本文選題：懸索橋　切入點(diǎn)：靜力計(jì)算分析　出處：《重慶交通大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：懸索橋作為跨越能力最強(qiáng)的橋型,在很多跨越河流、峽谷和海峽的橋梁項(xiàng)目中成了不可缺少的比選方案之一。我國(guó)做為迅速崛起的橋梁大國(guó),越來(lái)越多的懸索橋項(xiàng)目不斷涌現(xiàn)出來(lái)。雖然懸索橋的設(shè)計(jì)理論一直在不斷發(fā)展,同時(shí)許多問(wèn)題仍然需要進(jìn)一步的研究。本文針對(duì)單跨吊鋼箱梁懸索橋進(jìn)行研究,分析大跨度懸索橋的靜動(dòng)力特點(diǎn)。1、本文首先介紹了國(guó)內(nèi)外懸索橋的發(fā)展歷程,總結(jié)了主要國(guó)家懸索橋梁的風(fēng)格和特點(diǎn)。介紹了當(dāng)今世界懸索橋的體系發(fā)展以及主纜、加勁梁等新的結(jié)構(gòu)形式。并且概述了未來(lái)懸索橋在設(shè)計(jì)和施工應(yīng)注意的問(wèn)題。2、詳細(xì)闡述了懸索橋的彈性理論、撓度理論和有限位移理論等三大計(jì)算理論和方法。3、結(jié)合筍溪河特大橋橋址的地形、地貌、地質(zhì)和水文條件,進(jìn)行方案比選；同時(shí)針對(duì)鋼桁加勁梁橋面系結(jié)構(gòu)方案進(jìn)行了技術(shù)研究。4、采用MIDAS軟件建立全橋模型進(jìn)行空間模型設(shè)計(jì)計(jì)算,進(jìn)行包括纜、塔、吊索、加勁梁等主要承重結(jié)構(gòu)的靜力計(jì)算分析。其中包括：①通過(guò)各種作用效應(yīng)組合下的結(jié)構(gòu)內(nèi)力及位移分析,提出結(jié)構(gòu)設(shè)計(jì)所需要的主纜及吊索的控制拉力、加勁梁及橋塔各截面的內(nèi)力和控制截面的豎向撓度及水平變位、支座反力、梁端轉(zhuǎn)角及縱向位移。②根據(jù)設(shè)計(jì)成橋線(xiàn)形、恒載狀況推算空纜線(xiàn)形,計(jì)算索股無(wú)應(yīng)力長(zhǎng)度、鞍座預(yù)偏量、索股初始張力、索夾位置及吊索無(wú)應(yīng)力長(zhǎng)度。③配合施工架設(shè),計(jì)算各施工階段的主纜線(xiàn)形、加勁梁空間位置及橋塔內(nèi)力及變形等。5、對(duì)筍溪河特大橋錨碇進(jìn)行整體穩(wěn)定性分析及局部分析,分析內(nèi)容包含抗滑穩(wěn)定性、抗傾覆定性、錨塊斜截面驗(yàn)算、錨固系統(tǒng)驗(yàn)算以及側(cè)墻驗(yàn)算。6、對(duì)筍溪河特大橋進(jìn)行橋址區(qū)風(fēng)特性和設(shè)計(jì)風(fēng)參數(shù)研究,同時(shí)采用三維空間有限元模型進(jìn)行了結(jié)構(gòu)抗風(fēng)動(dòng)力特性分析。7、對(duì)筍溪河特大橋進(jìn)行抗震研究動(dòng)力分析,模型采用三維空間有限元分析模型進(jìn)行反應(yīng)譜分析。
[Abstract]:As the most capable bridge type, suspension bridge has become one of the indispensable bridge projects across rivers, canyons and straits. More and more suspension bridge projects have been emerging. Although the design theory of suspension bridge has been developing, many problems still need to be further studied. The static and dynamic characteristics of long-span suspension bridges are analyzed. Firstly, the development history of suspension bridges at home and abroad is introduced, and the style and characteristics of suspension bridges in main countries are summarized. The system development and main cables of suspension bridges in the world are introduced. Some new structural forms, such as stiffened beam, etc., and the problems needing attention in the design and construction of the future suspension bridge are summarized, and the elastic theory of the suspension bridge is expounded in detail. Deflection theory and finite displacement theory. 3. Combining the topographic, geomorphological, geological and hydrological conditions of the bridge site of the Zhuxi River Bridge, the schemes are compared and selected. At the same time, based on the technical research of steel truss stiffened beam deck structure, the whole bridge model is built by MIDAS software, and the spatial model is designed and calculated, which includes cable, tower, sling, etc. The static calculation and analysis of the main load-bearing structures such as stiffening beams, including the analysis of the internal forces and displacements of the structures under the combination of various action effects, are included, and the control pull forces of the main cables and slings needed for the structural design are put forward. The internal force of each section of stiffened beam and tower and the vertical deflection and horizontal displacement of the control section, the reaction force of the support, the rotation angle of the beam and the longitudinal displacement .2 are calculated according to the design of the bridge line shape, the dead load condition calculates the cable line shape, and the unstressed length of the cable strands is calculated. The saddle pre-deflection, the initial tension of cable strands, the position of cable clamps and the length of sling without stress are set up together with the construction to calculate the main cable shape in each construction stage. The space position of stiffened beam, the internal force and deformation of the bridge tower, etc. 5. The overall stability analysis and local analysis of the Anchorage of the super large bridge in Chuanxihe are carried out. The contents of the analysis include the anti-slide stability, the anti-overturning qualitative analysis, and the checking calculation of the inclined section of the anchor block. Anchorage system checking calculation and side wall checking calculation. 6. The wind characteristics and design wind parameters of the bridge site area of the Zhuxihe River Bridge are studied. At the same time, three dimensional finite element model is used to analyze the dynamic characteristics of the structure against wind. 7. The seismic analysis of the Chuanxihe Bridge is carried out. The response spectrum of the model is analyzed by using the three-dimensional finite element analysis model.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U441;U448.25

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