| 京沪高铁(90+180+90)m连续梁拱桥结构性能分析 |
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| 引用本文： | 朱张峰,郭正兴,刘利军.京沪高铁(90+180+90)m连续梁拱桥结构性能分析[J].铁道工程学报,2011(1). |
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| 作者姓名： | 朱张峰 郭正兴 刘利军 |
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| 作者单位： | 1. 东南大学,南京,210096
2. 中交三公局第一工程有限公司,北京,100102 |
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| 摘 要： | 研究目的:探讨京沪高铁大跨桥梁中连续梁拱桥组合结构的结构性能,以京沪高铁沿线最大跨度(90+180+90)m连续梁拱桥为背景,建立其空间杆系有限元模型,进行详细的计算分析,研究成桥阶段内力和变形、活荷载效应、长期徐变变形、承载能力及结构动力特性等,并与不考虑拱的单独连续梁结构对比,掌握组合结构的受力特性。研究结论:先梁后拱施工的连续梁拱组合结构具有整体受力特性,拱能主动承担主梁自重,并能改善结构的活荷载效应、徐变效应,提高极限承载力,增加结构安全度并改善结构长期运营性能。拱脚推力使结构轴向受力和变形增大,同时,由于拱平面外刚度较低,使得组合结构前几阶振型多次出现拱平面外振动。
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| 关 键 词： | 京沪高铁 结构性能 有限元分析 连续梁拱组合桥 |
Analysis of Structural Performance of (90 + 180 + 90) m Continuous Beam and Arch Combined Bridge of Beijing-Shanghai High-speed Railway |
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| ZHU Zhang-feng,GUO Zheng-xing,LIU Li-jun.Analysis of Structural Performance of (90 + 180 + 90) m Continuous Beam and Arch Combined Bridge of Beijing-Shanghai High-speed Railway[J].Journal of Railway Engineering Society,2011(1). |
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| Authors: | ZHU Zhang-feng GUO Zheng-xing LIU Li-jun |
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| Institution: | ZHU Zhang-feng1,GUO Zheng-xing1,LIU Li-jun2(1.Southeast University,Nanjing,Jiangsu 210096,China,2.The First Engineering Co.Ltd,the CCCC Third Highway Engineering Co.Ltd,Beijing 100102,China) |
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| Abstract: | Research purposes: The Structure performance of continuous beam and arch combined bridge of Beijing-Shanghai High-speed Railway was discussed.For the longest-span(90+180+90) m continuous beam and arch combined bridge of Beijing-Shanghai High-speed Railway,the space member system element finite model was established to detailedly calculate,analyze and research the internal force and creep deformation during bridging,live load effect,long-term creep deflection,load bearing capacity and dynamic characteristics... |
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| Keywords: | Beijing-Shanghai High-speed Railway structure performance finite element analysis continuous beam and arch combined bridge |
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