本文選題：寬箱梁　切入點(diǎn)：單箱三室　出處：《蘭州交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著交通科技的發(fā)展，寬跨比較大的箱形梁應(yīng)用的越來(lái)越廣泛，合理的截面形式及空間預(yù)應(yīng)力束布置對(duì)寬箱梁的力學(xué)性能有著重要的影響。對(duì)于預(yù)應(yīng)力混凝土寬箱梁結(jié)構(gòu)，在主梁自重、二期恒載、預(yù)應(yīng)力、溫度效應(yīng)及車輛等荷載的作用下，梁體橫向空間效應(yīng)非常顯著，傳統(tǒng)的梁?jiǎn)卧治龇椒ㄒ巡荒軠?zhǔn)確地分析出寬體箱梁橫向應(yīng)力的分布情況，該方法對(duì)結(jié)構(gòu)橫向的受力分析主要利用橫向框架分析模塊，其計(jì)算結(jié)果精確度較低，無(wú)法保證寬箱梁結(jié)構(gòu)的局部受力安全。因此，在設(shè)計(jì)該類橋梁時(shí)，必須充分考慮主梁的空間效應(yīng)，合理布置普通鋼筋和預(yù)應(yīng)力束，確保橋梁結(jié)構(gòu)在施工階段及成橋運(yùn)營(yíng)階段的安全。本論文主要完成的工作如下： 1、本文首先介紹了箱形截面的結(jié)構(gòu)特點(diǎn)及受力特點(diǎn)，并對(duì)寬箱梁空間受力狀態(tài)及預(yù)應(yīng)力鋼束布置的研究現(xiàn)狀做出了總結(jié)。闡述了幾種常用的分析寬箱梁橋受力特性的方法，根據(jù)實(shí)際工程中存在的問(wèn)題和不足，詮釋了對(duì)寬箱梁進(jìn)行深入研究的意義。 2、本文以南京地鐵三號(hào)線高架區(qū)間交叉渡線區(qū)3×30m連續(xù)寬箱梁橋?yàn)楣こ瘫尘�，�?yīng)用空間有限元程序Midas/FEA，，對(duì)全橋單箱三室箱形主梁建立了三維有限元模型進(jìn)行空間應(yīng)力分析，通過(guò)對(duì)比分析總結(jié)了此類寬箱梁橋的空間應(yīng)力分布特點(diǎn)及規(guī)律，找出了該橋受力較為不利的部位。 3、在原結(jié)構(gòu)有限元分析模型的基礎(chǔ)上，通過(guò)變化斜腹板傾斜角度等參數(shù)，對(duì)比分析了不同工況下主梁應(yīng)力的變化情況，得出了適合本橋箱形主梁的斜腹板傾斜角度。 4、對(duì)寬箱梁結(jié)構(gòu)的預(yù)應(yīng)力效應(yīng)進(jìn)行了分析，分析縱向預(yù)應(yīng)力束不同配筋方式以及配置橫向預(yù)應(yīng)力束前后對(duì)寬箱梁的應(yīng)力狀態(tài)及結(jié)構(gòu)變形的影響，最后總結(jié)出了較為合理的預(yù)應(yīng)力體系。 通過(guò)上述分析，明確了單箱三室寬箱梁結(jié)構(gòu)的空間應(yīng)力狀態(tài)，找出了較為合理的截面形式和預(yù)應(yīng)力體系。希望本研究結(jié)果能為以后同類橋梁的設(shè)計(jì)提供參考。
[Abstract]:With the development of transportation technology, box beam with wide span is more and more widely used. Reasonable section form and spatial prestressing beam arrangement have important influence on the mechanical properties of wide box girder. Under the influence of deadweight, dead load, prestress, temperature effect and vehicle load, the transverse spatial effect of beam body is very significant. The traditional method of beam element analysis can not accurately analyze the distribution of transverse stress of wide box girder. This method mainly uses the transverse frame analysis module to analyze the transverse force of the structure. The accuracy of the calculation results is low and the local force safety of the wide box girder structure can not be guaranteed. Therefore, in the design of this kind of bridge, The space effect of the main beam must be fully considered, the normal steel bar and prestressing beam should be arranged reasonably to ensure the safety of the bridge structure in the construction stage and the operation stage of the bridge. The main work accomplished in this paper is as follows:. 1. Firstly, this paper introduces the structural characteristics and stress characteristics of box section, summarizes the research status of space stress state of wide box girder and the arrangement of prestressed steel beam, and expounds several common methods to analyze the stress characteristics of wide box girder bridge. According to the existing problems and shortcomings in practical engineering, the significance of deep research on wide box girder is explained. 2. Taking the 3 脳 30m continuous wide box girder bridge in the crossing crossing section of Nanjing Metro Line 3 as the engineering background, the three-dimensional finite element model of the single box and three chamber box girder of the whole bridge is established by using the space finite element program Midas / FEAA. The spatial stress distribution characteristics and rules of this kind of wide box girder bridge are summarized by comparison and analysis, and the unfavorable position of the bridge is found out. 3. On the basis of the finite element analysis model of the original structure, the stress variation of the main beam under different working conditions is compared and analyzed by changing the inclined web angle and other parameters, and the inclined web angle suitable for the box girder of the bridge is obtained. 4. The prestress effect of wide box girder structure is analyzed, and the influence of different reinforcement ways of longitudinal prestressing beam and the influence of transverse prestressing beam on the stress state and structural deformation of wide box girder is analyzed. Finally, the reasonable prestressing system is summarized. Through the above analysis, the spatial stress state of the single box and three chambers wide box girder structure is determined, and a more reasonable section form and prestressing system are found. It is hoped that the results of this study can be used as a reference for the design of similar bridges in the future.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441;U448.213

