本文選題：索輔梁橋　切入點：敏感性參數(shù)　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：索輔梁橋是一種新興的斜拉橋結(jié)構(gòu)類型，這類橋梁結(jié)合了常規(guī)斜拉橋和梁橋的結(jié)構(gòu)優(yōu)點，并在其優(yōu)點的基礎(chǔ)上充分發(fā)揮自身優(yōu)勢，使得該類橋梁的應(yīng)用前景變得愈來愈廣闊。就其結(jié)構(gòu)形式而言，主梁高度較大，索塔較高，拉索相對較多；就其結(jié)構(gòu)受力特性而言，由于主梁高度較大，主梁承擔(dān)很大一部分的內(nèi)力，拉索作為輔助承重結(jié)構(gòu)體系，也要承受很大的拉力。當(dāng)該類橋型不再是單一用途，而是公軌兩用時，主梁的高度就要增大，相應(yīng)的主梁的剛度增大，具有較大的抗彎、抗扭能力，并且需要拉索將主梁的剛度進(jìn)一步增強(qiáng)，因此，該類橋型能夠?qū)⒗骱椭髁河行У慕Y(jié)合起來，使得此類橋的跨度更大，結(jié)構(gòu)受力更加合理。 本篇文章選取重慶市東水門長江大橋為依托項目，通過對其較為詳盡的理論分析研究，得出該橋各項理論計算值；在此基礎(chǔ)上，通過對其進(jìn)一步的研究分析，最終得出該橋橋梁各項參數(shù)較為合理的設(shè)計值，用以支持該類橋梁的設(shè)計施工。東水門大橋主橋的用途為公軌兩用，索面為單索面，因此在公路和軌道交通荷載作用下，對該類斜拉橋結(jié)構(gòu)提出了更高的要求，結(jié)合該橋的結(jié)構(gòu)特點，，從橋梁的各個結(jié)構(gòu)參數(shù)出發(fā)研究其對橋梁合理受力體系的影響，通過對結(jié)構(gòu)設(shè)計參數(shù)的研究分析，最終提取合理的結(jié)構(gòu)設(shè)計參數(shù)。本文著重研究的參數(shù)主要有：主梁高度和主梁跨徑之比、主塔高度和主梁跨徑之比、無索區(qū)長度以及主梁與索塔的剛度之比等。從而總結(jié)出東水門長江大橋整體結(jié)構(gòu)的受力特性與合理受力體系，為同類型橋梁的設(shè)計提供一定參考。 本文選取的結(jié)構(gòu)受力指標(biāo)為主梁跨中正彎矩的最值、塔根支座處負(fù)彎矩的最值、主梁跨中的豎向撓度以及索塔底部的彎矩，這些內(nèi)力指標(biāo)對結(jié)構(gòu)設(shè)計參數(shù)調(diào)整是非常敏感的，因此這類指標(biāo)在結(jié)構(gòu)分析研究的過程中必須加以進(jìn)行必要的考慮。由于在總結(jié)分析過程中，指標(biāo)的數(shù)據(jù)比較龐大，其內(nèi)力及位移的單位也不盡相同，因此為使研究方便，本文選取的受力指標(biāo)均轉(zhuǎn)換為無量綱指標(biāo)，通過對這些無量綱指標(biāo)的研究分析，從而得出索輔梁橋的合理受力體系。
[Abstract]:Cable-assisted girder bridge is a new type of cable-stayed bridge, which combines the structural advantages of conventional cable-stayed bridge and beam bridge, and gives full play to its own advantages on the basis of its advantages. The application prospect of this kind of bridge becomes wider and wider. In terms of its structural form, the height of the main girder is larger, the cable tower is higher, the cable is relatively more, and in terms of the structural characteristics of the bridge, the height of the main beam is larger. The girder bears a large part of the internal force, and the cable, as an auxiliary load-bearing structure system, also has to bear a great amount of tension. When this type of bridge is no longer a single purpose, but a common rail, the height of the main beam will increase. The stiffness of the corresponding main beam is increased, which has the ability to resist bending and torsion, and the stiffness of the main beam needs to be further strengthened by the cable. Therefore, this kind of bridge type can effectively combine the cable with the main beam, and make the span of this kind of bridge larger. The force on the structure is more reasonable. This article selects the Dongshuimen Yangtze River Bridge in Chongqing as the project, through the detailed theoretical analysis and research, obtains the bridge each theoretical calculation value, on this basis, through the further research analysis, Finally, the reasonable design value of the bridge parameters is obtained to support the design and construction of this kind of bridge. The main bridge of Dongshuimen Bridge is used for both common rail and single cable plane, so under the action of highway and rail traffic load, Higher requirements are put forward for this kind of cable-stayed bridge structure. According to the structural characteristics of the bridge, the influence of each structural parameter of the bridge on the reasonable stress system of the bridge is studied, and the structural design parameters are studied and analyzed. The main parameters studied in this paper are the ratio of the height of the main beam to the span of the main beam, the ratio of the height of the main tower to the span of the main beam, the ratio of the height of the main tower to the span of the main beam. The length of the cable free zone and the ratio of the stiffness of the main girder to the cable tower are summarized. The stress characteristics and reasonable stress system of the whole structure of the Dongshuimen Yangtze River Bridge are summarized, which provides a certain reference for the design of the same type of bridge. The structural force index selected in this paper is the maximum value of the positive moment in the span of the main beam, the maximum value of the negative moment at the root support of the tower, the vertical deflection in the span of the main beam and the bending moment at the bottom of the cable tower. These internal force indexes are very sensitive to the adjustment of the structural design parameters. Therefore, the necessary consideration must be given to this kind of index in the process of structural analysis and research. Because the data of the index is quite large in the process of summing up and analyzing, the units of internal force and displacement are different, so it is convenient to study. The force indexes selected in this paper are all converted into dimensionless indexes. Through the research and analysis of these dimensionless indexes, the reasonable force system of cable-assisted girder bridges is obtained.
【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】：2014
【分類號】：U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 韓富慶,胡可,寇明國;安慶長江公路大橋主橋施工控制仿真計算[J];安徽建筑工業(yè)學(xué)院學(xué)報(自然科學(xué)版);2002年03期

