of deflection under beam and bridge structure are briefly introduced, and the formulas for calculating deflection under deflection curve are emphatically introduced and deduced, and the maximum value of current deflection and the range of deflection section are given when the maximum value of current deflection and the range of deflection section are known. The finite element analysis model of beam bridge is established by using midas civil software. The influence of the global and local deflection of the main beam on the internal forces of each control section of the girder bridge and the variation of the internal forces. 5. The present situation of the structural alignment index of arch bridge and beam bridge in the evaluation system of bridge technical condition in China is analyzed. The analytic hierarchy process (AHP) model of arch bridge and beam bridge is established, and the structural alignment index is analyzed separately. The evaluation method of bridge technical condition based on the quantization of structural linear index is proposed by introducing the parameters 偽 g and 偽 l of the structural linear influence factor.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441
【參考文獻(xiàn)】
相關(guān)期刊論文 前2條
1 李祚泳;層次分析法(AHP)及其最新進(jìn)展[J];成都?xì)庀髮W(xué)院學(xué)報;1992年04期
2 司秀勇;王高續(xù);施洲;;鋼筋混凝土拱橋的檢測與評估研究[J];鐵道建筑;2011年09期
本文編號：1685278
本文鏈接：http://sikaile.net/kejilunwen/jiaotonggongchenglunwen/1685278.html
最近更新
教材專著
