长大坡道桥上单元板式无砟轨道纵向力学特性分析

王伟华,刘克飞,李培刚

铁道工程学报 ›› 2011, Vol. 28 ›› Issue (2) : 65-70.

PDF(829 KB)
PDF(829 KB)
铁道工程学报 ›› 2011, Vol. 28 ›› Issue (2) : 65-70.
路网研究

长大坡道桥上单元板式无砟轨道纵向力学特性分析

  • 王伟华1,刘克飞2,李培刚2
作者信息 +

Analysis of Longitudinal Mechanics Behaviour of Ballastless Slab Track on Long Grade Bridge

  • WANG Wei - hua1,LIU Kei - fei2,LI Pei - gang
Author information +
文章历史 +

摘要

研究目的: 为了分析温度荷载、列车荷载作用下长大坡道桥上板式无砟轨道纵向力学特性,为大坡道上无砟轨道设计提供理论依据。
研究结论: 本文根据“线 - 桥 - 墩”纵向相互作用机理,运用有限元方法,建立了“钢轨 - 轨道板 - 桥梁 -墩台”纵向一体化计算模型,并编制了相应的通用程序。利用所编制的程序,计算了客运专线上常见的 5 ×32 m 简支梁和连续梁纵向力学特性,并对扣件纵向阻力、凸台树脂弹性模量、板底摩擦系数以及温度荷载的大小进行了参数影响分析。计算分析结果表明: ( 1) 对于大坡道板式轨道,应将钢轨和轨道板、轨道板和桥梁的纵向相对位移限制在 0. 2 mm 以内,对应的凸台树脂的弹性模量应大于 120 MPa。( 2) 大坡道桥上需增加考虑制动作用和活载的纵向分力进行凸台的承载能力检算。同时应加强凸台结构以及凸台、填充树脂和轨道板的粘结强度。

Abstract

Research purposes: The analysis of the longitudinal mechanics behaviour of the ballastless slab track on long grade bridge under the effects of the temperature load and train load was made for providing the theoretical basis for the design of the long grade ballastless track.
Research conclusions: The finite element method was used to set up a longitudinal integration calculation model of rail -track slab - bridge - pier based on the longitudinal interaction mechanism of line - bridge - pier,and the corresponding general calculation program was compiled. With the program,the longitudinal stresses behaviour of the commonly - used 5 × 32 m simply - supported beam bridge and continuous bridge of passenger dedicated line were calculated,and the analyses of the parameter influence of the fastener longitudinal resistance,resin elastic modulus of the convex plate, friction coefficient of the bottom track slab and the temperature load value were made. The calculation results show ( 1) For the long grade slab track,the longitudinal relative displacements of rail - slab and slab - bridge should be limited within the range of 0. 2 mm and the corresponding resin elastic modulus of convex plate should be larger than 120 MPa. ( 2) The brake effect and longitudinal component force of live load should be applied to the bridge on long grade to make the computational check of convex plate. At the same time,the convex plate structure should be strengthened and the bonding strengths of convex plate,filling resin and track slab should be enhanced.

关键词

桥梁 / 长大坡道 / 板式无砟轨道 / 纵向力学特性

Key words

bridge / long grade / slab track / longitudinal mechanics behaviour

引用本文

导出引用
王伟华, 刘克飞, 李培刚. 长大坡道桥上单元板式无砟轨道纵向力学特性分析[J]. 铁道工程学报, 2011, 28(2): 65-70
WANG Wei - hua, LIU Kei - fei, LI Pei - gang. Analysis of Longitudinal Mechanics Behaviour of Ballastless Slab Track on Long Grade Bridge[J]. Journal of Railway Engineering Society, 2011, 28(2): 65-70
中图分类号: U213. 2   

参考文献

[1] 何华武. 我国客运专线应大力发展无砟轨道[J]. 中国铁路,2005( 1) : 11 -15.
He Huawu. Ballastless Track Shall be Developed in Great Efforts on Chinese Passenger Dedicated Lines [J]. Chinese Railways,2005( 1) : 11 -15.
[2] 田利民. 客运专线无砟轨道系统设计[J]. 中国铁道科学, 2008( 1) : 13 - 16.
Tian Limin. Systematic Design of Ballastless Track on Passenger Dedicated Lines[J]. China Railway Science, 2008( 1) : 13 - 16.
[3] 陈小平,王平. 客运专线桥上纵连板式无砟轨道制动附加力影响因素分析[J]. 铁道建筑,2008( 9) : 87 -90.
Chen Xiaoping,Wang Ping. Analysis of Affected Factors upon Additional Brake Force for Longitudinal - eontinnous - slab - type Ballastless on Passenger - dedicated Railway Bridge[J]. Railway Engineering, 2008( 9) : 87 - 90.
[4] 沈东升. 无砟轨道设计理论及方法综述[J]. 铁道建筑, 2008( 2) : 99 - 101.
Shen Dongsheng. Summary of the Design Theory and Method for Ballastless Track[J]. Railway Engineering, 2008( 2) : 99 - 101.
[5] 孙立. 大坡道曲线连续桥上无缝线路设计方法研究[J].铁道工程学报,2004( 4) : 43 -46.
Sun Li. Research on Design Method of Welded Track on Continuous Beam Bridge with Heavy Grade and Curve[J]. Journal of Railway Engineering Society, 2004( 4) : 43 - 46.
[6] Coenraad Esveld. Modern Railway Track ( second edition) [M ]. Netherlands: MRT - Productions,2003.
[7] Vogel W. Earthwork Structures for New Railway Lines Slab Track—principles and Suggestions for Realization [J]. Railway Technical Review,1995( 1) : 29 -36.
[8] Esveld C. Recent Developments in Slab Track[J]. European Railway Review,2003( 2) : 81 - 85.
[9] 左景奇,姜其斌,傅代正. 板式轨道弹性垫层 CA 砂浆的研究[J]. 铁道建筑,2005( 9) : 96 -98.
Zuo Jingqi, Jiang Qibin, Fu Daizheng. Study of Cement Asphalt Motar Included in Elastic Pad under Slab Track Railway Engineering,2005( 9) : 96 - 98.
[10] 肖杰灵,刘学毅,杨荣山. 无砟轨道系统功能设计的概念与内涵[J]. 铁道工程学报,2008 ( 3) : 20 -23.
Xiao Jieling,Liu Xueyi,Yang Rongshan. Concept and Intension on System Function Design of Ballastless Track[J]. Journal of Railway Engineering Society, 2008( 3) : 20 - 23.
 

PDF(829 KB)

2973

Accesses

0

Citation

Detail

段落导航
相关文章

/