| 基于正装迭代法的三塔结合梁斜拉桥计算分析 |
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| 引用本文： | 张群,刘沐宇.基于正装迭代法的三塔结合梁斜拉桥计算分析[J].华中科技大学学报(城市科学版),2011,28(3). |
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| 作者姓名： | 张群 刘沐宇 |
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| 作者单位： | 武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉,430070 |
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| 基金项目： | 武汉市科技攻关项目(201160923308); 武汉市建设科技项目(200923) |
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| 摘 要： | 为了使斜拉桥建成后受力合理,掌握施工过程中桥梁的内力特性,本文以武汉二七长江大桥为依托,基于正装迭代法,运用MIDAS/CIVIL有限元分析软件,通过建立三塔结合梁斜拉桥双主梁空间有限元模型,分析其各施工阶段及成桥阶段的内力、位移和索力,经过与合理成桥状态进行对比分析,最终确定各施工阶段的节段标高、索力及主梁内力.计算结果表明:合理施工索力与合理成桥索力相比,误差均在±5％范围内,主梁最大抛高40.3 cm,混凝土桥面板未出现拉应力,且最大压应力为8.8 MPa,钢主梁下翼缘最大压应力为159MPa,说明三塔结合梁斜拉桥施工受力合理,斜拉桥索力、主梁内力和位移均满足设计规范要求,计算结果可为三塔结合梁斜拉桥施工提供参考.
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| 关 键 词： | 大跨径 钢-混凝土结合梁 合理施工状态 施工索力 |
Analysis of Composite Girder Cable-stayed Bbridge with Three Towers Based on the Forward-iteration Method |
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| ZHANG Qun,LIU Mu-yu.Analysis of Composite Girder Cable-stayed Bbridge with Three Towers Based on the Forward-iteration Method[J].Journal of Huazhong University of Science and Technology,2011,28(3). |
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| Authors: | ZHANG Qun LIU Mu-yu |
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| Affiliation: | ZHANG Qun,LIU Mu-yu(Hubei Key Laboratory of Roadway Bridge and Structure Engineering,Wuhan University of Technology,Wuhan 430070,China) |
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| Abstract: | To get a reasonable stress distribution in finished bridge state,and grasping t he internal force characteristics during the construction of cable-stayed bridg e,under program background of Wuhan Er-qi Yangtze bridge,this document based on the forward-iteration method,using the FEM analysis program MIDAS/CIVIL,a modal considering two-girders of the bridge was built to analyze the internal f orce,displacement and cable-force of each construction and finished bridge sta te.Compared with the reasonable finishe... |
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| Keywords: | large span steel-concrete composite girder reasonable construction state construction cable-force |
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