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  本文選題：波形鋼腹板連續(xù)剛構(gòu)橋　切入點：長期徐變效應(yīng)　出處：《西南交通大學》2017年碩士論文　論文類型：學位論文

【摘要】：與混凝土腹板連續(xù)剛構(gòu)橋相比,波形鋼腹板連續(xù)剛構(gòu)橋的優(yōu)點突出,在我國的工程實踐中應(yīng)用逐漸增多。這種結(jié)構(gòu)由頂?shù)装寤炷梁筒ㄐ武摳拱褰M成,其徐變特性可能不同于傳統(tǒng)混凝土腹板,有必要對其長期徐變進行深入研究。本文以擬建李渡大橋(主跨190m大跨度波形鋼腹板連續(xù)剛構(gòu)橋)為工程背景,采用有限元分析軟件Midas和Ansys,對大跨度波形鋼腹板連續(xù)剛構(gòu)橋的長期徐變效應(yīng)進行研究。主要的研究工作如下:(1)簡要介紹了波形鋼腹板PC組合箱梁結(jié)構(gòu)的發(fā)展和結(jié)構(gòu)特點,總結(jié)了國內(nèi)外對于徐變的研究現(xiàn)狀,明確了本文的主要研究內(nèi)容。(2)對混凝土徐變的概念、徐變機理和徐變計算理論進行了闡述,并簡要敘述了不同徐變計算理論的優(yōu)缺點。(3)采用有限元分析軟件Midas,建立李渡大橋的梁單元模型,分析了徐變對于結(jié)構(gòu)的豎向撓度、內(nèi)力、應(yīng)力和預(yù)應(yīng)力損失的影響。(4)簡要敘述了徐變的影響因素,收集了目前主流的徐變預(yù)測模型,對部分影響因素進行了敏感性分析。(5)采用有限元分析軟件Ansys,建立李渡大橋的三維實體模型,通過顯式蠕變和按齡期調(diào)整的有效模量法,分析了在徐變作用下跨中撓度、應(yīng)力和波形鋼腹板應(yīng)力隨時間的變化。
[Abstract]:Compared with the concrete web continuous rigid frame bridge, the corrugated steel web continuous rigid frame bridge has outstanding advantages and has been used in our country's engineering practice more and more. This kind of structure is composed of top and bottom slab concrete and corrugated steel web plate. The creep behavior of the bridge may be different from that of the traditional concrete web, so it is necessary to study its long-term creep. In this paper, the proposed Lidu Bridge (the main span of 190m long span continuous rigid frame bridge of corrugated steel web) is taken as the engineering background. The long-term creep effect of long-span corrugated steel web continuous rigid frame bridge is studied by using finite element analysis software Midas and ANSYS. The main research work is as follows: 1) the development and structural characteristics of corrugated steel web PC composite box girder structure are briefly introduced. This paper summarizes the research status of creep both at home and abroad, and clarifies the main research contents of this paper, including the concept of creep, creep mechanism and creep calculation theory. The advantages and disadvantages of different creep calculation theories are briefly described. The finite element analysis software Midas. is used to establish the beam element model of the Lidu Bridge, and the vertical deflection and internal force of the creep to the structure are analyzed. The influence of stress and prestress loss on creep is briefly described, and the current mainstream creep prediction models are collected. Sensitivity analysis of some influencing factors. 5) using finite element analysis software Ansys, the three-dimensional solid model of Lidu Bridge is established. Through explicit creep and effective modulus method adjusted according to age, the mid-span deflection under creep action is analyzed. The variation of stress and stress of corrugated steel web with time.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U441;U448.23

【參考文獻】

相關(guān)期刊論文 前10條

1 卓旬;梅明榮;;混凝土徐變計算理論和方法綜述[J];水利與建筑工程學報;2012年02期

2 饒瑞;劉愛榮;王榮輝;;幾種老化系數(shù)計算方法的比較[J];廣州大學學報(自然科學版);2011年04期

3 李淑琴;陳建兵;萬水;陳華利;;我國幾座波形鋼腹板PC組合箱梁橋的設(shè)計與建造[J];工程力學;2009年S1期

4 譚文輝;李達;;鋼-混凝土組合梁非線性變形研究[J];工程力學;2008年S1期

5 李立峰;王芳;劉志才;;體外預(yù)應(yīng)力波形鋼腹板組合箱梁徐變性能研究[J];湖南大學學報(自然科學版);2008年05期

6 溫慶杰;葉見曙;;鋼-混凝土組合梁的收縮徐變效應(yīng)分析[J];工業(yè)建筑;2006年S1期

7 余楨;曾昭敢;葉常青;萬水;;波形鋼腹板PC組合箱梁力學性能研究[J];中南公路工程;2006年02期

8 余杰;韓勇;王文林;萬水;李超;余曉紅;蔣麗娟;;潑河大橋的構(gòu)造與施工[J];交通科技;2005年06期

9 陳寶春,黃卿維;波形鋼腹板PC箱梁橋應(yīng)用綜述[J];公路;2005年07期

10 黃卿維,陳寶春;日本前谷橋的設(shè)計與施工[J];福建建筑;2005年01期

，

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