發(fā)布時(shí)間：2018-04-30 04:24

  本文選題：連續(xù)梁橋 + 應(yīng)力分析��； 參考：《昆明理工大學(xué)》2015年碩士論文

【摘要】：連續(xù)梁橋是一種古老的橋型,具有跨徑大,行車(chē)平順等優(yōu)點(diǎn)。隨著預(yù)應(yīng)力混凝土的出現(xiàn),預(yù)應(yīng)力混凝土連續(xù)梁橋具備了變形小,結(jié)構(gòu)剛度好、行車(chē)平順舒適,伸縮縫少,養(yǎng)護(hù)簡(jiǎn)易,抗震能力強(qiáng)等眾多優(yōu)點(diǎn),被廣泛應(yīng)用于工程實(shí)踐中。在鐵路線路的建設(shè)中,鐵路橋梁需要具備結(jié)構(gòu)剛度大,抗扭剛度好,行車(chē)平順性好的橋型,預(yù)應(yīng)力混凝土連續(xù)梁橋往往從眾多備選方案中脫穎而出。尤其是在懸臂、頂推等先進(jìn)施工方法出現(xiàn)后,施工方法更加簡(jiǎn)單易行,施工速度也比以前大大縮短,這也提高了預(yù)應(yīng)力混凝土連續(xù)梁橋在地質(zhì)情況復(fù)雜地區(qū)的適應(yīng)性,大大提高了競(jìng)爭(zhēng)力。本文首先對(duì)連續(xù)梁及預(yù)應(yīng)力混凝土的歷史發(fā)展做了簡(jiǎn)要介紹,闡述了其在作為鐵路橋梁的優(yōu)勢(shì),并對(duì)國(guó)內(nèi)外鐵路連續(xù)梁橋的應(yīng)用與發(fā)展進(jìn)行了歸納與總結(jié)。并以安寧專(zhuān)用線螳螂江特大橋(孔跨6×32+(48+80+51.15)預(yù)應(yīng)力混凝土連續(xù)梁+(51.15+80+48)預(yù)應(yīng)力混凝土連續(xù)梁+1 x32m簡(jiǎn)支T梁,橋梁全長(zhǎng)603.85m)為例,運(yùn)用Midas Civil2011計(jì)算分析軟件進(jìn)行建模和數(shù)值分析,具體內(nèi)容如下：1、介紹了螳螂江特大橋的工程背景,包括地址自然地理概況、地質(zhì)情況等,同時(shí)根據(jù)上述資料確定了線路及橋梁各結(jié)構(gòu)尺寸。2、采用大型通用有限元軟件Midas Civil對(duì)全橋進(jìn)行建模分析,對(duì)各參數(shù)進(jìn)行取值,并模擬了施工的各個(gè)過(guò)程,通過(guò)對(duì)運(yùn)營(yíng)階段、施工階段以及截面強(qiáng)度等方面的應(yīng)力檢算,驗(yàn)證該橋在整體施工和運(yùn)營(yíng)方面的安全性；對(duì)主梁橫向框架模型進(jìn)行了細(xì)致分析,結(jié)果表明主梁橫向框架結(jié)構(gòu)頂板最大壓應(yīng)力、拉應(yīng)力滿(mǎn)足規(guī)范要求；腹板、底板抗裂性也可滿(mǎn)足規(guī)范要求；結(jié)構(gòu)受力安全可靠；根據(jù)有限元計(jì)算模型,進(jìn)行結(jié)構(gòu)動(dòng)力特性分析,得出全橋的前十階振型,根據(jù)計(jì)算結(jié)果可以看出橋橫向剛度滿(mǎn)足行車(chē)舒適性要求。3、對(duì)連續(xù)梁中受力最為復(fù)雜的主梁0#塊段進(jìn)行局部應(yīng)力分析,運(yùn)用MidasFEA軟件建立了有限元模型,對(duì)0#塊段頂板、底板及腹板等構(gòu)件進(jìn)行了驗(yàn)算。4、分別在多遇地震、罕遇地震作用下對(duì)橋梁下部進(jìn)行抗震檢算,并對(duì)支座強(qiáng)度進(jìn)行驗(yàn)算,結(jié)果均能滿(mǎn)足規(guī)范要求,并建議在支座設(shè)計(jì)時(shí)重視其水平承載能力的設(shè)計(jì)和采取相應(yīng)的抗震措施。
[Abstract]:Continuous beam bridge is an ancient bridge type with the advantages of long span and smooth running. With the emergence of prestressed concrete, prestressed concrete continuous beam bridge has many advantages, such as small deformation, good structural stiffness, smooth driving, less expansion joints, easy maintenance, strong seismic capacity and so on, and has been widely used in engineering practice. In the construction of railway lines, railway bridges need bridge type with high structural stiffness, good torsional stiffness and good ride comfort. Prestressed concrete continuous beam bridges often stand out from many alternative schemes. Especially after the emergence of advanced construction methods such as cantilever and push, the construction method is simpler and easier, and the construction speed is much shorter than before, which also improves the adaptability of prestressed concrete continuous beam bridge in areas with complex geological conditions. Greatly improved competitiveness. In this paper, the historical development of continuous beam and prestressed concrete is introduced briefly, its advantages as railway bridge are expounded, and the application and development of railway continuous beam bridge at home and abroad are summarized and summarized. Taking the Mantis River Bridge of the Anning Special Line as an example, the prestressed concrete continuous beam is 1 x 32m simple supported T beam (the span of the hole is 6 脳 32 ~ 48,8051.15) and the bridge is 603.85m in length. Modeling and numerical analysis are carried out by using Midas Civil2011 calculation and analysis software. The concrete contents are as follows: 1. The engineering background of the Mantis River Bridge is introduced, including the natural geography of the address, geological conditions, etc. At the same time, according to the above data, the dimensions of each structure of the line and bridge are determined. The whole bridge is modeled and analyzed by using the large and universal finite element software Midas Civil, and the parameters are calculated, and the construction process is simulated. The safety of the bridge in the whole construction and operation is verified by checking the stress in the construction stage and section strength, and the model of the transverse frame of the main beam is analyzed in detail. The results show that the maximum compressive stress of the roof of the transverse frame structure of the main beam is obtained. The tensile stress can meet the requirements of the code, the web and the bottom plate can also meet the requirements of the code, the structure is safe and reliable, according to the finite element calculation model, the dynamic characteristics of the structure are analyzed, and the first ten vibration modes of the whole bridge are obtained. According to the calculation results, it can be seen that the lateral stiffness of the bridge meets the requirements of driving comfort. The local stress analysis of the 0# section of the main beam with the most complicated force in continuous beam is carried out. The finite element model is established by using MidasFEA software, and the roof of the block is analyzed. The bottom plate, web plate and other components are checked. 4. Under the action of frequent earthquake and rare earthquake, the lower part of the bridge is checked, and the strength of the support is checked. The results can meet the requirements of the code. It is suggested that attention should be paid to the design of the horizontal bearing capacity and the corresponding seismic measures should be taken in the design of the bearing.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U442.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 寧曉駿;周亦唐;李睿;;高烈度區(qū)大跨度剛構(gòu)橋梁的抗震性能研究[J];昆明理工大學(xué)學(xué)報(bào)(理工版);2007年03期

相關(guān)碩士學(xué)位論文 前1條

1 李平;橋梁結(jié)構(gòu)精細(xì)計(jì)算[D];重慶交通大學(xué);2009年

，

本文編號(hào)：1823069