本文選題：自錨式懸索橋　切入點：MIDAS　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：自錨式懸索橋的隨著橋跨的增加,加勁梁的軸向應(yīng)力加大和體系的轉(zhuǎn)換更加困難的特點,已成為設(shè)計的控制關(guān)鍵點,大跨度空間纜索自錨式懸索橋的施工將面臨更大的挑戰(zhàn)。因此,提高材料強(qiáng)度,增加跨越能力,減少靜荷載,研究和開發(fā)新材料,以及方便的系統(tǒng)轉(zhuǎn)換和加快施工進(jìn)度等,都是未來研究的重要課題。本文進(jìn)行了施工階段受力分析法及無應(yīng)力狀態(tài)法在自錨式懸索橋施工階段應(yīng)用研究,研究工作及結(jié)論如下:①本文梳理了自錨式懸索橋的結(jié)構(gòu)特征、發(fā)展歷程、結(jié)構(gòu)類型和計算理論方法,文章把無應(yīng)力狀態(tài)法的理念引入到自錨式懸索橋的施工作業(yè)中,并進(jìn)行了簡單的理論推導(dǎo)。②本文以吉林松原天河大橋自錨式懸索橋為例,用MIDAS常用有限元軟件進(jìn)行模型的建立,進(jìn)行建模流程和選取單元原則分析。③運(yùn)用有限元的計算理論和大型有限元軟件,研究了大跨度空間纜索自錨式懸索橋在施工階段的受力分析,得到自重與移動荷載作用下,懸索橋各個重要位置的內(nèi)力,撓度,支點反力等參數(shù)的變化規(guī)律。④運(yùn)用無應(yīng)力狀態(tài)法對自錨式懸索橋進(jìn)行荷載效應(yīng)研究,進(jìn)行無應(yīng)力狀態(tài)法在自錨式懸索橋施工階段應(yīng)用的探討,表明自錨式懸索橋應(yīng)用無應(yīng)力狀態(tài)法的可行性。⑤文章對自錨式懸索橋的吊桿張拉施工進(jìn)行的研究,其中無預(yù)偏施工法簡化了施工步驟,還能夠加快施工的進(jìn)程。本文中所用的案例比較特殊,它是大跨度空間纜索自錨式懸索橋,其結(jié)構(gòu)特征與一般自錨式懸索橋的結(jié)構(gòu)特性相比就比較新穎。文章里還提出了解決自錨式懸索橋工程實際問題的新思想、新方法。一方面將無應(yīng)力施工法的理念引入進(jìn)來,從另外一個角度上進(jìn)行自錨式懸索橋的施工控制;另外一個方面是吊索的張拉次序調(diào)整與無索鞍預(yù)偏的作業(yè)方法的結(jié)合,給自錨式懸索橋施工提供的新的思路。
[Abstract]:With the increase of the span of the self-anchored suspension bridge, the increasing axial stress of the stiffened beam and the transformation of the system are more difficult, which has become the key point of the design. The construction of long-span space cable self-anchored suspension bridge will face more challenges. Therefore, improving material strength, increasing span capacity, reducing static load, researching and developing new materials, convenient system conversion and speeding up construction progress, etc. This paper studies the application of stress analysis and stress state method in the construction stage of self-anchored suspension bridge. The research work and conclusion are as follows: 1 this paper combs the structural characteristics of self-anchored suspension bridge. In this paper, the concept of no-stress state method is introduced into the construction operation of self-anchored suspension bridge, and a simple theoretical derivation of .2 this paper takes the self-anchored suspension bridge of Songyuan Tianhe Bridge in Jilin Province as an example. The modeling process and the principle of selecting the element are analyzed by using the finite element software (MIDAS), and the finite element theory and the large-scale finite element software are used to analyze the modeling flow and the selection of the element principle. The internal force and deflection of each important position of the suspension bridge under the action of deadweight and moving load are obtained by studying the stress analysis of the long-span space cable self-anchored suspension bridge in the construction stage. The variation regularity of parameters such as fulcrum reaction. .4 the load effect of self-anchored suspension bridge is studied by using the non-stress state method, and the application of the no-stress state method in the construction stage of self-anchored suspension bridge is discussed. It shows that the self-anchored suspension bridge is feasible to use the stress-free state method. 5. The paper studies the construction of the self-anchored suspension bridge with the suspension rod tension, in which the construction procedure is simplified by the method of no pre-bias construction. It can also speed up the construction process. The case used in this paper is quite special. It is a long-span space cable self-anchored suspension bridge. Compared with the general self-anchored suspension bridge, its structural characteristics are relatively new. In this paper, a new idea and a new method to solve the practical problems of self-anchored suspension bridge are put forward. On the one hand, the concept of no-stress construction method is introduced. The construction control of the self-anchored suspension bridge is carried out from another angle, the other aspect is the combination of the tension sequence adjustment of the sling and the operation method of pre-deflection without saddle, which provides a new way of thinking for the construction of the self-anchored suspension bridge.
【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】：2015
【分類號】：U441;U448.25

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