Micro-Analysis of Railway Ballast Bond Effects

被引:4
|
作者
Jing, Guoqing [1 ,2 ]
Shao, Lei [3 ]
Zhu, Yadi [1 ]
Gao, Liang [1 ]
机构
[1] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China
[2] Southwest Jiaotong Univ, MOE Key Lab High Speed Railway Engn, Chengdu 610031, Peoples R China
[3] Dalian Univ Technol, Coastal & Offshore Engn, Dalian 116023, Peoples R China
来源
TRENDS IN CIVIL ENGINEERING, PTS 1-4 | 2012年 / 446-449卷
基金
中国国家自然科学基金;
关键词
DEM; ballast-sleeper; ballast glue; stiffness;
D O I
10.4028/www.scientific.net/AMR.446-449.2492
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Ballast glue is a material to adjust ballast stiffness and stabilize ballast from flying due to high speed train winds; its ballast-glue system is less of microscopic mechanism research. In this paper, 3D DEM method is used to produce sleeper-ballast box model, ballast is made of real size irregular clumps, the ballast glue is represented by bonds to simulate the tensile and shear strength, it works at the ballast-ballast particles interaction contacts physically. The sleeper induced monotonic loadings results show the ballast-sleeper microscopic contact force chain distribution is altered due to ballast glue bonding effects, the glue results in tension forces among ballast system. The ballast-box bearing ability is improved with ballast global stiffness increase; ballast-box global stiffness increases with the glue bonding layer depth non-proportional, and is governed by the top 10cm layer.
引用
收藏
页码:2492 / +
页数:2
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