| 简支梁桥上连续结合式无碴轨道层间连接设计 |
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| 引用本文： | 赵坪锐, 杨荣山, 刘学毅. 简支梁桥上连续结合式无碴轨道层间连接设计[J]. 交通运输工程学报, 2008, 8(2): 14-17. |
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| 作者姓名： | 赵坪锐 杨荣山 刘学毅 |
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| 作者单位： | 西南交通大学 土木工程学院，四川 成都 610031 |
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| 基金项目： | 教育部跨世纪优秀人才培养计划 , 西南交通大学创新团队培育计划项目 |
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| 摘 要： | 针对32m简支梁桥上连续结合式无碴轨道结构, 分别用换算截面法、有限元法及刚性简化计算法计算了列车活载、轨道板与底座板间温差及列车制动作用下的层间剪力, 得到了层间剪力分布图, 依据该图进行了层间连接件的设计。研究结果表明: 在列车荷载作用下, 层间剪力自梁端至跨中大致呈线性递减分布; 轨道板与底座板间存在10℃温差时, 层间剪力主要集中在桥梁两端5m范围内; 制动力作用下, 结合面上层间剪力沿跨长均匀分布, 均等于作用在轨道板之上的扣件纵向分布阻力; 当三者共同作用时, 轨道板与底座板之间的温差起控制作用, 因此, 桥梁端部受温差影响较大的5m范围内应加密销钉与连接钢筋设置。
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| 关 键 词： | 铁道工程 连续结合式无碴轨道 有限元法 层间剪力 |
| 文章编号： | 1671-1637(2008)02-0014-04 |
| 收稿时间： | 2007-09-25 |
| 修稿时间： | 2007-09-25 |
Interlaminar connection design of continuous combined ballastless track on simply supported bridge |
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| ZHAO Ping-rui, YANG Rong-shan, LIU Xue-yi. Interlaminar connection design of continuous combined ballastless track on simply supported bridge[J]. Journal of Traffic and Transportation Engineering, 2008, 8(2): 14-17. |
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| Authors: | Zhao Ping-rui Yang Rong-shan Liu Xue-yi |
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| Affiliation: | School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China |
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| Abstract: | The interlaminar shear force of continuous combined ballastless track on 32 m simply supported bridge was studied under train load, temperature difference between track slab and support slab and braking force with conversion section method, finite element method and rigid simplified method respectively, its distribution diagram was gotten, and the interlaminar connection design was proposed based on the diagram.The result shows that the shear force under train load linear decreases from the bridge end to the middle; the shear force is concentrated in the 5 m region next to the bridge end when there is a 10 ℃ temperature difference between track slab and support slab; the shear force under braking force evenly distributes along the bridge, which equals to the longitudinal resistance of fastener; when the three factors act together, the shear force is controlled by the temperature difference, so more dowels and connection rebars should be set in the 5 m region, which is heavily influenced by the temperature difference. |
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| Keywords: | railway engineering continuous combined ballastless track finite element method interlaminar shear force |
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