混合梁斜拉橋鋼—混結(jié)合段受力特性及試驗(yàn)?zāi)Ｐ头桨秆芯?/H1>
發(fā)布時(shí)間：2018-02-25 07:10
本文關(guān)鍵詞： 鋼-混結(jié)合段 受力特性 模型試驗(yàn) 應(yīng)力等效 應(yīng)力分布 出處：《西南交通大學(xué)》2017年碩士論文 論文類型：學(xué)位論文
【摘要】：混合梁斜拉橋中混凝土邊跨有壓重的作用,平衡中跨受力,鋼-混結(jié)合段是混合梁斜拉橋的重要組成部分,其構(gòu)造形式復(fù)雜,應(yīng)力分布復(fù)雜,目前國(guó)內(nèi)大跨度鐵路混合梁斜拉橋應(yīng)用相對(duì)較少,其鋼-混結(jié)合段的受力特性研究相對(duì)較少。潭江特大橋是鐵路斜拉橋采用鋼-混結(jié)合段的橋例,該鋼-混結(jié)合段采用有格室前后承壓板式的形式構(gòu)造,目前對(duì)于鐵路斜拉橋鋼-混結(jié)合段的研究較為缺乏,同時(shí)也缺乏對(duì)有格室前后承壓板式鋼-混結(jié)合段受力特性的研究,基于上述情況,本文以潭江特大橋?yàn)楣こ瘫尘?對(duì)其鋼-混結(jié)合段的組成構(gòu)件的受力特性進(jìn)行研究,并進(jìn)行試驗(yàn)?zāi)Ｐ偷姆桨冈O(shè)計(jì)。本文主要的研究?jī)?nèi)容及研究結(jié)論如下:1、通過(guò)建立潭江特大橋鋼-混結(jié)合段的有限元模型,研究鋼-混結(jié)合段鋼箱梁外表面板、剛度過(guò)渡段、前后承壓板、結(jié)合段內(nèi)鋼格室縱隔板、縱腹板以及混凝土梁等組成構(gòu)件在主力+附件力最大正彎矩和主力+附加力最大負(fù)彎矩兩種工況下的應(yīng)力分布狀態(tài),分析了各組成構(gòu)件的應(yīng)力分布規(guī)律,研究了各組成構(gòu)件的應(yīng)力變化趨勢(shì)。2、對(duì)潭江特大橋有格室前后承壓板式鋼-混結(jié)合段的試驗(yàn)?zāi)Ｐ头桨高M(jìn)行研究。針對(duì)該鋼-混結(jié)合段的結(jié)構(gòu)特點(diǎn)和受力特性,設(shè)計(jì)試驗(yàn)?zāi)Ｐ?通過(guò)兩個(gè)試驗(yàn)?zāi)Ｐ头桨傅膶?duì)比計(jì)算分析,最終選取試驗(yàn)?zāi)Ｐ头桨付䴙樵撲?混結(jié)合段的試驗(yàn)?zāi)Ｐ?并確定了模型試驗(yàn)的測(cè)試方案及加載方案。3、通過(guò)對(duì)潭江特大橋鋼-混結(jié)合段試驗(yàn)?zāi)Ｐ偷挠邢拊治?分析試驗(yàn)?zāi)Ｐ驮?.0倍設(shè)計(jì)荷載工況下和原橋結(jié)構(gòu)的應(yīng)力等效性,試驗(yàn)?zāi)Ｐ偷匿撓淞和獗砻姘�、剛度過(guò)渡段、前后承壓板、結(jié)合段內(nèi)鋼格室縱隔板、縱腹板以及混凝土梁等組成構(gòu)件與原橋結(jié)構(gòu)的應(yīng)力分布狀態(tài)相似,應(yīng)力提取點(diǎn)的應(yīng)力值與原橋結(jié)構(gòu)接近,應(yīng)力變化趨勢(shì)和原橋結(jié)構(gòu)相近,具有較好的應(yīng)力等效性。
[Abstract]:In hybrid girder cable-stayed bridge, the concrete side span has the action of compressive weight, the balanced middle span is subjected to force, the steel-concrete composite section is an important part of the hybrid beam cable-stayed bridge, its structure form is complex, and the stress distribution is complex. At present, the application of large-span railway hybrid girder cable-stayed bridge is relatively few, and the research on the mechanical characteristics of the steel-concrete joint section is relatively few. The Tanjiang Bridge is an example of railway cable-stayed bridge with steel-concrete composite section. The steel-concrete joint section is constructed in the form of latticed chamber in front and back bearing plate type. At present, the research on steel-concrete joint section of railway cable-stayed bridge is relatively scarce, and the study on the mechanical characteristics of the steel concrete composite section with latticed chamber before and after compression plate type is also lacking. Based on the above situation, this paper takes the Tanjiang Bridge as the engineering background to study the mechanical characteristics of the components of the steel-concrete joint section. The main research contents and conclusions of this paper are as follows: 1. By establishing the finite element model of steel-concrete joint section of Tanjiang super bridge, the external slab and stiffness transition section of steel box girder in steel-concrete joint section are studied. The stress distribution state of the front and rear bearing plate, the steel compartment mediastinal plate, the longitudinal web plate and the concrete beam under the two working conditions of the maximum positive bending moment of the main force attached to the main force and the maximum negative moment of the main additional force, The stress distribution of each component is analyzed. In this paper, the stress variation trend of