异形钢斜塔斜拉桥运营受力与索梁锚固详细应力和桥塔稳定计算分析

发布时间：2018-03-12 10:28

本文选题：斜塔斜拉桥　切入点：有限元模型　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：论文首先回顾斜拉桥的发展和应用现状,着重介绍了国内外几座典型的斜塔斜拉桥,概述常用的索梁锚固形式,并简述斜拉桥钢桥塔的稳定问题。然后,以(70+80+200+80+70)m五跨连续钢箱梁斜塔斜拉桥初步设计方案为工程背景,采用有限元软件MIDAS/CIVIL建立基于梁单元的全桥模型,利用该模型进行整体静力计算分析,研究桥梁结构在运营阶段承受恒载、活载、风荷载和温度变化等单独作用及其组合作用下的变形和应力。接着,采用有限元软件ALGOR建立基于实体单元和板单元的全桥组合单元模型,对索梁锚固结构所在梁段进行单元细化,计算分析在最大索力作用下索梁锚固结构的详细应力,根据计算结果提出三种优化试算方案,并根据试算结果给出相应优化建议。最后,对全桥组合单元模型中桥塔部分进行单元细化,计算分析桥塔的弹性稳定,根据计算结果提出五种优化试算方案,并根据试算结果给出相应优化建议。
[Abstract]:Firstly, this paper reviews the development and application of cable-stayed bridges, introduces several typical cable-stayed bridges at home and abroad, summarizes the commonly used cable-girder anchoring forms, and briefly describes the stability of steel bridge towers of cable-stayed bridges. Based on the preliminary design of a five-span continuous steel box girder cable-stayed bridge with a span of 70 80 200 80 70 m, the finite element software MIDAS/CIVIL is used to establish the full bridge model based on the beam element, and the model is used to calculate and analyze the whole static force of the bridge. This paper studies the deformation and stress of bridge structure under the action of dead load, live load, wind load and temperature change and their combination. The finite element software ALGOR is used to establish the whole bridge composite element model based on solid element and plate element. The beam section of cable beam Anchorage structure is refined by element, and the detailed stress of cable beam Anchorage structure under maximum cable force is calculated and analyzed. According to the results of calculation, three optimization schemes are put forward, and the corresponding optimization suggestions are given. Finally, the elements of the tower in the whole bridge combination element model are refined, and the elastic stability of the bridge tower is calculated and analyzed. According to the calculation results, five optimization schemes are put forward, and the corresponding optimization suggestions are given according to the results.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442;U448.27

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