| 偶然荷载对桥上岔区纵连无砟轨道受力和位移的影响 |
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| 引用本文： | 任娟娟,王平,李培刚,刘学毅. 偶然荷载对桥上岔区纵连无砟轨道受力和位移的影响[J]. 中国铁道科学, 2011, 32(1) |
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| 作者姓名： | 任娟娟 王平 李培刚 刘学毅 |
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| 作者单位： | 西南交通大学高速铁路线路工程教育部重点实验室,四川,成都,610031 |
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| 基金项目： | 国家自然科学基金资助项目(51078320); 中央高校基本科研业务费科技创新项目(SWJTU09CX003,SWJTU09BR014); 高等学校博士学科点专项科研基金资助课题(20100184120021) |
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| 摘 要： | 以武广客运专线某特大桥铺设纵连式无砟道岔为例,将1组客运专线18号单渡线道岔、纵连式无砟轨道、桥梁、墩台视为1个系统,建立岔—板—梁—墩一体化计算模型,分析断轨或断板等偶然荷载作用位置对道岔、道床板、桥墩受力和变形的影响。分析结果表明:断轨对墩台纵向力影响较小,但对道床板受力影响较大;一线道床板折断会使另一线的道床板纵向力、墩台纵向力及固结机构纵向力大幅增加,不利于道床板、墩台及固结机构的受力;连续梁桥梁缝处道床板折断对桥墩受力极为不利,故在设计中应避免使道床板在桥上无缝道岔梁缝附近形成最大纵向力。
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| 关 键 词： | 桥上无缝道岔 纵连式无砟轨道 偶然荷载 桥梁 轨道结构 纵向位移 受力分析 |
Influence of the Accidental Loading on the Force and Displacement of Longitudinal Coupled Slab Track with Seamless Turnout on Bridges |
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| REN Juanjuan,WANG Ping,LI Peigang,LIU Xueyi. Influence of the Accidental Loading on the Force and Displacement of Longitudinal Coupled Slab Track with Seamless Turnout on Bridges[J]. China Railway Science, 2011, 32(1) |
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| Authors: | REN Juanjuan WANG Ping LI Peigang LIU Xueyi |
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| Affiliation: | REN Juanjuan,WANG Ping,LI Peigang,LIU Xueyi(MOE Key Laboratory of High-Speed Railway Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China) |
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| Abstract: | Taking a longitudinal continuous slab track turnout on a bridge of Wuhan-Guangzhou passenger dedicated line for instance,an integral finite element model of turnout-track slab-bridge-pier was established,in which a group of No.18 seamless turnouts with movable frog in form of crossover,longitudinal continuous slab track,bridges and piers was regarded as one system.Based on this model,the effect of the accidental loading locations on the additional forces and displacements of turnouts,track slab,bridges and ... |
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| Keywords: | Seamless turnout on bridge Longitudinal coupled slab track Accidental loading Bridge Track structure Longitudinal displacement Force analysis |
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