each component is studied. The experimental model scheme of the front and rear bearing plate steel-concrete joint section of Tanjiang super bridge with latticed chambers is studied. According to the structural characteristics and mechanical characteristics of the steel-concrete joint section, the test model is designed. Through the comparative calculation and analysis of the two test model schemes, the second test model scheme is selected as the test model of the steel-mixing joint section. The test scheme and loading scheme of the model test are determined. Through the finite element analysis of the test model of the steel-concrete section of Tanjiang super bridge, the stress equivalence between the test model and the original bridge structure under 1.0 times design load condition is analyzed. The stress distribution of the steel box girder exterior panel, the stiffness transition section, the front and rear bearing plate, the steel compartment mediastinal plate, the longitudinal web plate and the concrete beam of the test model is similar to that of the original bridge structure. The stress value of the stress extraction point is close to that of the original bridge structure, and the stress variation trend is similar to that of the original bridge structure, and the stress is equivalent to that of the original bridge structure.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U448.27
【參考文獻(xiàn)】
相關(guān)期刊論文 前2條
1 江祥林;劉玉擎;孫璇;;混合梁結(jié)合部受力機(jī)理模型試驗(yàn)研究[J];土木建筑與環(huán)境工程;2014年06期
2 張景峰;李小珍;肖林;鮑宇文;;混合梁斜拉橋鋼-混結(jié)合段受力行為仿真分析[J];西南交通大學(xué)學(xué)報(bào);2014年04期
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本文編號(hào)：1533466
本文鏈接：http://sikaile.net/kejilunwen/daoluqiaoliang/1533466.html
本文關(guān)鍵詞： 鋼-混結(jié)合段 受力特性 模型試驗(yàn) 應(yīng)力等效 應(yīng)力分布 出處：《西南交通大學(xué)》2017年碩士論文 論文類型：學(xué)位論文
【摘要】：混合梁斜拉橋中混凝土邊跨有壓重的作用,平衡中跨受力,鋼-混結(jié)合段是混合梁斜拉橋的重要組成部分,其構(gòu)造形式復(fù)雜,應(yīng)力分布復(fù)雜,目前國(guó)內(nèi)大跨度鐵路混合梁斜拉橋應(yīng)用相對(duì)較少,其鋼-混結(jié)合段的受力特性研究相對(duì)較少。潭江特大橋是鐵路斜拉橋采用鋼-混結(jié)合段的橋例,該鋼-混結(jié)合段采用有格室前后承壓板式的形式構(gòu)造,目前對(duì)于鐵路斜拉橋鋼-混結(jié)合段的研究較為缺乏,同時(shí)也缺乏對(duì)有格室前后承壓板式鋼-混結(jié)合段受力特性的研究,基于上述情況,本文以潭江特大橋?yàn)楣こ瘫尘?對(duì)其鋼-混結(jié)合段的組成構(gòu)件的受力特性進(jìn)行研究,并進(jìn)行試驗(yàn)?zāi)Ｐ偷姆桨冈O(shè)計(jì)。本文主要的研究?jī)?nèi)容及研究結(jié)論如下:1、通過(guò)建立潭江特大橋鋼-混結(jié)合段的有限元模型,研究鋼-混結(jié)合段鋼箱梁外表面板、剛度過(guò)渡段、前后承壓板、結(jié)合段內(nèi)鋼格室縱隔板、縱腹板以及混凝土梁等組成構(gòu)件在主力+附件力最大正彎矩和主力+附加力最大負(fù)彎矩兩種工況下的應(yīng)力分布狀態(tài),分析了各組成構(gòu)件的應(yīng)力分布規(guī)律,研究了各組成構(gòu)件的應(yīng)力變化趨勢(shì)。2、對(duì)潭江特大橋有格室前后承壓板式鋼-混結(jié)合段的試驗(yàn)?zāi)Ｐ头桨高M(jìn)行研究。針對(duì)該鋼-混結(jié)合段的結(jié)構(gòu)特點(diǎn)和受力特性,設(shè)計(jì)試驗(yàn)?zāi)Ｐ?通過(guò)兩個(gè)試驗(yàn)?zāi)Ｐ头桨傅膶?duì)比計(jì)算分析,最終選取試驗(yàn)?zāi)Ｐ头桨付䴙樵撲?混結(jié)合段的試驗(yàn)?zāi)Ｐ?并確定了模型試驗(yàn)的測(cè)試方案及加載方案。3、通過(guò)對(duì)潭江特大橋鋼-混結(jié)合段試驗(yàn)?zāi)Ｐ偷挠邢拊治?分析試驗(yàn)?zāi)Ｐ驮?.0倍設(shè)計(jì)荷載工況下和原橋結(jié)構(gòu)的應(yīng)力等效性,試驗(yàn)?zāi)Ｐ偷匿撓淞和獗砻姘�、剛度過(guò)渡段、前后承壓板、結(jié)合段內(nèi)鋼格室縱隔板、縱腹板以及混凝土梁等組成構(gòu)件與原橋結(jié)構(gòu)的應(yīng)力分布狀態(tài)相似,應(yīng)力提取點(diǎn)的應(yīng)力值與原橋結(jié)構(gòu)接近,應(yīng)力變化趨勢(shì)和原橋結(jié)構(gòu)相近,具有較好的應(yīng)力等效性。