2 梁志廣,李建中,石現(xiàn)峰;斜拉橋施工初始索力的確定[J];工程力學(xué);2000年03期

3 汪學(xué)著;林韜;;高塔型部分斜拉橋設(shè)計與結(jié)構(gòu)分析[J];公路交通科技(應(yīng)用技術(shù)版);2011年10期

4 劉世忠;陳權(quán);李少波;;同安銀湖獨塔單索面部分斜拉橋[J];公路交通科技;2006年05期

5 胡建華,廖建宏;多塔斜拉橋關(guān)鍵技術(shù)研究[J];中外公路;2002年03期

6 陳愛軍;邵旭東;;無背索豎琴式斜拉橋合理結(jié)構(gòu)體系分析[J];中外公路;2009年04期

7 王燦;劉永健;王瑩;劉亮;;斜塔有背索斜拉橋結(jié)構(gòu)參數(shù)敏感性分析[J];世界橋梁;2013年02期

8 魏紅一,胡世德,范立礎(chǔ);對斜拉橋總體設(shè)計參數(shù)的討論[J];結(jié)構(gòu)工程師;2003年03期

9 肖汝誠,項海帆;斜拉橋索力優(yōu)化的影響矩陣法[J];同濟(jì)大學(xué)學(xué)報(自然科學(xué)版);1998年03期

10 陳德偉,范立礎(chǔ),張權(quán);獨塔斜拉橋的總體布置和參數(shù)研究[J];土木工程學(xué)報;1999年03期

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