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 付坤;圓形箱梁斜腹板鋼筋骨架制作[J];建筑工人;2004年06期

2 蘇慶田;楊國(guó)濤;吳沖;;鋼箱組合梁混凝土裂縫特征試驗(yàn)[J];中國(guó)公路學(xué)報(bào);2012年05期

3 吳桂勝;;斜腹板寬箱梁橋全橋?qū)嶓w仿真分析[J];廣東公路交通;2011年02期

4 李瑞林;;箱梁斜腹板中曲線縱向預(yù)應(yīng)力產(chǎn)生的橫向力計(jì)算[J];國(guó)外公路;1988年01期

5 楊霞林,冉琦山;斜腹板傾斜角度對(duì)斜拉橋箱形主梁應(yīng)力的影響[J];蘭州交通大學(xué)學(xué)報(bào);2004年01期

6 王標(biāo)新;朱國(guó)華;;大懸臂展翼斜腹板連續(xù)箱梁在城市橋梁中的設(shè)計(jì)與應(yīng)用[J];中外公路;2010年01期

7 王毅,葉見曙,顧祥峰;橫梁預(yù)應(yīng)力束的平彎對(duì)混凝土斜拉橋邊箱斜腹板的影響[J];交通運(yùn)輸工程學(xué)報(bào);2005年02期

8 楊霞林;李喬;孫學(xué)先;;斜拉橋箱形主梁斜腹板的合理厚度分析[J];鐵道學(xué)報(bào);2006年04期

9 金衛(wèi)兵;胡洋;彭德運(yùn);;某PC斜拉橋錨塊及斜腹板裂縫成因分析[J];中外公路;2011年05期

10 楊霞林;李喬;吳亞平;;斜拉橋箱形主梁尺寸的優(yōu)化分析[J];公路交通科技;2007年10期

相關(guān)會(huì)議論文 前3條

1 薛長(zhǎng)遷;邢金蘭;李亞光;;大斜腹板箱梁施工與應(yīng)用[A];天津市土木工程學(xué)會(huì)第七屆年會(huì)優(yōu)秀論文集[C];2005年

2 董曉軍;何亮;龔旭;鄧銀倫;;曲線鋼箱梁斜腹板展開放樣程序開發(fā)[A];第三屆全國(guó)鋼結(jié)構(gòu)工程技術(shù)交流會(huì)論文集[C];2010年

3 陽(yáng)金星;;淺談斜腹板連續(xù)梁懸灌施工掛籃的錨固方法[A];中鐵五局哈大鐵路客運(yùn)專線施工論文集[C];2010年

相關(guān)碩士學(xué)位論文 前2條

1 寧波;曲線斜腹板箱梁基于梁格法若干問(wèn)題研究[D];長(zhǎng)安大學(xué);2014年

2 徐斌;單箱三室寬箱梁斜腹板傾斜角度優(yōu)化及預(yù)應(yīng)力效應(yīng)分析[D];蘭州交通大學(xué);2014年

本文編號(hào)：1643517