[Abstract]:In hybrid girder cable-stayed bridge, the concrete side span has the action of compressive weight, the balanced middle span is subjected to force, the steel-concrete composite section is an important part of the hybrid beam cable-stayed bridge, its structure form is complex, and the stress distribution is complex. At present, the application of large-span railway hybrid girder cable-stayed bridge is relatively few, and the research on the mechanical characteristics of the steel-concrete joint section is relatively few. The Tanjiang Bridge is an example of railway cable-stayed bridge with steel-concrete composite section. The steel-concrete joint section is constructed in the form of latticed chamber in front and back bearing plate type. At present, the research on steel-concrete joint section of railway cable-stayed bridge is relatively scarce, and the study on the mechanical characteristics of the steel concrete composite section with latticed chamber before and after compression plate type is also lacking. Based on the above situation, this paper takes the Tanjiang Bridge as the engineering background to study the mechanical characteristics of the components of the steel-concrete joint section. The main research contents and conclusions of this paper are as follows: 1. By establishing the finite element model of steel-concrete joint section of Tanjiang super bridge, the external slab and stiffness transition section of steel box girder in steel-concrete joint section are studied. The stress distribution state of the front and rear bearing plate, the steel compartment mediastinal plate, the longitudinal web plate and the concrete beam under the two working conditions of the maximum positive bending moment of the main force attached to the main force and the maximum negative moment of the main additional force, The stress distribution of each component is analyzed. In this paper, the stress variation trend of each component is studied. The experimental model scheme of the front and rear bearing plate steel-concrete joint section of Tanjiang super bridge with latticed chambers is studied. According to the structural characteristics and mechanical characteristics of the steel-concrete joint section, the test model is designed. Through the comparative calculation and analysis of the two test model schemes, the second test model scheme is selected as the test model of the steel-mixing joint section. The test scheme and loading scheme of the model test are determined. Through the finite element analysis of the test model of the steel-concrete section of Tanjiang super bridge, the stress equivalence between the test model and the original bridge structure under 1.0 times design load condition is analyzed. The stress distribution of the steel box girder exterior panel, the stiffness transition section, the front and rear bearing plate, the steel compartment mediastinal plate, the longitudinal web plate and the concrete beam of the test model is similar to that of the original bridge structure. The stress value of the stress extraction point is close to that of the original bridge structure, and the stress variation trend is similar to that of the original bridge structure, and the stress is equivalent to that of the original bridge structure.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U448.27
【參考文獻(xiàn)】
相關(guān)期刊論文 前2條
1 江祥林;劉玉擎;孫璇;;混合梁結(jié)合部受力機(jī)理模型試驗(yàn)研究[J];土木建筑與環(huán)境工程;2014年06期
2 張景峰;李小珍;肖林;鮑宇文;;混合梁斜拉橋鋼-混結(jié)合段受力行為仿真分析[J];西南交通大學(xué)學(xué)報(bào);2014年04期
，本文編號(hào)：1533466
本文鏈接：http://sikaile.net/kejilunwen/daoluqiaoliang/1533466.html
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