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  本文選題：三塔懸索橋 + 抗滑移��； 參考：《西南交通大學(xué)》2015年碩士論文

【摘要】：由于存在著“中塔效應(yīng)”,三塔懸索橋的行車舒適性要求(撓跨比)與主纜抗滑移安全要求成為一對矛盾體,這使得在三塔懸索橋中主纜與中主鞍座的抗滑移設(shè)計成為主要設(shè)計內(nèi)容之一。影響主纜抗滑移安全的因素主要有結(jié)構(gòu)的總體布置、中塔剛度、主纜與鞍座的名義摩擦系數(shù)、恒載和活載大小、加勁梁的約束體系等。這些因素對主纜與鞍座的抗滑移安全性能的影響規(guī)律需要進行深入的研究和分析。論文簡要介紹了三塔懸索橋的主要力學(xué)特性和主纜與鞍座抗滑移安全問題的研究進展。忽略加勁梁剛度的影響利用疊加原理計算出主纜抗滑移安全最不利加載模式下的主纜張力水平分量、主纜線形和主纜張力,進而得到三塔懸索橋主纜抗滑移安全系數(shù)的估算公式,與有限元法對比表明本文所得公式精度較高。利用此估算公式分析主跨跨度、矢跨比、中塔剛度、恒載和活載對主纜抗滑移安全系數(shù)的影響規(guī)律。論文采用有限元方法對主纜索股與鞍座的摩擦行為進行分析。利用ANSYS大型通用有限元軟件建立單根索股與鞍槽的接觸模型。對主纜與鞍座摩擦模型試驗中單根索股工況進行仿真模擬,得到單根索股在鞍槽內(nèi)滑動過程中的索力、位移曲線。并根據(jù)有限元結(jié)果計算單根索股與鞍槽的名義摩擦系數(shù)。論文以一座主跨800m的三塔懸索橋方案為例,對柔性中塔和剛性中塔方案下的加勁梁約束體系進行研究。對比各約束體系下主纜抗滑移安全系數(shù)以及恒載、溫度荷載、活載作用下約束反力、中塔和主梁應(yīng)力、加勁梁的位移等結(jié)果,分析各種約束體系的優(yōu)勢和不足。同時以此分析結(jié)果為基礎(chǔ),對三塔懸索橋采用斜吊索體系和斜-豎組合體系進行研究。分析了斜吊索體系和斜-豎組合體系下加勁梁約束方式對主纜抗滑移安全的影響。
[Abstract]:Because of the "mid-tower effect", the requirements of driving comfort (ratio of deflection to span) of three-tower suspension bridge and the safety requirement of anti-slip of main cable become a pair of contradictions. Therefore, the anti-slip design of the main cable and the main saddle in the three-tower suspension bridge becomes one of the main design contents. The main factors affecting the safety of the main cable are the general arrangement of the structure, the stiffness of the middle tower, the nominal friction coefficient between the main cable and the saddle, the size of dead load and live load, the restraint system of stiffened beam, etc. The influence of these factors on the anti-slip safety performance of the main cable and saddle need to be deeply studied and analyzed. This paper briefly introduces the main mechanical characteristics of the three-tower suspension bridge and the research progress of the anti-slip safety of the main cable and saddle. Ignoring the influence of stiffening beam stiffness, the horizontal component of the main cable tension, the main cable shape and the main cable tension under the most unfavorable loading mode of the main cable anti-slip safety are calculated by using the superposition principle. Furthermore, the formula of the safety coefficient of anti-slip of the main cable of three-tower suspension bridge is obtained. The comparison with the finite element method shows that the formula obtained in this paper has a high accuracy. By using this formula, the effects of span, rise-span ratio, mid-tower stiffness, dead load and live load on the safety factor of the main cable are analyzed. The friction behavior of main cable strands and saddle is analyzed by finite element method. The contact model between single root strands and saddle grooves was established by ANSYS software. In the friction model test of the main cable and saddle, the cable force and displacement curve of the single cable strut in the sliding process of the saddle slot were obtained by simulating the working conditions of the single cable strut in the friction model test of the main cable and saddle. The nominal friction coefficient between single root strands and saddle grooves is calculated according to the finite element results. In this paper, a three-tower suspension bridge with a main span of 800m is taken as an example to study the stiffened beam restraint system under the flexible and rigid mid-tower schemes. Compared with the results of safety factor of anti-slip of main cable and dead load, temperature load, restrained reaction force under live load, stress of middle tower and main beam and displacement of stiffened beam, the advantages and disadvantages of various restraint systems were analyzed. At the same time, based on the analysis results, the slanting sling system and the slanting-vertical composite system are studied for the three-tower suspension bridge. The influence of stiffening beam restraint mode on the slippage safety of the main cable is analyzed in the slanting slings system and the skew-vertical composite system.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U448.25

【參考文獻】

相關(guān)期刊論文 前10條

1 吳海軍;王邵銳;周志祥;姬同庚;;超大跨自錨式懸索橋主梁配重研究[J];中外公路;2013年02期

2 張清華;李喬;;懸索橋主纜與鞍座間摩擦特性試驗研究[J];土木工程學(xué)報;2013年04期

3 柴生波;肖汝誠;孫斌;;活載下懸索橋主纜變形特性[J];同濟大學(xué)學(xué)報(自然科學(xué)版);2012年10期

4 韓安鳳;;混凝土自錨式懸索橋配重設(shè)計初探[J];低溫建筑技術(shù);2012年06期

5 姜洋;肖汝誠;李揚;項海帆;;多塔懸索橋主纜與鞍座滑動失穩(wěn)臨界跨徑[J];同濟大學(xué)學(xué)報(自然科學(xué)版);2012年03期

6 柴生波;肖汝誠;張學(xué)義;謝亞洲;;多跨懸索橋中塔縱向剛度研究[J];中國公路學(xué)報;2012年02期

7 張勁泉;曲兆樂;宋建永;楊昀;;多塔懸索橋的兩個主要控制指標(biāo)及其計算工況[J];公路交通科技;2011年08期

8 周凌遠;李喬;;纜索與鞍座間的摩擦特性[J];蘭州理工大學(xué)學(xué)報;2011年02期

9 梁鵬;吳向男;李萬恒;徐岳;;三塔懸索橋縱向約束體系優(yōu)化[J];中國公路學(xué)報;2011年01期

10 楊光武;徐宏光;張強;;馬鞍山長江大橋三塔懸索橋關(guān)鍵技術(shù)研究[J];橋梁建設(shè);2010年05期

相關(guān)會議論文 前1條

1 陳仁福;張金平;;運用重力剛度法求大跨懸索橋內(nèi)力和位移的影響線與包絡(luò)圖[A];全國索結(jié)構(gòu)學(xué)術(shù)交流會論文集[C];1991年

相關(guān)碩士學(xué)位論文 前4條

1 邱景;斜拉-懸吊組合體系橋梁的力學(xué)行為及施工過程分析[D];西南交通大學(xué);2011年

2 陳璨;斜拉索平行鋼絲摩擦系數(shù)及正壓力分析[D];重慶交通大學(xué);2011年

3 朱本瑾;多塔懸索橋的結(jié)構(gòu)體系研究[D];同濟大學(xué);2007年

4 王萍;多塔連續(xù)體系懸索橋靜動力特性的研究[D];西南交通大學(xué);2007年

，

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