桥上单元板式无砟轨道无缝线路的适应性

谢铠泽; 王平; 徐井芒; 徐浩

doi:10.3969/j.issn.0258-2724.2014.04.014

桥上单元板式无砟轨道无缝线路的适应性

doi: 10.3969/j.issn.0258-2724.2014.04.014

基金项目:

国家自然科学基金资助项目（U1234201）

详细信息

通讯作者:
王平（1969- ），男，教授，博士，研究方向为高速重载轨道结构及轨道动力学，E-mail：wping@home.swjtu.edu.cn

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出版历程
- 收稿日期: 2013-02-28
- 刊出日期: 2014-08-25

Adaptability of Continuous Welded Rail of Unit Slab Non-ballast Track on Bridges

摘要

摘要: 为研究适应连续梁桥上单元板式无砟轨道的最大温度跨度，采用有限元方法建立了线-板-桥-墩一体化计算模型，分析了在不同轨温变化幅度下，桥梁伸缩、墩顶水平位移及列车制动荷载对桥上单元板式无砟轨道无缝线路温度跨度限值的影响.研究结果表明：温度跨度限值随轨温变化幅度的增加而降低；为保证钢轨强度、横向压弯变形及钢轨与轨道板相对位移等满足要求，当考虑桥梁伸缩时，以轨温变化40 ℃为例，其适应的温度跨度限值为271 m；随着墩顶水平位移的增加，桥梁温度跨度限值显著降低，当墩顶位移为30 mm时，温度跨度为237 m，当高墩桥梁墩顶位移超过30 mm时，应结合实际墩顶位移计算温度跨度限值；制动荷载下线路坡度对温度跨度限值影响较小，当线路坡度为20‰时，桥梁温度跨度限值为258 m.
- 单元板式无砟轨道 /
- 无缝线路 /
- 限值 /
- 适应性
Abstract: To investigate the reasonable limit value of the distance between two fixed bearings of a continuous beam bridge on which unit slab non-ballast track was layed, a rail-slab-bridge-pier integrated model was established by the finite element method. In conditions of different rail temperatures, the influence of bridge temperature change, the lateral displacement at the top of pier, and train braking on the limit value of the distance between two fixed bearings of the continuous beam bridge was analyzed. The results show that the limit value decreases with an increase in the amplitude of rail temperature variation. Taking the rail temperature variation of 40 ℃ for example, the limit value is 271 m due to the requirements of rail strength, transverse bending deformation, and the relative displacement between rail and slab. With the increase of the lateral displacement at the top of pier, the limit value decreases significantly. When the displacement is 30 mm, the limit value is 237 m. When the displacement is more than 30 mm, the limit value should be calculated in dependence on the actual displacement at the top of pier. In addition, the track gradient has little influence on the limit value under braking load condition: When the track gradient is 20‰, the limit value is 258 m.
- unit slab non-ballast track /
- continuous welded rail /
- limit value /
- adaptability

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参考文献(15)

何华武. 无砟轨道技术[M]. 北京:中国铁道出版社,2005: 1-15,74-86.

ZHANG Shuguang. Study on technology system and system integration method of China high-speed railway[C]//Proceedings of the ASME Joint Rail Conference. Urbana: [s.n], 2010: 501-506.

刘学毅,赵坪锐,杨荣山,等. 客运专线无砟轨道设计理论与方法[M]. 成都:西南交通大学出版社,2010: 4-22.

崔丽红,郭福安,江忠贵,等. 长大混凝土桥梁无砟轨道温度跨度的研究[J]. 铁道工程学报,2012(7): 11-13,28. CUI Lihong, GUO Fuan, JIANG Zhonggui, et al. Research on temperature span of ballastless track on large-span concrete bridge[J]. Jouranl of Railway Engineering Society, 2012(7): 11-13,28.

陈小平. 桥梁温度跨度对CRTSⅡ型板式无砟轨道无缝线路的影响[J]. 华东交通大学学报,2012,29(6): 26-30. CHEN Xiaoping. Effects of bridge expansion length on continuous welded rail of CRTSⅡslab ballastless track[J]. Jouranl of East China Jiaotong University, 2012, 29(6): 26-30.

曲村,高亮,乔神路. 高速铁路长大桥梁CRTSⅠ型板式无砟轨道无缝线路力学特性分析[J]. 铁道标准设计,2011(4): 12-16. QU Cun, GAO Liang, QIAO Shenlu. Mechanical characteristics analysis of CRTSⅠslab CWR track on long-span bridge in high-speed railway[J]. Railway Standard Design, 2011(4): 12-16.

高亮,杨文茂,曲村,等. 高速铁路长大桥梁CRTSⅠ型板式无砟轨道无缝线路的动力特性[J]. 北京交通大学学报,2013,37(1): 73-79. GAO Liang, YANG Wenmao, QU Cun, et al. Dynamic characteristics of CRTSⅠslab CWR track on long-span bridge in high-speed railway[J]. Journal of Beijing Jiaotong University, 2013, 37(1): 73-79.

谢铠泽,徐井芒,魏贤奎,等. 桥上无缝线路附加伸缩力放散的计算研究[J]. 铁道标准设计,2012(4): 28-31. XIE Kaize, XU Jingmang, WEI Xiankui, et al. Research on caculation of stress relief of additional expansion froce of continuously welded rails on bridge[J]. Railway Standard Design, 2012(4): 28-31.

赵卫华,王平,曹洋. 大跨度钢桁斜拉桥上无缝线路制动力的计算[J]. 西南交通大学学报,2012,47(3): 361-366. ZHAO Weihua, WANG Ping, CAO Yang. Calculation of braking force of continuous welded rail on large-span steel truss cable-stayed bridge[J]. Jouranl of Southwest Jiaotong University, 2012, 47(3): 361-366.

广钟岩,高慧安. 铁路无缝线路[M]. 4版. 北京:人民交通出版社,2010: 206-214.

陈杨. 桥上CRTS型板式无砟轨道纵向力分析. 成都:西南交通大学,2009.

赵坪锐. 客运专线无砟轨道设计理论与方法[D]. 成都:西南交通大学,2010.

徐庆元,陈秀方. 连续梁桥上无缝线路附加力研究[J]. 中国铁道科学,2003,24(6): 58-63. XU Qingyuan, CHEN Xiufang. Study on additional force transmission between continuously welded rails and continuous beam bridge[J]. China Railway Science, 2003, 24(6): 58-63.

王平,刘学毅. 无缝道岔计算理论与设计方法[M]. 成都:西南交通大学出版社,2008: 243-254.

卢耀荣. 无缝线路研究与应用[M]. 2版. 北京:中国铁道出版社,2010: 397-404.

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